/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-770125f [2021-05-21 20:49:21,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:49:21,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:49:21,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:49:21,867 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 [2021-05-21 20:49:21,901 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:49:21,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:49:21,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:49:21,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:49:21,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:49:21,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:49:21,904 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:49:21,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:49:21,904 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:49:21,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:49:21,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:49:21,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:49:21,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:49:21,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:49:21,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:49:21,906 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:49:21,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:49:21,906 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:49:21,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:49:21,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:49:21,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:49:21,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:49:21,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:49:21,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:49:21,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:49:21,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:49:21,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:49:21,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:49:21,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:49:21,908 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:49:21,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:49:21,908 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:49:22,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:49:22,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:49:22,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:49:22,229 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:49:22,230 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:49:22,231 INFO L432 ainManager$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 [2021-05-21 20:49:22,231 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl' [2021-05-21 20:49:22,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:49:22,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:49:22,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:49:22,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:49:22,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:49:22,282 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 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,289 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 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:49:22,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:49:22,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:49:22,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:49:22,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/1) ... [2021-05-21 20:49:22,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:49:22,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:49:22,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:49:22,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:49:22,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (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 [2021-05-21 20:49:22,384 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:49:22,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:49:22,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:49:22,386 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:49:22,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:49:22,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:49:22,386 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:49:22,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:49:22,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:49:22,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:49:22,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:49:22,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:49:22,389 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:49:22,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:49:22,815 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-21 20:49:22,817 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:49:22 BoogieIcfgContainer [2021-05-21 20:49:22,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:49:22,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:49:22,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:49:22,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:49:22,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:22" (1/2) ... [2021-05-21 20:49:22,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be47b48 and model type word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:49:22, skipping insertion in model container [2021-05-21 20:49:22,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:49:22" (2/2) ... [2021-05-21 20:49:22,823 INFO L111 eAbstractionObserver]: Analyzing ICFG word-subst.wvr.bpl [2021-05-21 20:49:22,828 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:49:22,829 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:49:22,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:49:22,829 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:49:22,856 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:49:22,876 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:49:22,908 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:49:22,908 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:49:22,908 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:49:22,908 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:49:22,908 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:49:22,908 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:49:22,908 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:49:22,909 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:49:22,916 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-05-21 20:49:22,943 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) [2021-05-21 20:49:22,945 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) [2021-05-21 20:49:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:49:22,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:22,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:22,957 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:22,962 INFO L82 PathProgramCache]: Analyzing trace with hash -200100504, now seen corresponding path program 1 times [2021-05-21 20:49:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:22,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952561156] [2021-05-21 20:49:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:23,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:23,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952561156] [2021-05-21 20:49:23,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952561156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:23,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:23,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:23,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696842743] [2021-05-21 20:49:23,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:23,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:23,227 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) [2021-05-21 20:49:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:23,290 INFO L93 Difference]: Finished difference Result 171 states and 561 transitions. [2021-05-21 20:49:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:49:23,292 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 [2021-05-21 20:49:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:23,303 INFO L225 Difference]: With dead ends: 171 [2021-05-21 20:49:23,304 INFO L226 Difference]: Without dead ends: 108 [2021-05-21 20:49:23,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-21 20:49:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-21 20:49:23,357 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) [2021-05-21 20:49:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 353 transitions. [2021-05-21 20:49:23,362 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 353 transitions. Word has length 14 [2021-05-21 20:49:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:23,362 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 353 transitions. [2021-05-21 20:49:23,362 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) [2021-05-21 20:49:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 353 transitions. [2021-05-21 20:49:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:49:23,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:23,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:23,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:49:23,367 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1713787741, now seen corresponding path program 1 times [2021-05-21 20:49:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:23,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088326575] [2021-05-21 20:49:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:23,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:23,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088326575] [2021-05-21 20:49:23,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088326575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:23,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:23,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:23,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108333297] [2021-05-21 20:49:23,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:23,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:23,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:23,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:23,498 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) [2021-05-21 20:49:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:23,616 INFO L93 Difference]: Finished difference Result 172 states and 504 transitions. [2021-05-21 20:49:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:23,617 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 [2021-05-21 20:49:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:23,622 INFO L225 Difference]: With dead ends: 172 [2021-05-21 20:49:23,622 INFO L226 Difference]: Without dead ends: 153 [2021-05-21 20:49:23,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-21 20:49:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-05-21 20:49:23,643 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) [2021-05-21 20:49:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 390 transitions. [2021-05-21 20:49:23,644 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 390 transitions. Word has length 15 [2021-05-21 20:49:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:23,644 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 390 transitions. [2021-05-21 20:49:23,645 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) [2021-05-21 20:49:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 390 transitions. [2021-05-21 20:49:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:49:23,650 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:23,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:23,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:49:23,650 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:23,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1520780803, now seen corresponding path program 2 times [2021-05-21 20:49:23,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:23,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001521354] [2021-05-21 20:49:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:23,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001521354] [2021-05-21 20:49:23,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001521354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:23,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:23,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:23,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845084423] [2021-05-21 20:49:23,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:23,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:23,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:23,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:23,752 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) [2021-05-21 20:49:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:23,853 INFO L93 Difference]: Finished difference Result 179 states and 520 transitions. [2021-05-21 20:49:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:23,854 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 [2021-05-21 20:49:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:23,857 INFO L225 Difference]: With dead ends: 179 [2021-05-21 20:49:23,859 INFO L226 Difference]: Without dead ends: 160 [2021-05-21 20:49:23,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-21 20:49:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-05-21 20:49:23,878 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) [2021-05-21 20:49:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 410 transitions. [2021-05-21 20:49:23,879 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 410 transitions. Word has length 15 [2021-05-21 20:49:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:23,880 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 410 transitions. [2021-05-21 20:49:23,880 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) [2021-05-21 20:49:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 410 transitions. [2021-05-21 20:49:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:49:23,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:23,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:23,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:49:23,883 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:23,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:23,883 INFO L82 PathProgramCache]: Analyzing trace with hash 372369077, now seen corresponding path program 3 times [2021-05-21 20:49:23,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:23,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090524086] [2021-05-21 20:49:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:23,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:23,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090524086] [2021-05-21 20:49:23,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090524086] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:23,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:23,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:23,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175832157] [2021-05-21 20:49:23,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,000 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) [2021-05-21 20:49:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,097 INFO L93 Difference]: Finished difference Result 235 states and 657 transitions. [2021-05-21 20:49:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,098 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 [2021-05-21 20:49:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,099 INFO L225 Difference]: With dead ends: 235 [2021-05-21 20:49:24,099 INFO L226 Difference]: Without dead ends: 216 [2021-05-21 20:49:24,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-21 20:49:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 135. [2021-05-21 20:49:24,108 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) [2021-05-21 20:49:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 422 transitions. [2021-05-21 20:49:24,109 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 422 transitions. Word has length 15 [2021-05-21 20:49:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,109 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 422 transitions. [2021-05-21 20:49:24,109 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) [2021-05-21 20:49:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 422 transitions. [2021-05-21 20:49:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:49:24,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,111 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:49:24,111 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,112 INFO L82 PathProgramCache]: Analyzing trace with hash 384286855, now seen corresponding path program 4 times [2021-05-21 20:49:24,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756163106] [2021-05-21 20:49:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756163106] [2021-05-21 20:49:24,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756163106] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:24,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808803705] [2021-05-21 20:49:24,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:24,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:24,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,266 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) [2021-05-21 20:49:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,334 INFO L93 Difference]: Finished difference Result 194 states and 550 transitions. [2021-05-21 20:49:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,335 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 [2021-05-21 20:49:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,336 INFO L225 Difference]: With dead ends: 194 [2021-05-21 20:49:24,336 INFO L226 Difference]: Without dead ends: 171 [2021-05-21 20:49:24,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-21 20:49:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2021-05-21 20:49:24,340 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) [2021-05-21 20:49:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 420 transitions. [2021-05-21 20:49:24,341 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 420 transitions. Word has length 15 [2021-05-21 20:49:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,341 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 420 transitions. [2021-05-21 20:49:24,341 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) [2021-05-21 20:49:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 420 transitions. [2021-05-21 20:49:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:49:24,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,342 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:49:24,342 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1046340473, now seen corresponding path program 5 times [2021-05-21 20:49:24,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142977062] [2021-05-21 20:49:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142977062] [2021-05-21 20:49:24,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142977062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864249263] [2021-05-21 20:49:24,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:24,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:24,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,406 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) [2021-05-21 20:49:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,487 INFO L93 Difference]: Finished difference Result 228 states and 638 transitions. [2021-05-21 20:49:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,488 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 [2021-05-21 20:49:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,489 INFO L225 Difference]: With dead ends: 228 [2021-05-21 20:49:24,489 INFO L226 Difference]: Without dead ends: 209 [2021-05-21 20:49:24,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-21 20:49:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 137. [2021-05-21 20:49:24,493 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) [2021-05-21 20:49:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 427 transitions. [2021-05-21 20:49:24,494 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 427 transitions. Word has length 15 [2021-05-21 20:49:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,494 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 427 transitions. [2021-05-21 20:49:24,495 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) [2021-05-21 20:49:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 427 transitions. [2021-05-21 20:49:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:49:24,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,495 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 20:49:24,496 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash -964122021, now seen corresponding path program 6 times [2021-05-21 20:49:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720197761] [2021-05-21 20:49:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720197761] [2021-05-21 20:49:24,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720197761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:24,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214802681] [2021-05-21 20:49:24,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:24,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:24,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,562 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) [2021-05-21 20:49:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,635 INFO L93 Difference]: Finished difference Result 195 states and 552 transitions. [2021-05-21 20:49:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,636 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 [2021-05-21 20:49:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,637 INFO L225 Difference]: With dead ends: 195 [2021-05-21 20:49:24,637 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:49:24,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:49:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-05-21 20:49:24,642 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) [2021-05-21 20:49:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 425 transitions. [2021-05-21 20:49:24,643 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 425 transitions. Word has length 15 [2021-05-21 20:49:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,643 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 425 transitions. [2021-05-21 20:49:24,643 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) [2021-05-21 20:49:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 425 transitions. [2021-05-21 20:49:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:24,644 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,644 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 20:49:24,644 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1568921575, now seen corresponding path program 1 times [2021-05-21 20:49:24,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164136662] [2021-05-21 20:49:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164136662] [2021-05-21 20:49:24,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164136662] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:24,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219589176] [2021-05-21 20:49:24,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:24,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:24,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:24,670 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) [2021-05-21 20:49:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,698 INFO L93 Difference]: Finished difference Result 203 states and 586 transitions. [2021-05-21 20:49:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,698 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 [2021-05-21 20:49:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,700 INFO L225 Difference]: With dead ends: 203 [2021-05-21 20:49:24,700 INFO L226 Difference]: Without dead ends: 203 [2021-05-21 20:49:24,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-21 20:49:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2021-05-21 20:49:24,706 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) [2021-05-21 20:49:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 421 transitions. [2021-05-21 20:49:24,707 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 421 transitions. Word has length 16 [2021-05-21 20:49:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,707 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 421 transitions. [2021-05-21 20:49:24,707 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) [2021-05-21 20:49:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 421 transitions. [2021-05-21 20:49:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:24,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 20:49:24,709 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1557107456, now seen corresponding path program 1 times [2021-05-21 20:49:24,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211944100] [2021-05-21 20:49:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211944100] [2021-05-21 20:49:24,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211944100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:24,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565966299] [2021-05-21 20:49:24,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:24,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:24,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:24,742 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) [2021-05-21 20:49:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,768 INFO L93 Difference]: Finished difference Result 194 states and 542 transitions. [2021-05-21 20:49:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,768 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 [2021-05-21 20:49:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,769 INFO L225 Difference]: With dead ends: 194 [2021-05-21 20:49:24,770 INFO L226 Difference]: Without dead ends: 171 [2021-05-21 20:49:24,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-21 20:49:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2021-05-21 20:49:24,773 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) [2021-05-21 20:49:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 408 transitions. [2021-05-21 20:49:24,774 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 408 transitions. Word has length 16 [2021-05-21 20:49:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,774 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 408 transitions. [2021-05-21 20:49:24,774 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) [2021-05-21 20:49:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 408 transitions. [2021-05-21 20:49:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:24,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 20:49:24,775 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1420564495, now seen corresponding path program 2 times [2021-05-21 20:49:24,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352888771] [2021-05-21 20:49:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352888771] [2021-05-21 20:49:24,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352888771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:24,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122142267] [2021-05-21 20:49:24,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:24,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:24,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:24,801 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) [2021-05-21 20:49:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,823 INFO L93 Difference]: Finished difference Result 205 states and 567 transitions. [2021-05-21 20:49:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,823 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 [2021-05-21 20:49:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,824 INFO L225 Difference]: With dead ends: 205 [2021-05-21 20:49:24,824 INFO L226 Difference]: Without dead ends: 205 [2021-05-21 20:49:24,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-21 20:49:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 114. [2021-05-21 20:49:24,828 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) [2021-05-21 20:49:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 330 transitions. [2021-05-21 20:49:24,828 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 330 transitions. Word has length 16 [2021-05-21 20:49:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,828 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 330 transitions. [2021-05-21 20:49:24,829 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) [2021-05-21 20:49:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 330 transitions. [2021-05-21 20:49:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:24,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,829 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-21 20:49:24,830 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1521275701, now seen corresponding path program 3 times [2021-05-21 20:49:24,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588106859] [2021-05-21 20:49:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588106859] [2021-05-21 20:49:24,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588106859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:24,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565098970] [2021-05-21 20:49:24,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:24,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:24,846 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) [2021-05-21 20:49:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,864 INFO L93 Difference]: Finished difference Result 171 states and 460 transitions. [2021-05-21 20:49:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:49:24,865 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 [2021-05-21 20:49:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,866 INFO L225 Difference]: With dead ends: 171 [2021-05-21 20:49:24,866 INFO L226 Difference]: Without dead ends: 165 [2021-05-21 20:49:24,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-21 20:49:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2021-05-21 20:49:24,869 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) [2021-05-21 20:49:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 317 transitions. [2021-05-21 20:49:24,870 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 317 transitions. Word has length 16 [2021-05-21 20:49:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,870 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 317 transitions. [2021-05-21 20:49:24,870 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) [2021-05-21 20:49:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 317 transitions. [2021-05-21 20:49:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:24,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,871 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 20:49:24,871 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1372165464, now seen corresponding path program 2 times [2021-05-21 20:49:24,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363685016] [2021-05-21 20:49:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363685016] [2021-05-21 20:49:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363685016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:24,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480521265] [2021-05-21 20:49:24,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:24,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:24,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:24,889 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) [2021-05-21 20:49:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,908 INFO L93 Difference]: Finished difference Result 179 states and 482 transitions. [2021-05-21 20:49:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:24,908 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 [2021-05-21 20:49:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,909 INFO L225 Difference]: With dead ends: 179 [2021-05-21 20:49:24,909 INFO L226 Difference]: Without dead ends: 164 [2021-05-21 20:49:24,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-21 20:49:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 114. [2021-05-21 20:49:24,914 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) [2021-05-21 20:49:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-05-21 20:49:24,915 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 16 [2021-05-21 20:49:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,915 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-05-21 20:49:24,915 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) [2021-05-21 20:49:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-05-21 20:49:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:24,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-21 20:49:24,916 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,916 INFO L82 PathProgramCache]: Analyzing trace with hash -507426732, now seen corresponding path program 3 times [2021-05-21 20:49:24,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985830850] [2021-05-21 20:49:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985830850] [2021-05-21 20:49:24,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985830850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:24,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972833650] [2021-05-21 20:49:24,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:24,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:24,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:24,939 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) [2021-05-21 20:49:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,954 INFO L93 Difference]: Finished difference Result 156 states and 416 transitions. [2021-05-21 20:49:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:49:24,954 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 [2021-05-21 20:49:24,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,955 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:49:24,955 INFO L226 Difference]: Without dead ends: 146 [2021-05-21 20:49:24,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-21 20:49:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-05-21 20:49:24,959 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) [2021-05-21 20:49:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 315 transitions. [2021-05-21 20:49:24,960 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 315 transitions. Word has length 16 [2021-05-21 20:49:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:24,960 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 315 transitions. [2021-05-21 20:49:24,960 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) [2021-05-21 20:49:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 315 transitions. [2021-05-21 20:49:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:24,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:24,961 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:24,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-21 20:49:24,961 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1294148210, now seen corresponding path program 4 times [2021-05-21 20:49:24,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:24,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475932402] [2021-05-21 20:49:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:24,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:24,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475932402] [2021-05-21 20:49:24,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475932402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:24,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:24,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:24,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8732601] [2021-05-21 20:49:24,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:24,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:24,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:24,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:24,980 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) [2021-05-21 20:49:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:24,995 INFO L93 Difference]: Finished difference Result 151 states and 405 transitions. [2021-05-21 20:49:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:49:24,995 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 [2021-05-21 20:49:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:24,996 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:49:24,996 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:49:24,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:49:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2021-05-21 20:49:25,000 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) [2021-05-21 20:49:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 312 transitions. [2021-05-21 20:49:25,000 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 312 transitions. Word has length 16 [2021-05-21 20:49:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:25,000 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 312 transitions. [2021-05-21 20:49:25,001 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) [2021-05-21 20:49:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 312 transitions. [2021-05-21 20:49:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:49:25,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:25,001 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:25,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-21 20:49:25,001 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:25,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1904685263, now seen corresponding path program 4 times [2021-05-21 20:49:25,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:25,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988880188] [2021-05-21 20:49:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:25,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:25,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988880188] [2021-05-21 20:49:25,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988880188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:25,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:25,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:49:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803313558] [2021-05-21 20:49:25,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:49:25,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:49:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:49:25,019 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) [2021-05-21 20:49:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:25,032 INFO L93 Difference]: Finished difference Result 116 states and 321 transitions. [2021-05-21 20:49:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:49:25,032 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 [2021-05-21 20:49:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:25,033 INFO L225 Difference]: With dead ends: 116 [2021-05-21 20:49:25,033 INFO L226 Difference]: Without dead ends: 108 [2021-05-21 20:49:25,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-21 20:49:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-21 20:49:25,036 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) [2021-05-21 20:49:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-05-21 20:49:25,037 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-05-21 20:49:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:25,037 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-05-21 20:49:25,037 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) [2021-05-21 20:49:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-05-21 20:49:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:25,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:25,038 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:25,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-21 20:49:25,038 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:25,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:25,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1361223606, now seen corresponding path program 1 times [2021-05-21 20:49:25,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:25,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227436151] [2021-05-21 20:49:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:25,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:25,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227436151] [2021-05-21 20:49:25,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227436151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:25,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:25,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:25,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897008598] [2021-05-21 20:49:25,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:25,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:25,134 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) [2021-05-21 20:49:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:25,316 INFO L93 Difference]: Finished difference Result 265 states and 721 transitions. [2021-05-21 20:49:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:25,317 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 [2021-05-21 20:49:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:25,318 INFO L225 Difference]: With dead ends: 265 [2021-05-21 20:49:25,318 INFO L226 Difference]: Without dead ends: 250 [2021-05-21 20:49:25,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-21 20:49:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-05-21 20:49:25,325 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) [2021-05-21 20:49:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-05-21 20:49:25,326 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-05-21 20:49:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:25,326 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-05-21 20:49:25,326 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) [2021-05-21 20:49:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-05-21 20:49:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:25,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:25,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:25,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-21 20:49:25,329 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1726190618, now seen corresponding path program 2 times [2021-05-21 20:49:25,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:25,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448574819] [2021-05-21 20:49:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:25,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:25,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448574819] [2021-05-21 20:49:25,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448574819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:25,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:25,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802030132] [2021-05-21 20:49:25,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:25,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:25,433 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) [2021-05-21 20:49:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:25,658 INFO L93 Difference]: Finished difference Result 298 states and 795 transitions. [2021-05-21 20:49:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:25,658 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 [2021-05-21 20:49:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:25,664 INFO L225 Difference]: With dead ends: 298 [2021-05-21 20:49:25,664 INFO L226 Difference]: Without dead ends: 283 [2021-05-21 20:49:25,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-21 20:49:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-05-21 20:49:25,676 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) [2021-05-21 20:49:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-21 20:49:25,677 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-21 20:49:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:25,677 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-21 20:49:25,677 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) [2021-05-21 20:49:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-21 20:49:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:25,678 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:25,678 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:25,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-21 20:49:25,678 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash 870056290, now seen corresponding path program 3 times [2021-05-21 20:49:25,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:25,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274111507] [2021-05-21 20:49:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:25,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:25,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274111507] [2021-05-21 20:49:25,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274111507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:25,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:25,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:25,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767219443] [2021-05-21 20:49:25,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:25,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:25,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:25,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:25,765 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) [2021-05-21 20:49:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:25,982 INFO L93 Difference]: Finished difference Result 281 states and 763 transitions. [2021-05-21 20:49:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:25,983 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 [2021-05-21 20:49:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:25,984 INFO L225 Difference]: With dead ends: 281 [2021-05-21 20:49:25,984 INFO L226 Difference]: Without dead ends: 266 [2021-05-21 20:49:25,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-21 20:49:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-05-21 20:49:25,989 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) [2021-05-21 20:49:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-21 20:49:25,990 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-21 20:49:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:25,990 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-21 20:49:25,990 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) [2021-05-21 20:49:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-21 20:49:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:25,991 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:25,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:25,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-21 20:49:25,991 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:25,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2059322360, now seen corresponding path program 4 times [2021-05-21 20:49:25,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:25,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56926779] [2021-05-21 20:49:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:26,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:26,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56926779] [2021-05-21 20:49:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56926779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:26,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:26,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:26,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746832709] [2021-05-21 20:49:26,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:26,068 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) [2021-05-21 20:49:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:26,226 INFO L93 Difference]: Finished difference Result 289 states and 784 transitions. [2021-05-21 20:49:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:26,226 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 [2021-05-21 20:49:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:26,228 INFO L225 Difference]: With dead ends: 289 [2021-05-21 20:49:26,229 INFO L226 Difference]: Without dead ends: 274 [2021-05-21 20:49:26,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-21 20:49:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-05-21 20:49:26,233 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) [2021-05-21 20:49:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-21 20:49:26,234 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-21 20:49:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:26,234 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-21 20:49:26,234 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) [2021-05-21 20:49:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-21 20:49:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:26,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:26,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:26,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-21 20:49:26,235 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2033546876, now seen corresponding path program 5 times [2021-05-21 20:49:26,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:26,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575923433] [2021-05-21 20:49:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:26,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:26,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575923433] [2021-05-21 20:49:26,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575923433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:26,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:26,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:26,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331490567] [2021-05-21 20:49:26,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:26,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:26,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:26,329 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) [2021-05-21 20:49:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:26,577 INFO L93 Difference]: Finished difference Result 322 states and 859 transitions. [2021-05-21 20:49:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:26,577 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 [2021-05-21 20:49:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:26,579 INFO L225 Difference]: With dead ends: 322 [2021-05-21 20:49:26,579 INFO L226 Difference]: Without dead ends: 307 [2021-05-21 20:49:26,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-21 20:49:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-05-21 20:49:26,585 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) [2021-05-21 20:49:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-05-21 20:49:26,586 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-05-21 20:49:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:26,586 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-05-21 20:49:26,586 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) [2021-05-21 20:49:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-05-21 20:49:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:26,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:26,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:26,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-21 20:49:26,587 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:26,588 INFO L82 PathProgramCache]: Analyzing trace with hash 334826488, now seen corresponding path program 6 times [2021-05-21 20:49:26,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:26,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754315538] [2021-05-21 20:49:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:26,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:26,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754315538] [2021-05-21 20:49:26,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754315538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:26,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:26,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:26,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722263216] [2021-05-21 20:49:26,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:26,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:26,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:26,664 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) [2021-05-21 20:49:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:26,886 INFO L93 Difference]: Finished difference Result 299 states and 814 transitions. [2021-05-21 20:49:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:26,887 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 [2021-05-21 20:49:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:26,888 INFO L225 Difference]: With dead ends: 299 [2021-05-21 20:49:26,888 INFO L226 Difference]: Without dead ends: 284 [2021-05-21 20:49:26,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-21 20:49:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-05-21 20:49:26,894 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) [2021-05-21 20:49:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-21 20:49:26,895 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-21 20:49:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:26,895 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-21 20:49:26,895 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) [2021-05-21 20:49:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-21 20:49:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:26,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:26,896 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:26,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-21 20:49:26,896 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2035892590, now seen corresponding path program 7 times [2021-05-21 20:49:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:26,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514979574] [2021-05-21 20:49:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:26,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514979574] [2021-05-21 20:49:26,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514979574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:26,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:26,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:26,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306535615] [2021-05-21 20:49:26,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:26,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:26,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:26,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:26,968 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) [2021-05-21 20:49:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:27,167 INFO L93 Difference]: Finished difference Result 389 states and 1040 transitions. [2021-05-21 20:49:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:27,168 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 [2021-05-21 20:49:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:27,169 INFO L225 Difference]: With dead ends: 389 [2021-05-21 20:49:27,169 INFO L226 Difference]: Without dead ends: 374 [2021-05-21 20:49:27,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-21 20:49:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-05-21 20:49:27,175 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) [2021-05-21 20:49:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-05-21 20:49:27,176 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-05-21 20:49:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:27,176 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-05-21 20:49:27,176 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) [2021-05-21 20:49:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-05-21 20:49:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:27,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:27,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:27,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-21 20:49:27,177 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:27,178 INFO L82 PathProgramCache]: Analyzing trace with hash -828339518, now seen corresponding path program 8 times [2021-05-21 20:49:27,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:27,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069198494] [2021-05-21 20:49:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:27,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069198494] [2021-05-21 20:49:27,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069198494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:27,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:27,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:27,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651299813] [2021-05-21 20:49:27,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:27,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:27,250 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) [2021-05-21 20:49:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:27,480 INFO L93 Difference]: Finished difference Result 398 states and 1066 transitions. [2021-05-21 20:49:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:27,480 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 [2021-05-21 20:49:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:27,482 INFO L225 Difference]: With dead ends: 398 [2021-05-21 20:49:27,482 INFO L226 Difference]: Without dead ends: 383 [2021-05-21 20:49:27,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-21 20:49:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-05-21 20:49:27,488 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) [2021-05-21 20:49:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-05-21 20:49:27,489 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-05-21 20:49:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:27,489 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-05-21 20:49:27,489 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) [2021-05-21 20:49:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-05-21 20:49:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:27,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:27,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:27,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-21 20:49:27,490 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:27,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1767907390, now seen corresponding path program 9 times [2021-05-21 20:49:27,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:27,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157071657] [2021-05-21 20:49:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:27,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:27,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157071657] [2021-05-21 20:49:27,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157071657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:27,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:27,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:27,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806259888] [2021-05-21 20:49:27,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:27,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:27,565 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) [2021-05-21 20:49:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:27,821 INFO L93 Difference]: Finished difference Result 405 states and 1082 transitions. [2021-05-21 20:49:27,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:27,821 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 [2021-05-21 20:49:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:27,823 INFO L225 Difference]: With dead ends: 405 [2021-05-21 20:49:27,823 INFO L226 Difference]: Without dead ends: 390 [2021-05-21 20:49:27,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-21 20:49:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-05-21 20:49:27,828 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) [2021-05-21 20:49:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-05-21 20:49:27,829 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-05-21 20:49:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:27,829 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-05-21 20:49:27,829 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) [2021-05-21 20:49:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-05-21 20:49:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:27,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:27,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:27,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-21 20:49:27,830 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:27,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1043349262, now seen corresponding path program 10 times [2021-05-21 20:49:27,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:27,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146323377] [2021-05-21 20:49:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:27,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:27,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146323377] [2021-05-21 20:49:27,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146323377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:27,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:27,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:27,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019839210] [2021-05-21 20:49:27,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:27,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:27,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:27,887 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) [2021-05-21 20:49:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:28,009 INFO L93 Difference]: Finished difference Result 340 states and 918 transitions. [2021-05-21 20:49:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:28,010 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 [2021-05-21 20:49:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:28,012 INFO L225 Difference]: With dead ends: 340 [2021-05-21 20:49:28,012 INFO L226 Difference]: Without dead ends: 325 [2021-05-21 20:49:28,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-21 20:49:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-05-21 20:49:28,017 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) [2021-05-21 20:49:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-05-21 20:49:28,018 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-05-21 20:49:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:28,018 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-05-21 20:49:28,018 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) [2021-05-21 20:49:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-05-21 20:49:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:28,018 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:28,019 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:28,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-21 20:49:28,019 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1480345592, now seen corresponding path program 11 times [2021-05-21 20:49:28,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:28,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065202199] [2021-05-21 20:49:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:28,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065202199] [2021-05-21 20:49:28,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065202199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:28,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:28,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:28,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119130840] [2021-05-21 20:49:28,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:28,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:28,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:28,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:28,082 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) [2021-05-21 20:49:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:28,229 INFO L93 Difference]: Finished difference Result 335 states and 909 transitions. [2021-05-21 20:49:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:28,229 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 [2021-05-21 20:49:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:28,231 INFO L225 Difference]: With dead ends: 335 [2021-05-21 20:49:28,231 INFO L226 Difference]: Without dead ends: 320 [2021-05-21 20:49:28,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-21 20:49:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-05-21 20:49:28,236 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) [2021-05-21 20:49:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-21 20:49:28,237 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-21 20:49:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:28,237 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-21 20:49:28,237 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) [2021-05-21 20:49:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-21 20:49:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:28,238 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:28,238 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:28,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-21 20:49:28,238 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -145439044, now seen corresponding path program 12 times [2021-05-21 20:49:28,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:28,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633471938] [2021-05-21 20:49:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:28,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:28,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633471938] [2021-05-21 20:49:28,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633471938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:28,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:28,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:28,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776693938] [2021-05-21 20:49:28,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:28,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:28,294 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) [2021-05-21 20:49:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:28,435 INFO L93 Difference]: Finished difference Result 318 states and 879 transitions. [2021-05-21 20:49:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:28,436 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 [2021-05-21 20:49:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:28,438 INFO L225 Difference]: With dead ends: 318 [2021-05-21 20:49:28,438 INFO L226 Difference]: Without dead ends: 303 [2021-05-21 20:49:28,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-21 20:49:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-05-21 20:49:28,447 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) [2021-05-21 20:49:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-21 20:49:28,448 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-21 20:49:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:28,449 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-21 20:49:28,449 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) [2021-05-21 20:49:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-21 20:49:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:28,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:28,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:28,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-21 20:49:28,450 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 161256120, now seen corresponding path program 13 times [2021-05-21 20:49:28,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:28,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333436009] [2021-05-21 20:49:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:28,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333436009] [2021-05-21 20:49:28,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333436009] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:28,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:28,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:28,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294451845] [2021-05-21 20:49:28,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:28,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:28,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:28,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:28,525 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) [2021-05-21 20:49:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:28,679 INFO L93 Difference]: Finished difference Result 385 states and 1046 transitions. [2021-05-21 20:49:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:28,679 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 [2021-05-21 20:49:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:28,681 INFO L225 Difference]: With dead ends: 385 [2021-05-21 20:49:28,681 INFO L226 Difference]: Without dead ends: 370 [2021-05-21 20:49:28,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-21 20:49:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-05-21 20:49:28,691 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) [2021-05-21 20:49:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-21 20:49:28,692 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-21 20:49:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:28,692 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-21 20:49:28,692 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) [2021-05-21 20:49:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-21 20:49:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:28,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:28,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:28,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-21 20:49:28,693 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1057379240, now seen corresponding path program 14 times [2021-05-21 20:49:28,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:28,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370116585] [2021-05-21 20:49:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:28,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370116585] [2021-05-21 20:49:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370116585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:28,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:28,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:28,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8931949] [2021-05-21 20:49:28,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:28,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:28,762 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) [2021-05-21 20:49:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:28,925 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-05-21 20:49:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:28,925 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 [2021-05-21 20:49:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:28,927 INFO L225 Difference]: With dead ends: 383 [2021-05-21 20:49:28,927 INFO L226 Difference]: Without dead ends: 368 [2021-05-21 20:49:28,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-21 20:49:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-05-21 20:49:28,932 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) [2021-05-21 20:49:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-21 20:49:28,933 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-21 20:49:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:28,933 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-21 20:49:28,933 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) [2021-05-21 20:49:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-21 20:49:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:28,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:28,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:28,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-21 20:49:28,934 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1150316668, now seen corresponding path program 15 times [2021-05-21 20:49:28,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:28,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480043517] [2021-05-21 20:49:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:28,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:28,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480043517] [2021-05-21 20:49:28,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480043517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:28,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:28,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:28,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103406623] [2021-05-21 20:49:29,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:29,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:29,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:29,000 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) [2021-05-21 20:49:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:29,202 INFO L93 Difference]: Finished difference Result 392 states and 1055 transitions. [2021-05-21 20:49:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:29,203 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 [2021-05-21 20:49:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:29,204 INFO L225 Difference]: With dead ends: 392 [2021-05-21 20:49:29,204 INFO L226 Difference]: Without dead ends: 377 [2021-05-21 20:49:29,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-21 20:49:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-05-21 20:49:29,210 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) [2021-05-21 20:49:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-05-21 20:49:29,210 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-05-21 20:49:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:29,210 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-05-21 20:49:29,211 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) [2021-05-21 20:49:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-05-21 20:49:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:29,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:29,211 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:29,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-21 20:49:29,211 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash -19872328, now seen corresponding path program 16 times [2021-05-21 20:49:29,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:29,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025952443] [2021-05-21 20:49:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:29,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:29,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025952443] [2021-05-21 20:49:29,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025952443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:29,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:29,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:29,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646309368] [2021-05-21 20:49:29,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:29,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:29,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:29,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:29,286 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) [2021-05-21 20:49:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:29,473 INFO L93 Difference]: Finished difference Result 376 states and 1032 transitions. [2021-05-21 20:49:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:29,474 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 [2021-05-21 20:49:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:29,475 INFO L225 Difference]: With dead ends: 376 [2021-05-21 20:49:29,475 INFO L226 Difference]: Without dead ends: 361 [2021-05-21 20:49:29,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-21 20:49:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-05-21 20:49:29,481 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) [2021-05-21 20:49:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-21 20:49:29,481 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-21 20:49:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:29,481 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-21 20:49:29,481 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) [2021-05-21 20:49:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-21 20:49:29,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:29,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:29,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:29,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-21 20:49:29,482 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash -36809380, now seen corresponding path program 17 times [2021-05-21 20:49:29,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:29,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626412956] [2021-05-21 20:49:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:29,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:29,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626412956] [2021-05-21 20:49:29,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626412956] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:29,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:29,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:29,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904392780] [2021-05-21 20:49:29,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:29,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:29,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:29,543 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) [2021-05-21 20:49:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:29,708 INFO L93 Difference]: Finished difference Result 364 states and 991 transitions. [2021-05-21 20:49:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:29,708 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 [2021-05-21 20:49:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:29,710 INFO L225 Difference]: With dead ends: 364 [2021-05-21 20:49:29,710 INFO L226 Difference]: Without dead ends: 349 [2021-05-21 20:49:29,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-21 20:49:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-05-21 20:49:29,715 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) [2021-05-21 20:49:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-05-21 20:49:29,716 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-05-21 20:49:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:29,716 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-05-21 20:49:29,716 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) [2021-05-21 20:49:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-05-21 20:49:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:29,717 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:29,717 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:29,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-21 20:49:29,717 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1103474456, now seen corresponding path program 18 times [2021-05-21 20:49:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:29,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039222041] [2021-05-21 20:49:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:29,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:29,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039222041] [2021-05-21 20:49:29,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039222041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:29,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:29,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:29,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711812785] [2021-05-21 20:49:29,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:29,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:29,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:29,778 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) [2021-05-21 20:49:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:29,948 INFO L93 Difference]: Finished difference Result 343 states and 953 transitions. [2021-05-21 20:49:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:29,948 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 [2021-05-21 20:49:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:29,950 INFO L225 Difference]: With dead ends: 343 [2021-05-21 20:49:29,950 INFO L226 Difference]: Without dead ends: 328 [2021-05-21 20:49:29,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-21 20:49:29,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-05-21 20:49:29,954 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) [2021-05-21 20:49:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-21 20:49:29,955 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-21 20:49:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:29,955 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-21 20:49:29,955 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) [2021-05-21 20:49:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-21 20:49:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:29,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:29,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:29,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-21 20:49:29,956 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:29,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:29,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1622951230, now seen corresponding path program 19 times [2021-05-21 20:49:29,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:29,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909422807] [2021-05-21 20:49:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:30,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:30,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909422807] [2021-05-21 20:49:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909422807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:30,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:30,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:30,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427325707] [2021-05-21 20:49:30,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:30,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:30,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:30,015 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) [2021-05-21 20:49:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:30,115 INFO L93 Difference]: Finished difference Result 360 states and 983 transitions. [2021-05-21 20:49:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:30,116 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 [2021-05-21 20:49:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:30,117 INFO L225 Difference]: With dead ends: 360 [2021-05-21 20:49:30,117 INFO L226 Difference]: Without dead ends: 345 [2021-05-21 20:49:30,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-21 20:49:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-05-21 20:49:30,122 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) [2021-05-21 20:49:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-21 20:49:30,123 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-21 20:49:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:30,123 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-21 20:49:30,123 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) [2021-05-21 20:49:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-21 20:49:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:30,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:30,123 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:30,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-21 20:49:30,124 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:30,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1422092646, now seen corresponding path program 20 times [2021-05-21 20:49:30,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:30,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381336372] [2021-05-21 20:49:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:30,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381336372] [2021-05-21 20:49:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381336372] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:30,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:30,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242178018] [2021-05-21 20:49:30,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:30,180 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) [2021-05-21 20:49:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:30,338 INFO L93 Difference]: Finished difference Result 377 states and 1017 transitions. [2021-05-21 20:49:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:30,339 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 [2021-05-21 20:49:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:30,340 INFO L225 Difference]: With dead ends: 377 [2021-05-21 20:49:30,340 INFO L226 Difference]: Without dead ends: 362 [2021-05-21 20:49:30,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-21 20:49:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-05-21 20:49:30,346 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) [2021-05-21 20:49:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-05-21 20:49:30,346 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-05-21 20:49:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:30,346 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-05-21 20:49:30,347 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) [2021-05-21 20:49:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-05-21 20:49:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:30,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:30,347 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:30,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-21 20:49:30,347 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash 203457286, now seen corresponding path program 21 times [2021-05-21 20:49:30,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:30,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611354701] [2021-05-21 20:49:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:30,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:30,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611354701] [2021-05-21 20:49:30,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611354701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:30,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:30,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:30,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228759505] [2021-05-21 20:49:30,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:30,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:30,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:30,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:30,401 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) [2021-05-21 20:49:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:30,577 INFO L93 Difference]: Finished difference Result 354 states and 972 transitions. [2021-05-21 20:49:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:30,578 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 [2021-05-21 20:49:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:30,579 INFO L225 Difference]: With dead ends: 354 [2021-05-21 20:49:30,579 INFO L226 Difference]: Without dead ends: 339 [2021-05-21 20:49:30,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-21 20:49:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-05-21 20:49:30,584 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) [2021-05-21 20:49:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-21 20:49:30,584 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-21 20:49:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:30,584 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-21 20:49:30,584 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) [2021-05-21 20:49:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-21 20:49:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:30,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:30,585 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:30,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-21 20:49:30,585 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1026845314, now seen corresponding path program 22 times [2021-05-21 20:49:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:30,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029579371] [2021-05-21 20:49:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:30,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029579371] [2021-05-21 20:49:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029579371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:30,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:30,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734572551] [2021-05-21 20:49:30,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:30,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:30,643 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) [2021-05-21 20:49:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:30,843 INFO L93 Difference]: Finished difference Result 409 states and 1106 transitions. [2021-05-21 20:49:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:30,844 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 [2021-05-21 20:49:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:30,845 INFO L225 Difference]: With dead ends: 409 [2021-05-21 20:49:30,845 INFO L226 Difference]: Without dead ends: 394 [2021-05-21 20:49:30,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-21 20:49:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-05-21 20:49:30,850 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) [2021-05-21 20:49:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-05-21 20:49:30,850 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-05-21 20:49:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:30,850 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-05-21 20:49:30,850 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) [2021-05-21 20:49:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-05-21 20:49:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:30,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:30,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:30,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-21 20:49:30,851 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1848016830, now seen corresponding path program 23 times [2021-05-21 20:49:30,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:30,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503238907] [2021-05-21 20:49:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:30,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:30,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503238907] [2021-05-21 20:49:30,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503238907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:30,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:30,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:30,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24594538] [2021-05-21 20:49:30,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:30,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:30,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:30,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:30,932 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) [2021-05-21 20:49:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:31,123 INFO L93 Difference]: Finished difference Result 407 states and 1110 transitions. [2021-05-21 20:49:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:31,124 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 [2021-05-21 20:49:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:31,125 INFO L225 Difference]: With dead ends: 407 [2021-05-21 20:49:31,125 INFO L226 Difference]: Without dead ends: 392 [2021-05-21 20:49:31,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-21 20:49:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-05-21 20:49:31,130 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) [2021-05-21 20:49:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-05-21 20:49:31,131 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-05-21 20:49:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:31,131 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-05-21 20:49:31,131 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) [2021-05-21 20:49:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-05-21 20:49:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:31,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:31,132 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:31,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-21 20:49:31,132 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash 748230078, now seen corresponding path program 24 times [2021-05-21 20:49:31,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:31,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819875013] [2021-05-21 20:49:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:31,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819875013] [2021-05-21 20:49:31,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819875013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:31,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:31,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:31,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18987779] [2021-05-21 20:49:31,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:31,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:31,206 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) [2021-05-21 20:49:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:31,396 INFO L93 Difference]: Finished difference Result 384 states and 1065 transitions. [2021-05-21 20:49:31,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:31,396 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 [2021-05-21 20:49:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:31,397 INFO L225 Difference]: With dead ends: 384 [2021-05-21 20:49:31,397 INFO L226 Difference]: Without dead ends: 369 [2021-05-21 20:49:31,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-21 20:49:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-05-21 20:49:31,402 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) [2021-05-21 20:49:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-21 20:49:31,402 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-21 20:49:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:31,402 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-21 20:49:31,403 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) [2021-05-21 20:49:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-21 20:49:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:31,403 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:31,403 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:31,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-21 20:49:31,403 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:31,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:31,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1951172510, now seen corresponding path program 25 times [2021-05-21 20:49:31,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:31,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309505206] [2021-05-21 20:49:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:31,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:31,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309505206] [2021-05-21 20:49:31,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309505206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:31,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:31,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:31,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360521429] [2021-05-21 20:49:31,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:31,461 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) [2021-05-21 20:49:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:31,608 INFO L93 Difference]: Finished difference Result 403 states and 1103 transitions. [2021-05-21 20:49:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:31,608 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 [2021-05-21 20:49:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:31,610 INFO L225 Difference]: With dead ends: 403 [2021-05-21 20:49:31,610 INFO L226 Difference]: Without dead ends: 388 [2021-05-21 20:49:31,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-21 20:49:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-05-21 20:49:31,615 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) [2021-05-21 20:49:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-21 20:49:31,615 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-21 20:49:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:31,616 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-21 20:49:31,616 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) [2021-05-21 20:49:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-21 20:49:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:31,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:31,616 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:31,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-21 20:49:31,617 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159426, now seen corresponding path program 26 times [2021-05-21 20:49:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:31,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695233719] [2021-05-21 20:49:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:31,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:31,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695233719] [2021-05-21 20:49:31,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695233719] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:31,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:31,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944111067] [2021-05-21 20:49:31,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:31,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:31,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:31,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:31,690 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) [2021-05-21 20:49:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:31,838 INFO L93 Difference]: Finished difference Result 401 states and 1096 transitions. [2021-05-21 20:49:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:31,838 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 [2021-05-21 20:49:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:31,840 INFO L225 Difference]: With dead ends: 401 [2021-05-21 20:49:31,840 INFO L226 Difference]: Without dead ends: 386 [2021-05-21 20:49:31,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-21 20:49:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-05-21 20:49:31,845 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) [2021-05-21 20:49:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-21 20:49:31,845 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-21 20:49:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:31,846 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-21 20:49:31,846 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) [2021-05-21 20:49:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-21 20:49:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:31,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:31,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:31,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-21 20:49:31,847 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -962111962, now seen corresponding path program 27 times [2021-05-21 20:49:31,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:31,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203921931] [2021-05-21 20:49:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:31,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:31,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203921931] [2021-05-21 20:49:31,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203921931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:31,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:31,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:31,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390156636] [2021-05-21 20:49:31,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:31,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:31,917 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) [2021-05-21 20:49:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:32,108 INFO L93 Difference]: Finished difference Result 395 states and 1075 transitions. [2021-05-21 20:49:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:32,108 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 [2021-05-21 20:49:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:32,110 INFO L225 Difference]: With dead ends: 395 [2021-05-21 20:49:32,110 INFO L226 Difference]: Without dead ends: 380 [2021-05-21 20:49:32,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-21 20:49:32,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-05-21 20:49:32,115 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) [2021-05-21 20:49:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-05-21 20:49:32,115 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-05-21 20:49:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:32,116 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-05-21 20:49:32,116 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) [2021-05-21 20:49:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-05-21 20:49:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:32,116 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:32,116 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:32,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-21 20:49:32,117 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2132300958, now seen corresponding path program 28 times [2021-05-21 20:49:32,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:32,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329442329] [2021-05-21 20:49:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:32,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:32,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329442329] [2021-05-21 20:49:32,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329442329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:32,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:32,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:32,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193263115] [2021-05-21 20:49:32,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:32,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:32,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:32,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:32,182 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) [2021-05-21 20:49:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:32,349 INFO L93 Difference]: Finished difference Result 379 states and 1052 transitions. [2021-05-21 20:49:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:32,349 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 [2021-05-21 20:49:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:32,350 INFO L225 Difference]: With dead ends: 379 [2021-05-21 20:49:32,350 INFO L226 Difference]: Without dead ends: 364 [2021-05-21 20:49:32,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-21 20:49:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-05-21 20:49:32,354 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) [2021-05-21 20:49:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-21 20:49:32,355 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-21 20:49:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:32,355 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-21 20:49:32,355 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) [2021-05-21 20:49:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-21 20:49:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:32,356 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:32,356 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:32,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-21 20:49:32,356 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:32,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2145729286, now seen corresponding path program 29 times [2021-05-21 20:49:32,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:32,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144110738] [2021-05-21 20:49:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:32,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:32,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144110738] [2021-05-21 20:49:32,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144110738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:32,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:32,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:32,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105248211] [2021-05-21 20:49:32,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:32,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:32,419 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) [2021-05-21 20:49:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:32,561 INFO L93 Difference]: Finished difference Result 363 states and 1003 transitions. [2021-05-21 20:49:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:32,561 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 [2021-05-21 20:49:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:32,562 INFO L225 Difference]: With dead ends: 363 [2021-05-21 20:49:32,562 INFO L226 Difference]: Without dead ends: 348 [2021-05-21 20:49:32,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-21 20:49:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-05-21 20:49:32,566 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) [2021-05-21 20:49:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-21 20:49:32,567 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-21 20:49:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:32,567 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-21 20:49:32,567 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) [2021-05-21 20:49:32,567 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-21 20:49:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:32,568 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:32,568 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:32,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-21 20:49:32,568 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1008954174, now seen corresponding path program 30 times [2021-05-21 20:49:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:32,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845774709] [2021-05-21 20:49:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:32,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:32,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845774709] [2021-05-21 20:49:32,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845774709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:32,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:32,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:32,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773437038] [2021-05-21 20:49:32,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:32,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:32,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:32,621 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) [2021-05-21 20:49:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:32,772 INFO L93 Difference]: Finished difference Result 342 states and 965 transitions. [2021-05-21 20:49:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:32,772 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 [2021-05-21 20:49:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:32,774 INFO L225 Difference]: With dead ends: 342 [2021-05-21 20:49:32,774 INFO L226 Difference]: Without dead ends: 327 [2021-05-21 20:49:32,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-21 20:49:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-05-21 20:49:32,778 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) [2021-05-21 20:49:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-21 20:49:32,778 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-21 20:49:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:32,779 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-21 20:49:32,779 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) [2021-05-21 20:49:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-21 20:49:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:32,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:32,779 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:32,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-21 20:49:32,779 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1057121422, now seen corresponding path program 31 times [2021-05-21 20:49:32,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:32,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421100217] [2021-05-21 20:49:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:32,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:32,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421100217] [2021-05-21 20:49:32,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421100217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:32,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:32,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:32,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437241759] [2021-05-21 20:49:32,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:32,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:32,853 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) [2021-05-21 20:49:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:33,048 INFO L93 Difference]: Finished difference Result 377 states and 1036 transitions. [2021-05-21 20:49:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:33,049 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 [2021-05-21 20:49:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:33,050 INFO L225 Difference]: With dead ends: 377 [2021-05-21 20:49:33,050 INFO L226 Difference]: Without dead ends: 362 [2021-05-21 20:49:33,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-21 20:49:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-05-21 20:49:33,053 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) [2021-05-21 20:49:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-05-21 20:49:33,054 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-05-21 20:49:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:33,054 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-05-21 20:49:33,054 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) [2021-05-21 20:49:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-05-21 20:49:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:33,055 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:33,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:33,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-21 20:49:33,055 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2030292802, now seen corresponding path program 32 times [2021-05-21 20:49:33,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:33,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629658422] [2021-05-21 20:49:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:33,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629658422] [2021-05-21 20:49:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629658422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:33,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:33,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230984281] [2021-05-21 20:49:33,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:33,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:33,118 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) [2021-05-21 20:49:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:33,334 INFO L93 Difference]: Finished difference Result 386 states and 1062 transitions. [2021-05-21 20:49:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:33,334 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 [2021-05-21 20:49:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:33,335 INFO L225 Difference]: With dead ends: 386 [2021-05-21 20:49:33,335 INFO L226 Difference]: Without dead ends: 371 [2021-05-21 20:49:33,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-21 20:49:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-05-21 20:49:33,340 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) [2021-05-21 20:49:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-05-21 20:49:33,340 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-05-21 20:49:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:33,340 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-05-21 20:49:33,341 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) [2021-05-21 20:49:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-05-21 20:49:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:33,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:33,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:33,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-21 20:49:33,341 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash 565954106, now seen corresponding path program 33 times [2021-05-21 20:49:33,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:33,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868544227] [2021-05-21 20:49:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:33,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868544227] [2021-05-21 20:49:33,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868544227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:33,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:33,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:33,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560244382] [2021-05-21 20:49:33,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:33,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:33,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:33,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:33,406 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) [2021-05-21 20:49:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:33,616 INFO L93 Difference]: Finished difference Result 393 states and 1078 transitions. [2021-05-21 20:49:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:33,616 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 [2021-05-21 20:49:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:33,618 INFO L225 Difference]: With dead ends: 393 [2021-05-21 20:49:33,618 INFO L226 Difference]: Without dead ends: 378 [2021-05-21 20:49:33,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-21 20:49:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-05-21 20:49:33,622 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) [2021-05-21 20:49:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-21 20:49:33,622 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-21 20:49:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:33,622 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-21 20:49:33,623 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) [2021-05-21 20:49:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-21 20:49:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:33,623 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:33,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:33,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-21 20:49:33,623 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2049664750, now seen corresponding path program 34 times [2021-05-21 20:49:33,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:33,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563483633] [2021-05-21 20:49:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:33,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:33,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563483633] [2021-05-21 20:49:33,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563483633] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:33,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:33,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927277982] [2021-05-21 20:49:33,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:33,680 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) [2021-05-21 20:49:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:33,803 INFO L93 Difference]: Finished difference Result 438 states and 1184 transitions. [2021-05-21 20:49:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:33,804 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 [2021-05-21 20:49:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:33,805 INFO L225 Difference]: With dead ends: 438 [2021-05-21 20:49:33,805 INFO L226 Difference]: Without dead ends: 423 [2021-05-21 20:49:33,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-21 20:49:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-05-21 20:49:33,809 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) [2021-05-21 20:49:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-05-21 20:49:33,810 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-05-21 20:49:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:33,810 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-05-21 20:49:33,810 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) [2021-05-21 20:49:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-05-21 20:49:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:33,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:33,810 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:33,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-21 20:49:33,810 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:33,811 INFO L82 PathProgramCache]: Analyzing trace with hash 278392308, now seen corresponding path program 35 times [2021-05-21 20:49:33,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:33,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608858608] [2021-05-21 20:49:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:33,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:33,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608858608] [2021-05-21 20:49:33,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608858608] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:33,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:33,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:33,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354475147] [2021-05-21 20:49:33,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:33,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:33,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:33,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:33,868 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) [2021-05-21 20:49:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:34,010 INFO L93 Difference]: Finished difference Result 433 states and 1175 transitions. [2021-05-21 20:49:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:34,010 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 [2021-05-21 20:49:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:34,011 INFO L225 Difference]: With dead ends: 433 [2021-05-21 20:49:34,012 INFO L226 Difference]: Without dead ends: 418 [2021-05-21 20:49:34,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-21 20:49:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-05-21 20:49:34,016 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) [2021-05-21 20:49:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-05-21 20:49:34,016 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-05-21 20:49:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:34,017 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-05-21 20:49:34,017 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) [2021-05-21 20:49:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-05-21 20:49:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:34,017 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:34,017 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:34,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-21 20:49:34,017 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1347392328, now seen corresponding path program 36 times [2021-05-21 20:49:34,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:34,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177285023] [2021-05-21 20:49:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:34,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177285023] [2021-05-21 20:49:34,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177285023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:34,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:34,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:34,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166958035] [2021-05-21 20:49:34,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:34,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:34,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:34,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:34,084 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) [2021-05-21 20:49:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:34,241 INFO L93 Difference]: Finished difference Result 416 states and 1145 transitions. [2021-05-21 20:49:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:34,241 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 [2021-05-21 20:49:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:34,243 INFO L225 Difference]: With dead ends: 416 [2021-05-21 20:49:34,243 INFO L226 Difference]: Without dead ends: 401 [2021-05-21 20:49:34,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-21 20:49:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-05-21 20:49:34,247 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) [2021-05-21 20:49:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-21 20:49:34,248 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-21 20:49:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:34,248 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-21 20:49:34,248 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) [2021-05-21 20:49:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-21 20:49:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:34,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:34,249 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:34,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-21 20:49:34,249 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1040697164, now seen corresponding path program 37 times [2021-05-21 20:49:34,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:34,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108493740] [2021-05-21 20:49:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:34,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108493740] [2021-05-21 20:49:34,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108493740] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:34,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:34,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:34,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63984377] [2021-05-21 20:49:34,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:34,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:34,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:34,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:34,313 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) [2021-05-21 20:49:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:34,445 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-21 20:49:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:34,446 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 [2021-05-21 20:49:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:34,447 INFO L225 Difference]: With dead ends: 437 [2021-05-21 20:49:34,447 INFO L226 Difference]: Without dead ends: 422 [2021-05-21 20:49:34,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-21 20:49:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-05-21 20:49:34,451 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) [2021-05-21 20:49:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-21 20:49:34,452 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-21 20:49:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:34,452 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-21 20:49:34,452 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) [2021-05-21 20:49:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-21 20:49:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:34,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:34,453 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:34,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-21 20:49:34,453 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2035634772, now seen corresponding path program 38 times [2021-05-21 20:49:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:34,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482203937] [2021-05-21 20:49:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:34,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:34,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482203937] [2021-05-21 20:49:34,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482203937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:34,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:34,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:34,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216232353] [2021-05-21 20:49:34,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:34,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:34,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:34,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:34,511 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) [2021-05-21 20:49:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:34,651 INFO L93 Difference]: Finished difference Result 435 states and 1194 transitions. [2021-05-21 20:49:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:34,652 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 [2021-05-21 20:49:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:34,653 INFO L225 Difference]: With dead ends: 435 [2021-05-21 20:49:34,653 INFO L226 Difference]: Without dead ends: 420 [2021-05-21 20:49:34,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-21 20:49:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-05-21 20:49:34,658 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) [2021-05-21 20:49:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-21 20:49:34,659 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-21 20:49:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:34,659 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-21 20:49:34,659 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) [2021-05-21 20:49:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-21 20:49:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:34,659 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:34,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:34,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-21 20:49:34,660 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:34,660 INFO L82 PathProgramCache]: Analyzing trace with hash -51636616, now seen corresponding path program 39 times [2021-05-21 20:49:34,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:34,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909830237] [2021-05-21 20:49:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:34,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:34,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909830237] [2021-05-21 20:49:34,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909830237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:34,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:34,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:34,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417877820] [2021-05-21 20:49:34,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:34,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:34,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:34,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:34,720 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) [2021-05-21 20:49:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:34,897 INFO L93 Difference]: Finished difference Result 468 states and 1258 transitions. [2021-05-21 20:49:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:34,897 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 [2021-05-21 20:49:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:34,899 INFO L225 Difference]: With dead ends: 468 [2021-05-21 20:49:34,899 INFO L226 Difference]: Without dead ends: 453 [2021-05-21 20:49:34,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-21 20:49:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-05-21 20:49:34,904 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) [2021-05-21 20:49:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-05-21 20:49:34,905 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-05-21 20:49:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:34,905 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-05-21 20:49:34,905 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) [2021-05-21 20:49:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-05-21 20:49:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:34,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:34,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:34,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-21 20:49:34,906 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1221825612, now seen corresponding path program 40 times [2021-05-21 20:49:34,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:34,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401049748] [2021-05-21 20:49:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:34,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:34,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401049748] [2021-05-21 20:49:34,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401049748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:34,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:34,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:34,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404849457] [2021-05-21 20:49:34,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:34,971 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) [2021-05-21 20:49:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:35,129 INFO L93 Difference]: Finished difference Result 452 states and 1235 transitions. [2021-05-21 20:49:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:35,130 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 [2021-05-21 20:49:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:35,131 INFO L225 Difference]: With dead ends: 452 [2021-05-21 20:49:35,131 INFO L226 Difference]: Without dead ends: 437 [2021-05-21 20:49:35,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-21 20:49:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-05-21 20:49:35,136 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) [2021-05-21 20:49:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-21 20:49:35,136 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-21 20:49:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:35,136 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-21 20:49:35,136 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) [2021-05-21 20:49:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-21 20:49:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:35,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:35,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:35,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-21 20:49:35,137 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1238762664, now seen corresponding path program 41 times [2021-05-21 20:49:35,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:35,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466459610] [2021-05-21 20:49:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:35,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:35,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466459610] [2021-05-21 20:49:35,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466459610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:35,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:35,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:35,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062252009] [2021-05-21 20:49:35,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:35,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:35,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:35,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:35,194 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) [2021-05-21 20:49:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:35,323 INFO L93 Difference]: Finished difference Result 446 states and 1215 transitions. [2021-05-21 20:49:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:35,323 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 [2021-05-21 20:49:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:35,324 INFO L225 Difference]: With dead ends: 446 [2021-05-21 20:49:35,324 INFO L226 Difference]: Without dead ends: 431 [2021-05-21 20:49:35,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-21 20:49:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-05-21 20:49:35,344 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) [2021-05-21 20:49:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-21 20:49:35,345 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-21 20:49:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:35,345 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-21 20:49:35,345 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) [2021-05-21 20:49:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-21 20:49:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:35,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:35,346 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:35,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-21 20:49:35,346 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash -98478828, now seen corresponding path program 42 times [2021-05-21 20:49:35,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:35,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262957315] [2021-05-21 20:49:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:35,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:35,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262957315] [2021-05-21 20:49:35,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262957315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:35,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:35,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:35,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085087371] [2021-05-21 20:49:35,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:35,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:35,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:35,407 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) [2021-05-21 20:49:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:35,549 INFO L93 Difference]: Finished difference Result 425 states and 1177 transitions. [2021-05-21 20:49:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:35,550 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 [2021-05-21 20:49:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:35,551 INFO L225 Difference]: With dead ends: 425 [2021-05-21 20:49:35,551 INFO L226 Difference]: Without dead ends: 410 [2021-05-21 20:49:35,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-21 20:49:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-05-21 20:49:35,556 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) [2021-05-21 20:49:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-05-21 20:49:35,556 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-05-21 20:49:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:35,557 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-05-21 20:49:35,557 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) [2021-05-21 20:49:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-05-21 20:49:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:35,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:35,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:35,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-21 20:49:35,558 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash -485249606, now seen corresponding path program 43 times [2021-05-21 20:49:35,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:35,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037488167] [2021-05-21 20:49:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:35,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037488167] [2021-05-21 20:49:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037488167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:35,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:35,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:35,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930343952] [2021-05-21 20:49:35,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:35,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:35,615 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) [2021-05-21 20:49:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:35,741 INFO L93 Difference]: Finished difference Result 323 states and 889 transitions. [2021-05-21 20:49:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:35,742 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 [2021-05-21 20:49:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:35,742 INFO L225 Difference]: With dead ends: 323 [2021-05-21 20:49:35,742 INFO L226 Difference]: Without dead ends: 308 [2021-05-21 20:49:35,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-21 20:49:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-05-21 20:49:35,746 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) [2021-05-21 20:49:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-05-21 20:49:35,747 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-05-21 20:49:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:35,747 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-05-21 20:49:35,747 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) [2021-05-21 20:49:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-05-21 20:49:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:35,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:35,748 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:35,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-21 20:49:35,748 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:35,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2038445248, now seen corresponding path program 44 times [2021-05-21 20:49:35,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:35,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731586104] [2021-05-21 20:49:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:35,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:35,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731586104] [2021-05-21 20:49:35,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731586104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:35,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:35,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:35,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190139035] [2021-05-21 20:49:35,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:35,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:35,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:35,805 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) [2021-05-21 20:49:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:35,957 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-21 20:49:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:35,957 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 [2021-05-21 20:49:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:35,958 INFO L225 Difference]: With dead ends: 353 [2021-05-21 20:49:35,958 INFO L226 Difference]: Without dead ends: 338 [2021-05-21 20:49:35,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-21 20:49:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-05-21 20:49:35,961 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) [2021-05-21 20:49:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-05-21 20:49:35,961 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-05-21 20:49:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:35,961 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-05-21 20:49:35,961 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) [2021-05-21 20:49:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-05-21 20:49:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:35,962 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:35,962 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:35,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-21 20:49:35,962 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:35,962 INFO L82 PathProgramCache]: Analyzing trace with hash 412660612, now seen corresponding path program 45 times [2021-05-21 20:49:35,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:35,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356552642] [2021-05-21 20:49:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:36,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:36,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356552642] [2021-05-21 20:49:36,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356552642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:36,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:36,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:36,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494753752] [2021-05-21 20:49:36,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:36,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:36,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:36,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:36,022 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) [2021-05-21 20:49:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:36,179 INFO L93 Difference]: Finished difference Result 336 states and 921 transitions. [2021-05-21 20:49:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:36,179 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 [2021-05-21 20:49:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:36,180 INFO L225 Difference]: With dead ends: 336 [2021-05-21 20:49:36,180 INFO L226 Difference]: Without dead ends: 321 [2021-05-21 20:49:36,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-21 20:49:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-05-21 20:49:36,183 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) [2021-05-21 20:49:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-05-21 20:49:36,183 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-05-21 20:49:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:36,183 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-05-21 20:49:36,183 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) [2021-05-21 20:49:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-05-21 20:49:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:36,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:36,184 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:36,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-21 20:49:36,184 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:36,184 INFO L82 PathProgramCache]: Analyzing trace with hash 379489126, now seen corresponding path program 46 times [2021-05-21 20:49:36,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:36,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272978625] [2021-05-21 20:49:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:36,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:36,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272978625] [2021-05-21 20:49:36,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272978625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:36,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:36,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:36,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795570156] [2021-05-21 20:49:36,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:36,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:36,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:36,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:36,245 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) [2021-05-21 20:49:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:36,370 INFO L93 Difference]: Finished difference Result 324 states and 889 transitions. [2021-05-21 20:49:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:36,370 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 [2021-05-21 20:49:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:36,371 INFO L225 Difference]: With dead ends: 324 [2021-05-21 20:49:36,371 INFO L226 Difference]: Without dead ends: 309 [2021-05-21 20:49:36,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-21 20:49:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-05-21 20:49:36,375 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) [2021-05-21 20:49:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-21 20:49:36,375 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-21 20:49:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:36,375 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-21 20:49:36,375 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) [2021-05-21 20:49:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-21 20:49:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:36,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:36,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:36,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-21 20:49:36,376 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:36,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1252190110, now seen corresponding path program 47 times [2021-05-21 20:49:36,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:36,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191640703] [2021-05-21 20:49:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:36,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:36,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191640703] [2021-05-21 20:49:36,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191640703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:36,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:36,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:36,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596931822] [2021-05-21 20:49:36,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:36,429 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) [2021-05-21 20:49:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:36,576 INFO L93 Difference]: Finished difference Result 354 states and 954 transitions. [2021-05-21 20:49:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:36,576 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 [2021-05-21 20:49:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:36,577 INFO L225 Difference]: With dead ends: 354 [2021-05-21 20:49:36,577 INFO L226 Difference]: Without dead ends: 339 [2021-05-21 20:49:36,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-21 20:49:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-05-21 20:49:36,580 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) [2021-05-21 20:49:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-05-21 20:49:36,581 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-05-21 20:49:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:36,581 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-05-21 20:49:36,581 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) [2021-05-21 20:49:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-05-21 20:49:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:36,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:36,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:36,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-21 20:49:36,582 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1416992550, now seen corresponding path program 48 times [2021-05-21 20:49:36,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:36,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670770014] [2021-05-21 20:49:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:36,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:36,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670770014] [2021-05-21 20:49:36,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670770014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:36,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:36,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735795005] [2021-05-21 20:49:36,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:36,636 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) [2021-05-21 20:49:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:36,773 INFO L93 Difference]: Finished difference Result 333 states and 916 transitions. [2021-05-21 20:49:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:36,773 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 [2021-05-21 20:49:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:36,774 INFO L225 Difference]: With dead ends: 333 [2021-05-21 20:49:36,774 INFO L226 Difference]: Without dead ends: 318 [2021-05-21 20:49:36,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-21 20:49:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-05-21 20:49:36,777 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) [2021-05-21 20:49:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-21 20:49:36,778 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-21 20:49:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:36,778 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-21 20:49:36,778 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) [2021-05-21 20:49:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-21 20:49:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:36,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:36,779 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:36,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-21 20:49:36,779 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash -167418646, now seen corresponding path program 49 times [2021-05-21 20:49:36,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:36,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750921093] [2021-05-21 20:49:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:36,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:36,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750921093] [2021-05-21 20:49:36,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750921093] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:36,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:36,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:36,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094146803] [2021-05-21 20:49:36,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:36,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:36,857 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) [2021-05-21 20:49:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:37,003 INFO L93 Difference]: Finished difference Result 386 states and 1068 transitions. [2021-05-21 20:49:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:37,003 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 [2021-05-21 20:49:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:37,004 INFO L225 Difference]: With dead ends: 386 [2021-05-21 20:49:37,004 INFO L226 Difference]: Without dead ends: 371 [2021-05-21 20:49:37,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-21 20:49:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-05-21 20:49:37,008 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) [2021-05-21 20:49:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-05-21 20:49:37,008 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-05-21 20:49:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:37,009 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-05-21 20:49:37,009 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) [2021-05-21 20:49:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-05-21 20:49:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:37,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:37,009 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:37,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-21 20:49:37,010 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1386054006, now seen corresponding path program 50 times [2021-05-21 20:49:37,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:37,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287737730] [2021-05-21 20:49:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:37,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:37,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287737730] [2021-05-21 20:49:37,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287737730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:37,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:37,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:37,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803993633] [2021-05-21 20:49:37,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:37,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:37,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:37,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:37,076 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) [2021-05-21 20:49:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:37,223 INFO L93 Difference]: Finished difference Result 390 states and 1074 transitions. [2021-05-21 20:49:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:37,224 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 [2021-05-21 20:49:37,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:37,225 INFO L225 Difference]: With dead ends: 390 [2021-05-21 20:49:37,225 INFO L226 Difference]: Without dead ends: 375 [2021-05-21 20:49:37,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-21 20:49:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-05-21 20:49:37,227 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) [2021-05-21 20:49:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-21 20:49:37,228 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-21 20:49:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:37,228 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-21 20:49:37,228 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) [2021-05-21 20:49:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-21 20:49:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:37,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:37,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:37,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-21 20:49:37,229 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash -310342850, now seen corresponding path program 51 times [2021-05-21 20:49:37,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:37,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711721402] [2021-05-21 20:49:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:37,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711721402] [2021-05-21 20:49:37,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711721402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:37,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:37,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:37,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683499485] [2021-05-21 20:49:37,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:37,293 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) [2021-05-21 20:49:37,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:37,392 INFO L93 Difference]: Finished difference Result 386 states and 1060 transitions. [2021-05-21 20:49:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:37,392 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 [2021-05-21 20:49:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:37,393 INFO L225 Difference]: With dead ends: 386 [2021-05-21 20:49:37,393 INFO L226 Difference]: Without dead ends: 371 [2021-05-21 20:49:37,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-21 20:49:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-05-21 20:49:37,397 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) [2021-05-21 20:49:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-21 20:49:37,398 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-21 20:49:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:37,398 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-21 20:49:37,398 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) [2021-05-21 20:49:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-21 20:49:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:37,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:37,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:37,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-21 20:49:37,399 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash -548101402, now seen corresponding path program 52 times [2021-05-21 20:49:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:37,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721013267] [2021-05-21 20:49:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:37,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:37,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721013267] [2021-05-21 20:49:37,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721013267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:37,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:37,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:37,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384704254] [2021-05-21 20:49:37,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:37,453 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) [2021-05-21 20:49:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:37,581 INFO L93 Difference]: Finished difference Result 464 states and 1256 transitions. [2021-05-21 20:49:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:37,581 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 [2021-05-21 20:49:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:37,582 INFO L225 Difference]: With dead ends: 464 [2021-05-21 20:49:37,582 INFO L226 Difference]: Without dead ends: 449 [2021-05-21 20:49:37,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-21 20:49:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-05-21 20:49:37,586 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) [2021-05-21 20:49:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-21 20:49:37,586 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-21 20:49:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:37,586 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-21 20:49:37,586 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) [2021-05-21 20:49:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-21 20:49:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:37,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:37,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:37,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-21 20:49:37,587 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1766736762, now seen corresponding path program 53 times [2021-05-21 20:49:37,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:37,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821686739] [2021-05-21 20:49:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:37,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:37,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821686739] [2021-05-21 20:49:37,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821686739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:37,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:37,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:37,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383242859] [2021-05-21 20:49:37,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:37,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:37,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:37,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:37,642 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) [2021-05-21 20:49:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:37,782 INFO L93 Difference]: Finished difference Result 468 states and 1262 transitions. [2021-05-21 20:49:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:37,782 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 [2021-05-21 20:49:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:37,783 INFO L225 Difference]: With dead ends: 468 [2021-05-21 20:49:37,783 INFO L226 Difference]: Without dead ends: 453 [2021-05-21 20:49:37,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-21 20:49:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-05-21 20:49:37,787 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) [2021-05-21 20:49:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-21 20:49:37,787 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-21 20:49:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:37,788 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-21 20:49:37,788 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) [2021-05-21 20:49:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-21 20:49:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:37,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:37,788 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:37,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-21 20:49:37,789 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:37,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:37,789 INFO L82 PathProgramCache]: Analyzing trace with hash 440959146, now seen corresponding path program 54 times [2021-05-21 20:49:37,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:37,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014615639] [2021-05-21 20:49:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:37,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:37,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014615639] [2021-05-21 20:49:37,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014615639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:37,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:37,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252678458] [2021-05-21 20:49:37,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:37,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:37,845 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) [2021-05-21 20:49:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:37,995 INFO L93 Difference]: Finished difference Result 431 states and 1182 transitions. [2021-05-21 20:49:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:37,995 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 [2021-05-21 20:49:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:37,996 INFO L225 Difference]: With dead ends: 431 [2021-05-21 20:49:37,996 INFO L226 Difference]: Without dead ends: 416 [2021-05-21 20:49:37,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-21 20:49:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-05-21 20:49:38,000 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) [2021-05-21 20:49:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-05-21 20:49:38,000 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-05-21 20:49:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:38,000 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-05-21 20:49:38,000 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) [2021-05-21 20:49:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-05-21 20:49:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:38,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:38,001 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:38,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-21 20:49:38,001 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash -729229850, now seen corresponding path program 55 times [2021-05-21 20:49:38,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:38,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296205377] [2021-05-21 20:49:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:38,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:38,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296205377] [2021-05-21 20:49:38,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296205377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:38,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:38,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:38,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349739055] [2021-05-21 20:49:38,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:38,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:38,062 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) [2021-05-21 20:49:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:38,241 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-05-21 20:49:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:38,241 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 [2021-05-21 20:49:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:38,242 INFO L225 Difference]: With dead ends: 415 [2021-05-21 20:49:38,242 INFO L226 Difference]: Without dead ends: 400 [2021-05-21 20:49:38,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-21 20:49:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-05-21 20:49:38,245 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) [2021-05-21 20:49:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-21 20:49:38,245 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-21 20:49:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:38,245 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-21 20:49:38,246 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) [2021-05-21 20:49:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-21 20:49:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:38,246 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:38,246 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:38,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-21 20:49:38,246 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:38,246 INFO L82 PathProgramCache]: Analyzing trace with hash -746166902, now seen corresponding path program 56 times [2021-05-21 20:49:38,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:38,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422700882] [2021-05-21 20:49:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:38,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:38,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422700882] [2021-05-21 20:49:38,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422700882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:38,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:38,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:38,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138818857] [2021-05-21 20:49:38,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:38,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:38,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:38,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:38,305 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) [2021-05-21 20:49:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:38,439 INFO L93 Difference]: Finished difference Result 449 states and 1229 transitions. [2021-05-21 20:49:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:38,439 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 [2021-05-21 20:49:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:38,440 INFO L225 Difference]: With dead ends: 449 [2021-05-21 20:49:38,440 INFO L226 Difference]: Without dead ends: 434 [2021-05-21 20:49:38,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-21 20:49:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-05-21 20:49:38,443 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) [2021-05-21 20:49:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-21 20:49:38,444 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-21 20:49:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:38,444 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-21 20:49:38,444 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) [2021-05-21 20:49:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-21 20:49:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:38,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:38,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:38,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-21 20:49:38,445 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash 394116934, now seen corresponding path program 57 times [2021-05-21 20:49:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:38,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403996438] [2021-05-21 20:49:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:38,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:38,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403996438] [2021-05-21 20:49:38,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403996438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:38,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:38,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:38,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434179680] [2021-05-21 20:49:38,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:38,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:38,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:38,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:38,497 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) [2021-05-21 20:49:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:38,654 INFO L93 Difference]: Finished difference Result 428 states and 1191 transitions. [2021-05-21 20:49:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:38,654 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 [2021-05-21 20:49:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:38,655 INFO L225 Difference]: With dead ends: 428 [2021-05-21 20:49:38,655 INFO L226 Difference]: Without dead ends: 413 [2021-05-21 20:49:38,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-21 20:49:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-05-21 20:49:38,658 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) [2021-05-21 20:49:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-21 20:49:38,659 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-21 20:49:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:38,659 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-21 20:49:38,659 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) [2021-05-21 20:49:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-21 20:49:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:38,660 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:38,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:38,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-21 20:49:38,661 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1262551738, now seen corresponding path program 58 times [2021-05-21 20:49:38,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:38,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837113935] [2021-05-21 20:49:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:38,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837113935] [2021-05-21 20:49:38,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837113935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:38,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:38,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:38,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726768203] [2021-05-21 20:49:38,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:38,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:38,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:38,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:38,722 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) [2021-05-21 20:49:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:38,832 INFO L93 Difference]: Finished difference Result 429 states and 1161 transitions. [2021-05-21 20:49:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:38,832 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 [2021-05-21 20:49:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:38,833 INFO L225 Difference]: With dead ends: 429 [2021-05-21 20:49:38,833 INFO L226 Difference]: Without dead ends: 414 [2021-05-21 20:49:38,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-21 20:49:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-05-21 20:49:38,836 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) [2021-05-21 20:49:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-05-21 20:49:38,837 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-05-21 20:49:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:38,837 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-05-21 20:49:38,837 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) [2021-05-21 20:49:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-05-21 20:49:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:38,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:38,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:38,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-21 20:49:38,838 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2074864322, now seen corresponding path program 59 times [2021-05-21 20:49:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:38,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348966672] [2021-05-21 20:49:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:38,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:38,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348966672] [2021-05-21 20:49:38,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348966672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:38,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:38,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:38,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802807036] [2021-05-21 20:49:38,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:38,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:38,897 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) [2021-05-21 20:49:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:39,046 INFO L93 Difference]: Finished difference Result 430 states and 1172 transitions. [2021-05-21 20:49:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:39,046 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 [2021-05-21 20:49:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:39,047 INFO L225 Difference]: With dead ends: 430 [2021-05-21 20:49:39,047 INFO L226 Difference]: Without dead ends: 415 [2021-05-21 20:49:39,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-21 20:49:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-05-21 20:49:39,051 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) [2021-05-21 20:49:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-05-21 20:49:39,052 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-05-21 20:49:39,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:39,052 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-05-21 20:49:39,052 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) [2021-05-21 20:49:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-05-21 20:49:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:39,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:39,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:39,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-21 20:49:39,053 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash -934580486, now seen corresponding path program 60 times [2021-05-21 20:49:39,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:39,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919996479] [2021-05-21 20:49:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:39,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:39,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919996479] [2021-05-21 20:49:39,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919996479] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:39,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:39,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:39,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835005747] [2021-05-21 20:49:39,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:39,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:39,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:39,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:39,104 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) [2021-05-21 20:49:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:39,231 INFO L93 Difference]: Finished difference Result 409 states and 1134 transitions. [2021-05-21 20:49:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:39,232 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 [2021-05-21 20:49:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:39,232 INFO L225 Difference]: With dead ends: 409 [2021-05-21 20:49:39,232 INFO L226 Difference]: Without dead ends: 394 [2021-05-21 20:49:39,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-21 20:49:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-05-21 20:49:39,235 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) [2021-05-21 20:49:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-21 20:49:39,236 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-21 20:49:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:39,236 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-21 20:49:39,236 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) [2021-05-21 20:49:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-21 20:49:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:39,236 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:39,236 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:39,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-21 20:49:39,237 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -674451760, now seen corresponding path program 61 times [2021-05-21 20:49:39,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:39,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177689305] [2021-05-21 20:49:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:39,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:39,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177689305] [2021-05-21 20:49:39,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177689305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:39,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:39,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:39,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584500651] [2021-05-21 20:49:39,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:39,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:39,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:39,290 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) [2021-05-21 20:49:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:39,392 INFO L93 Difference]: Finished difference Result 328 states and 903 transitions. [2021-05-21 20:49:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:39,392 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 [2021-05-21 20:49:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:39,393 INFO L225 Difference]: With dead ends: 328 [2021-05-21 20:49:39,393 INFO L226 Difference]: Without dead ends: 313 [2021-05-21 20:49:39,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-21 20:49:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-05-21 20:49:39,396 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) [2021-05-21 20:49:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-21 20:49:39,396 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-21 20:49:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:39,396 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-21 20:49:39,396 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) [2021-05-21 20:49:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-21 20:49:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:39,397 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:39,397 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:39,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-21 20:49:39,397 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1924375180, now seen corresponding path program 62 times [2021-05-21 20:49:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:39,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903547655] [2021-05-21 20:49:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:39,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:39,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903547655] [2021-05-21 20:49:39,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903547655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:39,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:39,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:39,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980438062] [2021-05-21 20:49:39,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:39,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:39,451 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) [2021-05-21 20:49:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:39,615 INFO L93 Difference]: Finished difference Result 357 states and 963 transitions. [2021-05-21 20:49:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:39,616 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 [2021-05-21 20:49:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:39,616 INFO L225 Difference]: With dead ends: 357 [2021-05-21 20:49:39,616 INFO L226 Difference]: Without dead ends: 342 [2021-05-21 20:49:39,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-21 20:49:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-05-21 20:49:39,619 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) [2021-05-21 20:49:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-21 20:49:39,620 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-21 20:49:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:39,620 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-21 20:49:39,620 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) [2021-05-21 20:49:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-21 20:49:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:39,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:39,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:39,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-21 20:49:39,621 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1151956756, now seen corresponding path program 63 times [2021-05-21 20:49:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:39,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151765980] [2021-05-21 20:49:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:39,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:39,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151765980] [2021-05-21 20:49:39,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151765980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:39,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:39,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:39,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785221738] [2021-05-21 20:49:39,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:39,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:39,684 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) [2021-05-21 20:49:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:39,856 INFO L93 Difference]: Finished difference Result 334 states and 918 transitions. [2021-05-21 20:49:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:39,857 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 [2021-05-21 20:49:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:39,857 INFO L225 Difference]: With dead ends: 334 [2021-05-21 20:49:39,858 INFO L226 Difference]: Without dead ends: 319 [2021-05-21 20:49:39,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-21 20:49:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-05-21 20:49:39,861 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) [2021-05-21 20:49:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-21 20:49:39,862 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-21 20:49:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:39,862 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-21 20:49:39,862 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) [2021-05-21 20:49:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-21 20:49:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:39,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:39,863 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:39,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-21 20:49:39,863 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash 263807996, now seen corresponding path program 64 times [2021-05-21 20:49:39,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:39,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234372548] [2021-05-21 20:49:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:39,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:39,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234372548] [2021-05-21 20:49:39,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234372548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:39,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:39,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:39,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172307491] [2021-05-21 20:49:39,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:39,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:39,914 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) [2021-05-21 20:49:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:40,057 INFO L93 Difference]: Finished difference Result 349 states and 945 transitions. [2021-05-21 20:49:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:40,057 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 [2021-05-21 20:49:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:40,058 INFO L225 Difference]: With dead ends: 349 [2021-05-21 20:49:40,058 INFO L226 Difference]: Without dead ends: 334 [2021-05-21 20:49:40,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-21 20:49:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-05-21 20:49:40,065 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) [2021-05-21 20:49:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-21 20:49:40,066 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-21 20:49:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:40,066 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-21 20:49:40,066 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) [2021-05-21 20:49:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-21 20:49:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:40,066 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:40,066 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:40,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-21 20:49:40,067 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:40,067 INFO L82 PathProgramCache]: Analyzing trace with hash -954827364, now seen corresponding path program 65 times [2021-05-21 20:49:40,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:40,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052750779] [2021-05-21 20:49:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:40,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:40,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052750779] [2021-05-21 20:49:40,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052750779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:40,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:40,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:40,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532447299] [2021-05-21 20:49:40,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:40,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:40,130 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) [2021-05-21 20:49:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:40,291 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-21 20:49:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:40,291 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 [2021-05-21 20:49:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:40,292 INFO L225 Difference]: With dead ends: 353 [2021-05-21 20:49:40,292 INFO L226 Difference]: Without dead ends: 338 [2021-05-21 20:49:40,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-21 20:49:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-05-21 20:49:40,295 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) [2021-05-21 20:49:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-21 20:49:40,296 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-21 20:49:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:40,296 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-21 20:49:40,296 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) [2021-05-21 20:49:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-21 20:49:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:40,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:40,297 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:40,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-21 20:49:40,297 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash 120883792, now seen corresponding path program 66 times [2021-05-21 20:49:40,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:40,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062989866] [2021-05-21 20:49:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:40,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:40,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062989866] [2021-05-21 20:49:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062989866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:40,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:40,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:40,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79175071] [2021-05-21 20:49:40,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:40,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:40,366 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) [2021-05-21 20:49:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:40,472 INFO L93 Difference]: Finished difference Result 324 states and 891 transitions. [2021-05-21 20:49:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:40,473 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 [2021-05-21 20:49:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:40,473 INFO L225 Difference]: With dead ends: 324 [2021-05-21 20:49:40,473 INFO L226 Difference]: Without dead ends: 309 [2021-05-21 20:49:40,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-21 20:49:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-05-21 20:49:40,476 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) [2021-05-21 20:49:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-21 20:49:40,476 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-21 20:49:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:40,476 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-21 20:49:40,476 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) [2021-05-21 20:49:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-21 20:49:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:40,477 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:40,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:40,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-21 20:49:40,477 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 409284692, now seen corresponding path program 67 times [2021-05-21 20:49:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:40,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969401679] [2021-05-21 20:49:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:40,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:40,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969401679] [2021-05-21 20:49:40,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969401679] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:40,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:40,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:40,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647406409] [2021-05-21 20:49:40,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:40,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:40,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:40,531 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) [2021-05-21 20:49:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:40,638 INFO L93 Difference]: Finished difference Result 442 states and 1201 transitions. [2021-05-21 20:49:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:40,638 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 [2021-05-21 20:49:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:40,639 INFO L225 Difference]: With dead ends: 442 [2021-05-21 20:49:40,639 INFO L226 Difference]: Without dead ends: 427 [2021-05-21 20:49:40,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-21 20:49:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-05-21 20:49:40,644 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) [2021-05-21 20:49:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-21 20:49:40,644 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-21 20:49:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:40,645 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-21 20:49:40,645 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) [2021-05-21 20:49:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-21 20:49:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:40,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:40,645 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:40,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-21 20:49:40,645 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash -840638728, now seen corresponding path program 68 times [2021-05-21 20:49:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:40,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676454079] [2021-05-21 20:49:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:40,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:40,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676454079] [2021-05-21 20:49:40,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676454079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:40,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:40,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:40,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890831185] [2021-05-21 20:49:40,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:40,696 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) [2021-05-21 20:49:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:40,844 INFO L93 Difference]: Finished difference Result 465 states and 1248 transitions. [2021-05-21 20:49:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:40,844 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 [2021-05-21 20:49:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:40,846 INFO L225 Difference]: With dead ends: 465 [2021-05-21 20:49:40,846 INFO L226 Difference]: Without dead ends: 450 [2021-05-21 20:49:40,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-21 20:49:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-05-21 20:49:40,850 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) [2021-05-21 20:49:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-21 20:49:40,851 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-21 20:49:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:40,851 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-21 20:49:40,851 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) [2021-05-21 20:49:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-21 20:49:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:40,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:40,852 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:40,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-21 20:49:40,852 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2059274088, now seen corresponding path program 69 times [2021-05-21 20:49:40,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:40,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131801271] [2021-05-21 20:49:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:40,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:40,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131801271] [2021-05-21 20:49:40,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131801271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:40,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:40,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001200698] [2021-05-21 20:49:40,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:40,909 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) [2021-05-21 20:49:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:41,067 INFO L93 Difference]: Finished difference Result 442 states and 1203 transitions. [2021-05-21 20:49:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:41,068 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 [2021-05-21 20:49:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:41,069 INFO L225 Difference]: With dead ends: 442 [2021-05-21 20:49:41,069 INFO L226 Difference]: Without dead ends: 427 [2021-05-21 20:49:41,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-21 20:49:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-05-21 20:49:41,072 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) [2021-05-21 20:49:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-21 20:49:41,072 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-21 20:49:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:41,072 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-21 20:49:41,072 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) [2021-05-21 20:49:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-21 20:49:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:41,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:41,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:41,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-21 20:49:41,073 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1005390608, now seen corresponding path program 70 times [2021-05-21 20:49:41,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:41,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135630558] [2021-05-21 20:49:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:41,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:41,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135630558] [2021-05-21 20:49:41,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135630558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:41,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:41,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:41,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716042678] [2021-05-21 20:49:41,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:41,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:41,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:41,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:41,134 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) [2021-05-21 20:49:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:41,294 INFO L93 Difference]: Finished difference Result 393 states and 1085 transitions. [2021-05-21 20:49:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:41,295 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 [2021-05-21 20:49:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:41,295 INFO L225 Difference]: With dead ends: 393 [2021-05-21 20:49:41,295 INFO L226 Difference]: Without dead ends: 378 [2021-05-21 20:49:41,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-21 20:49:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-05-21 20:49:41,300 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) [2021-05-21 20:49:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-21 20:49:41,300 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-21 20:49:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:41,300 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-21 20:49:41,300 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) [2021-05-21 20:49:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-21 20:49:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:41,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:41,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:41,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-21 20:49:41,301 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash 184219092, now seen corresponding path program 71 times [2021-05-21 20:49:41,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:41,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716257484] [2021-05-21 20:49:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:41,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:41,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716257484] [2021-05-21 20:49:41,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716257484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:41,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:41,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343057548] [2021-05-21 20:49:41,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:41,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:41,365 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) [2021-05-21 20:49:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:41,549 INFO L93 Difference]: Finished difference Result 391 states and 1089 transitions. [2021-05-21 20:49:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:41,549 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 [2021-05-21 20:49:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:41,550 INFO L225 Difference]: With dead ends: 391 [2021-05-21 20:49:41,550 INFO L226 Difference]: Without dead ends: 376 [2021-05-21 20:49:41,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-21 20:49:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-05-21 20:49:41,554 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) [2021-05-21 20:49:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-05-21 20:49:41,554 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-05-21 20:49:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:41,554 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-05-21 20:49:41,554 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) [2021-05-21 20:49:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-05-21 20:49:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:41,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:41,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:41,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-21 20:49:41,555 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1514501296, now seen corresponding path program 72 times [2021-05-21 20:49:41,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:41,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629296639] [2021-05-21 20:49:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:41,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:41,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629296639] [2021-05-21 20:49:41,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629296639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:41,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:41,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:41,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69078033] [2021-05-21 20:49:41,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:41,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:41,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:41,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:41,622 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) [2021-05-21 20:49:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:41,844 INFO L93 Difference]: Finished difference Result 368 states and 1044 transitions. [2021-05-21 20:49:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:41,845 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 [2021-05-21 20:49:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:41,846 INFO L225 Difference]: With dead ends: 368 [2021-05-21 20:49:41,846 INFO L226 Difference]: Without dead ends: 353 [2021-05-21 20:49:41,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-21 20:49:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-05-21 20:49:41,850 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) [2021-05-21 20:49:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-21 20:49:41,850 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-21 20:49:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:41,851 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-21 20:49:41,851 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) [2021-05-21 20:49:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-21 20:49:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:41,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:41,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:41,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-21 20:49:41,851 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash 81063412, now seen corresponding path program 73 times [2021-05-21 20:49:41,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:41,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374237793] [2021-05-21 20:49:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:41,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:41,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374237793] [2021-05-21 20:49:41,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374237793] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:41,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:41,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:41,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476259407] [2021-05-21 20:49:41,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:41,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:41,904 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) [2021-05-21 20:49:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:42,069 INFO L93 Difference]: Finished difference Result 445 states and 1229 transitions. [2021-05-21 20:49:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:42,069 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 [2021-05-21 20:49:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:42,071 INFO L225 Difference]: With dead ends: 445 [2021-05-21 20:49:42,071 INFO L226 Difference]: Without dead ends: 430 [2021-05-21 20:49:42,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-21 20:49:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-05-21 20:49:42,076 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) [2021-05-21 20:49:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-21 20:49:42,076 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-21 20:49:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:42,076 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-21 20:49:42,076 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) [2021-05-21 20:49:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-21 20:49:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:42,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:42,077 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:42,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-21 20:49:42,077 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1137571948, now seen corresponding path program 74 times [2021-05-21 20:49:42,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:42,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133785866] [2021-05-21 20:49:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:42,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:42,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133785866] [2021-05-21 20:49:42,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133785866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:42,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:42,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:42,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503075742] [2021-05-21 20:49:42,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:42,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:42,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:42,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:42,137 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) [2021-05-21 20:49:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:42,306 INFO L93 Difference]: Finished difference Result 443 states and 1222 transitions. [2021-05-21 20:49:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:42,307 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 [2021-05-21 20:49:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:42,307 INFO L225 Difference]: With dead ends: 443 [2021-05-21 20:49:42,307 INFO L226 Difference]: Without dead ends: 428 [2021-05-21 20:49:42,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-21 20:49:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-05-21 20:49:42,311 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) [2021-05-21 20:49:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-21 20:49:42,311 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-21 20:49:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:42,311 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-21 20:49:42,311 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) [2021-05-21 20:49:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-21 20:49:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:42,312 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:42,312 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:42,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-21 20:49:42,312 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1070123960, now seen corresponding path program 75 times [2021-05-21 20:49:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:42,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210655955] [2021-05-21 20:49:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:42,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:42,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210655955] [2021-05-21 20:49:42,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210655955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:42,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:42,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:42,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115354470] [2021-05-21 20:49:42,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:42,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:42,368 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) [2021-05-21 20:49:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:42,580 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-21 20:49:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:42,580 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 [2021-05-21 20:49:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:42,581 INFO L225 Difference]: With dead ends: 437 [2021-05-21 20:49:42,581 INFO L226 Difference]: Without dead ends: 422 [2021-05-21 20:49:42,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-21 20:49:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-05-21 20:49:42,585 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) [2021-05-21 20:49:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-21 20:49:42,586 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-21 20:49:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:42,586 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-21 20:49:42,586 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) [2021-05-21 20:49:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-21 20:49:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:42,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:42,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:42,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-21 20:49:42,587 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash -100065036, now seen corresponding path program 76 times [2021-05-21 20:49:42,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:42,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215843700] [2021-05-21 20:49:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:42,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:42,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215843700] [2021-05-21 20:49:42,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215843700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:42,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:42,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:42,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110595578] [2021-05-21 20:49:42,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:42,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:42,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:42,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:42,655 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) [2021-05-21 20:49:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:42,869 INFO L93 Difference]: Finished difference Result 421 states and 1178 transitions. [2021-05-21 20:49:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:42,870 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 [2021-05-21 20:49:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:42,870 INFO L225 Difference]: With dead ends: 421 [2021-05-21 20:49:42,870 INFO L226 Difference]: Without dead ends: 406 [2021-05-21 20:49:42,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-21 20:49:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-05-21 20:49:42,875 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) [2021-05-21 20:49:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-21 20:49:42,875 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-21 20:49:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:42,875 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-21 20:49:42,875 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) [2021-05-21 20:49:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-21 20:49:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:42,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:42,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:42,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-21 20:49:42,876 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:42,876 INFO L82 PathProgramCache]: Analyzing trace with hash -117002088, now seen corresponding path program 77 times [2021-05-21 20:49:42,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:42,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080680989] [2021-05-21 20:49:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:42,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:42,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080680989] [2021-05-21 20:49:42,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080680989] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:42,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:42,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:42,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580301070] [2021-05-21 20:49:42,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:42,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:42,931 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) [2021-05-21 20:49:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:43,081 INFO L93 Difference]: Finished difference Result 405 states and 1129 transitions. [2021-05-21 20:49:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:43,082 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 [2021-05-21 20:49:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:43,082 INFO L225 Difference]: With dead ends: 405 [2021-05-21 20:49:43,082 INFO L226 Difference]: Without dead ends: 390 [2021-05-21 20:49:43,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-21 20:49:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-05-21 20:49:43,088 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) [2021-05-21 20:49:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-21 20:49:43,089 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-21 20:49:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:43,089 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-21 20:49:43,089 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) [2021-05-21 20:49:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-21 20:49:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:43,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:43,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:43,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-21 20:49:43,090 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1023281748, now seen corresponding path program 78 times [2021-05-21 20:49:43,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:43,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202627382] [2021-05-21 20:49:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:43,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:43,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202627382] [2021-05-21 20:49:43,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202627382] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:43,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:43,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391814964] [2021-05-21 20:49:43,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:43,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:43,153 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) [2021-05-21 20:49:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:43,309 INFO L93 Difference]: Finished difference Result 384 states and 1091 transitions. [2021-05-21 20:49:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:43,309 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 [2021-05-21 20:49:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:43,310 INFO L225 Difference]: With dead ends: 384 [2021-05-21 20:49:43,310 INFO L226 Difference]: Without dead ends: 369 [2021-05-21 20:49:43,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-21 20:49:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-05-21 20:49:43,314 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) [2021-05-21 20:49:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-21 20:49:43,314 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-21 20:49:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:43,314 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-21 20:49:43,315 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) [2021-05-21 20:49:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-21 20:49:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:43,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:43,315 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:43,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-21 20:49:43,315 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:43,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1228196736, now seen corresponding path program 79 times [2021-05-21 20:49:43,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:43,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116693777] [2021-05-21 20:49:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:43,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:43,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116693777] [2021-05-21 20:49:43,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116693777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:43,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:43,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:43,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131711732] [2021-05-21 20:49:43,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:43,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:43,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:43,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:43,365 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) [2021-05-21 20:49:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:43,524 INFO L93 Difference]: Finished difference Result 425 states and 1163 transitions. [2021-05-21 20:49:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:43,525 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 [2021-05-21 20:49:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:43,525 INFO L225 Difference]: With dead ends: 425 [2021-05-21 20:49:43,525 INFO L226 Difference]: Without dead ends: 410 [2021-05-21 20:49:43,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-21 20:49:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-05-21 20:49:43,529 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) [2021-05-21 20:49:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-21 20:49:43,530 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-21 20:49:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:43,530 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-21 20:49:43,530 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) [2021-05-21 20:49:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-21 20:49:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:43,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:43,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:43,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-21 20:49:43,531 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1848135200, now seen corresponding path program 80 times [2021-05-21 20:49:43,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:43,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469491289] [2021-05-21 20:49:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:43,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:43,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469491289] [2021-05-21 20:49:43,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469491289] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:43,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:43,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:43,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510802929] [2021-05-21 20:49:43,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:43,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:43,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:43,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:43,599 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) [2021-05-21 20:49:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:43,781 INFO L93 Difference]: Finished difference Result 429 states and 1169 transitions. [2021-05-21 20:49:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:43,781 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 [2021-05-21 20:49:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:43,782 INFO L225 Difference]: With dead ends: 429 [2021-05-21 20:49:43,782 INFO L226 Difference]: Without dead ends: 414 [2021-05-21 20:49:43,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-21 20:49:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-05-21 20:49:43,792 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) [2021-05-21 20:49:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-21 20:49:43,793 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-21 20:49:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:43,793 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-21 20:49:43,793 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) [2021-05-21 20:49:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-21 20:49:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:43,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:43,794 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:43,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-21 20:49:43,794 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:43,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1371120940, now seen corresponding path program 81 times [2021-05-21 20:49:43,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:43,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734409250] [2021-05-21 20:49:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:43,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:43,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734409250] [2021-05-21 20:49:43,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734409250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:43,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:43,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:43,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325527526] [2021-05-21 20:49:43,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:43,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:43,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:43,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:43,861 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) [2021-05-21 20:49:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:44,013 INFO L93 Difference]: Finished difference Result 429 states and 1163 transitions. [2021-05-21 20:49:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:44,014 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 [2021-05-21 20:49:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:44,014 INFO L225 Difference]: With dead ends: 429 [2021-05-21 20:49:44,015 INFO L226 Difference]: Without dead ends: 414 [2021-05-21 20:49:44,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-21 20:49:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-05-21 20:49:44,019 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) [2021-05-21 20:49:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-21 20:49:44,020 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-21 20:49:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:44,020 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-21 20:49:44,020 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) [2021-05-21 20:49:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-21 20:49:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:44,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:44,021 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:44,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-21 20:49:44,021 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1608879492, now seen corresponding path program 82 times [2021-05-21 20:49:44,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:44,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079704418] [2021-05-21 20:49:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:44,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:44,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079704418] [2021-05-21 20:49:44,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079704418] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:44,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:44,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:44,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018496209] [2021-05-21 20:49:44,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:44,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:44,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:44,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:44,074 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) [2021-05-21 20:49:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:44,241 INFO L93 Difference]: Finished difference Result 451 states and 1224 transitions. [2021-05-21 20:49:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:44,241 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 [2021-05-21 20:49:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:44,242 INFO L225 Difference]: With dead ends: 451 [2021-05-21 20:49:44,242 INFO L226 Difference]: Without dead ends: 436 [2021-05-21 20:49:44,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-21 20:49:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-05-21 20:49:44,246 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) [2021-05-21 20:49:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-21 20:49:44,247 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-21 20:49:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:44,247 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-21 20:49:44,247 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) [2021-05-21 20:49:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-21 20:49:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:44,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:44,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:44,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-21 20:49:44,248 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:44,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1467452444, now seen corresponding path program 83 times [2021-05-21 20:49:44,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:44,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32581982] [2021-05-21 20:49:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:44,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:44,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32581982] [2021-05-21 20:49:44,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32581982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:44,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:44,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:44,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973547253] [2021-05-21 20:49:44,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:44,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:44,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:44,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:44,320 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) [2021-05-21 20:49:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:44,457 INFO L93 Difference]: Finished difference Result 455 states and 1230 transitions. [2021-05-21 20:49:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:44,458 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 [2021-05-21 20:49:44,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:44,458 INFO L225 Difference]: With dead ends: 455 [2021-05-21 20:49:44,458 INFO L226 Difference]: Without dead ends: 440 [2021-05-21 20:49:44,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-21 20:49:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-05-21 20:49:44,462 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) [2021-05-21 20:49:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-21 20:49:44,463 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-21 20:49:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:44,463 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-21 20:49:44,463 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) [2021-05-21 20:49:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-21 20:49:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:44,463 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:44,463 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:44,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-21 20:49:44,464 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:44,464 INFO L82 PathProgramCache]: Analyzing trace with hash -619818944, now seen corresponding path program 84 times [2021-05-21 20:49:44,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:44,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962754098] [2021-05-21 20:49:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:44,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:44,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962754098] [2021-05-21 20:49:44,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962754098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:44,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:44,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:44,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388980256] [2021-05-21 20:49:44,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:44,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:44,523 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) [2021-05-21 20:49:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:44,681 INFO L93 Difference]: Finished difference Result 422 states and 1158 transitions. [2021-05-21 20:49:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:44,681 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 [2021-05-21 20:49:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:44,682 INFO L225 Difference]: With dead ends: 422 [2021-05-21 20:49:44,682 INFO L226 Difference]: Without dead ends: 407 [2021-05-21 20:49:44,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-21 20:49:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-05-21 20:49:44,685 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) [2021-05-21 20:49:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-21 20:49:44,686 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-21 20:49:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:44,686 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-21 20:49:44,686 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) [2021-05-21 20:49:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-21 20:49:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:44,686 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:44,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:44,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-21 20:49:44,687 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:44,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1790007940, now seen corresponding path program 85 times [2021-05-21 20:49:44,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:44,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634251742] [2021-05-21 20:49:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:44,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:44,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634251742] [2021-05-21 20:49:44,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634251742] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:44,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:44,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:44,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490744197] [2021-05-21 20:49:44,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:44,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:44,741 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) [2021-05-21 20:49:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:44,939 INFO L93 Difference]: Finished difference Result 406 states and 1135 transitions. [2021-05-21 20:49:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:44,940 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 [2021-05-21 20:49:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:44,940 INFO L225 Difference]: With dead ends: 406 [2021-05-21 20:49:44,941 INFO L226 Difference]: Without dead ends: 391 [2021-05-21 20:49:44,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-21 20:49:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-05-21 20:49:44,944 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) [2021-05-21 20:49:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-21 20:49:44,945 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-21 20:49:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:44,945 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-21 20:49:44,945 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) [2021-05-21 20:49:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-21 20:49:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:44,946 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:44,946 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:44,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-21 20:49:44,946 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1806944992, now seen corresponding path program 86 times [2021-05-21 20:49:44,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:44,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456718641] [2021-05-21 20:49:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:45,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:45,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456718641] [2021-05-21 20:49:45,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456718641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:45,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:45,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:45,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575490237] [2021-05-21 20:49:45,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:45,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:45,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:45,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:45,008 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) [2021-05-21 20:49:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:45,185 INFO L93 Difference]: Finished difference Result 440 states and 1205 transitions. [2021-05-21 20:49:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:45,186 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 [2021-05-21 20:49:45,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:45,186 INFO L225 Difference]: With dead ends: 440 [2021-05-21 20:49:45,186 INFO L226 Difference]: Without dead ends: 425 [2021-05-21 20:49:45,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-21 20:49:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-05-21 20:49:45,190 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) [2021-05-21 20:49:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-21 20:49:45,191 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-21 20:49:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:45,191 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-21 20:49:45,191 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) [2021-05-21 20:49:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-21 20:49:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:45,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:45,191 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:45,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-21 20:49:45,192 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash -666661156, now seen corresponding path program 87 times [2021-05-21 20:49:45,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:45,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302765270] [2021-05-21 20:49:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:45,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:45,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302765270] [2021-05-21 20:49:45,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302765270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:45,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:45,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959469731] [2021-05-21 20:49:45,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:45,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:45,241 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) [2021-05-21 20:49:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:45,409 INFO L93 Difference]: Finished difference Result 419 states and 1167 transitions. [2021-05-21 20:49:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:45,410 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 [2021-05-21 20:49:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:45,411 INFO L225 Difference]: With dead ends: 419 [2021-05-21 20:49:45,411 INFO L226 Difference]: Without dead ends: 404 [2021-05-21 20:49:45,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-21 20:49:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-05-21 20:49:45,414 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) [2021-05-21 20:49:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-21 20:49:45,415 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-21 20:49:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:45,415 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-21 20:49:45,415 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) [2021-05-21 20:49:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-21 20:49:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:45,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:45,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:45,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-21 20:49:45,416 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:45,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:45,416 INFO L82 PathProgramCache]: Analyzing trace with hash 201773648, now seen corresponding path program 88 times [2021-05-21 20:49:45,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:45,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455420322] [2021-05-21 20:49:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:45,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:45,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455420322] [2021-05-21 20:49:45,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455420322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:45,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:45,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:45,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693420819] [2021-05-21 20:49:45,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:45,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:45,483 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) [2021-05-21 20:49:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:45,619 INFO L93 Difference]: Finished difference Result 382 states and 1052 transitions. [2021-05-21 20:49:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:45,620 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 [2021-05-21 20:49:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:45,621 INFO L225 Difference]: With dead ends: 382 [2021-05-21 20:49:45,621 INFO L226 Difference]: Without dead ends: 367 [2021-05-21 20:49:45,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-21 20:49:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-05-21 20:49:45,624 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) [2021-05-21 20:49:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-21 20:49:45,625 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-21 20:49:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:45,625 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-21 20:49:45,625 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) [2021-05-21 20:49:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-21 20:49:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:45,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:45,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:45,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-21 20:49:45,626 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:45,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1159324884, now seen corresponding path program 89 times [2021-05-21 20:49:45,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:45,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122926418] [2021-05-21 20:49:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:45,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:45,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122926418] [2021-05-21 20:49:45,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122926418] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:45,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:45,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:45,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434647533] [2021-05-21 20:49:45,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:45,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:45,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:45,689 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) [2021-05-21 20:49:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:45,865 INFO L93 Difference]: Finished difference Result 383 states and 1063 transitions. [2021-05-21 20:49:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:45,865 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 [2021-05-21 20:49:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:45,866 INFO L225 Difference]: With dead ends: 383 [2021-05-21 20:49:45,866 INFO L226 Difference]: Without dead ends: 368 [2021-05-21 20:49:45,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-21 20:49:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-05-21 20:49:45,869 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) [2021-05-21 20:49:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-21 20:49:45,870 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-21 20:49:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:45,870 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-21 20:49:45,870 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) [2021-05-21 20:49:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-21 20:49:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:49:45,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:45,872 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:45,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-21 20:49:45,872 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1995358576, now seen corresponding path program 90 times [2021-05-21 20:49:45,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:45,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234409716] [2021-05-21 20:49:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:45,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:45,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234409716] [2021-05-21 20:49:45,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234409716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:45,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:45,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:45,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048015126] [2021-05-21 20:49:45,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:45,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:45,926 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) [2021-05-21 20:49:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:46,086 INFO L93 Difference]: Finished difference Result 362 states and 1025 transitions. [2021-05-21 20:49:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:46,086 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 [2021-05-21 20:49:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:46,087 INFO L225 Difference]: With dead ends: 362 [2021-05-21 20:49:46,087 INFO L226 Difference]: Without dead ends: 347 [2021-05-21 20:49:46,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-21 20:49:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-05-21 20:49:46,093 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) [2021-05-21 20:49:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-21 20:49:46,094 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-21 20:49:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:46,094 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-21 20:49:46,094 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) [2021-05-21 20:49:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-21 20:49:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:46,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:46,094 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:46,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-21 20:49:46,095 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1303103675, now seen corresponding path program 1 times [2021-05-21 20:49:46,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:46,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744424130] [2021-05-21 20:49:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:46,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:46,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744424130] [2021-05-21 20:49:46,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744424130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:46,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938810150] [2021-05-21 20:49:46,170 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 [2021-05-21 20:49:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:46,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:46,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938810150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:46,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:46,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:49:46,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088765151] [2021-05-21 20:49:46,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:46,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:46,477 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) [2021-05-21 20:49:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:46,646 INFO L93 Difference]: Finished difference Result 363 states and 1031 transitions. [2021-05-21 20:49:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:46,646 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 [2021-05-21 20:49:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:46,648 INFO L225 Difference]: With dead ends: 363 [2021-05-21 20:49:46,648 INFO L226 Difference]: Without dead ends: 344 [2021-05-21 20:49:46,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-21 20:49:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-05-21 20:49:46,659 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) [2021-05-21 20:49:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-21 20:49:46,660 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 18 [2021-05-21 20:49:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:46,660 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-21 20:49:46,660 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) [2021-05-21 20:49:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-21 20:49:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:46,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:46,662 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:46,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-21 20:49:46,881 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:46,881 INFO L82 PathProgramCache]: Analyzing trace with hash -95550603, now seen corresponding path program 2 times [2021-05-21 20:49:46,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:46,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445471327] [2021-05-21 20:49:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:46,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:46,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445471327] [2021-05-21 20:49:46,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445471327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:46,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524623739] [2021-05-21 20:49:46,955 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 [2021-05-21 20:49:46,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:49:46,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:47,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524623739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:47,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:47,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:49:47,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186084157] [2021-05-21 20:49:47,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:47,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:47,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:47,107 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) [2021-05-21 20:49:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:47,277 INFO L93 Difference]: Finished difference Result 405 states and 1139 transitions. [2021-05-21 20:49:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:47,278 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 [2021-05-21 20:49:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:47,279 INFO L225 Difference]: With dead ends: 405 [2021-05-21 20:49:47,279 INFO L226 Difference]: Without dead ends: 386 [2021-05-21 20:49:47,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-21 20:49:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 214. [2021-05-21 20:49:47,284 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) [2021-05-21 20:49:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 640 transitions. [2021-05-21 20:49:47,285 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 640 transitions. Word has length 18 [2021-05-21 20:49:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:47,285 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 640 transitions. [2021-05-21 20:49:47,285 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) [2021-05-21 20:49:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 640 transitions. [2021-05-21 20:49:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:47,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:47,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:47,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:47,501 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1794270991, now seen corresponding path program 3 times [2021-05-21 20:49:47,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:47,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291139835] [2021-05-21 20:49:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:47,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:47,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291139835] [2021-05-21 20:49:47,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291139835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:47,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185505564] [2021-05-21 20:49:47,560 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 [2021-05-21 20:49:47,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:49:47,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:47,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185505564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:47,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:47,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:49:47,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852894647] [2021-05-21 20:49:47,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:47,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:47,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:47,696 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) [2021-05-21 20:49:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:47,887 INFO L93 Difference]: Finished difference Result 384 states and 1093 transitions. [2021-05-21 20:49:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:47,888 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 [2021-05-21 20:49:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:47,893 INFO L225 Difference]: With dead ends: 384 [2021-05-21 20:49:47,893 INFO L226 Difference]: Without dead ends: 365 [2021-05-21 20:49:47,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-21 20:49:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 206. [2021-05-21 20:49:47,897 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) [2021-05-21 20:49:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 608 transitions. [2021-05-21 20:49:47,897 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 608 transitions. Word has length 18 [2021-05-21 20:49:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:47,898 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 608 transitions. [2021-05-21 20:49:47,898 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) [2021-05-21 20:49:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 608 transitions. [2021-05-21 20:49:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:47,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:47,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:48,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 20:49:48,122 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash -605004921, now seen corresponding path program 4 times [2021-05-21 20:49:48,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:48,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631888780] [2021-05-21 20:49:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:48,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:48,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631888780] [2021-05-21 20:49:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631888780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:48,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472719578] [2021-05-21 20:49:48,175 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 [2021-05-21 20:49:48,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:49:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:48,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:48,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472719578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:48,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:48,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:49:48,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367035232] [2021-05-21 20:49:48,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:48,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:48,291 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) [2021-05-21 20:49:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:48,469 INFO L93 Difference]: Finished difference Result 395 states and 1126 transitions. [2021-05-21 20:49:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:48,470 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 [2021-05-21 20:49:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:48,471 INFO L225 Difference]: With dead ends: 395 [2021-05-21 20:49:48,471 INFO L226 Difference]: Without dead ends: 376 [2021-05-21 20:49:48,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-21 20:49:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 212. [2021-05-21 20:49:48,475 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) [2021-05-21 20:49:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-05-21 20:49:48,475 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 18 [2021-05-21 20:49:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:48,475 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-05-21 20:49:48,476 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) [2021-05-21 20:49:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-05-21 20:49:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:48,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:48,476 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:48,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-21 20:49:48,685 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash -630780405, now seen corresponding path program 5 times [2021-05-21 20:49:48,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:48,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918005459] [2021-05-21 20:49:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:48,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918005459] [2021-05-21 20:49:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918005459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701638711] [2021-05-21 20:49:48,739 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 [2021-05-21 20:49:48,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:49:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:48,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701638711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:48,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:48,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:49:48,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326799326] [2021-05-21 20:49:48,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:48,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:48,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:48,892 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) [2021-05-21 20:49:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:49,097 INFO L93 Difference]: Finished difference Result 437 states and 1235 transitions. [2021-05-21 20:49:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:49,097 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 [2021-05-21 20:49:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:49,098 INFO L225 Difference]: With dead ends: 437 [2021-05-21 20:49:49,098 INFO L226 Difference]: Without dead ends: 418 [2021-05-21 20:49:49,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-21 20:49:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 216. [2021-05-21 20:49:49,103 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) [2021-05-21 20:49:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 651 transitions. [2021-05-21 20:49:49,103 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 651 transitions. Word has length 18 [2021-05-21 20:49:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:49,103 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 651 transitions. [2021-05-21 20:49:49,103 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) [2021-05-21 20:49:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 651 transitions. [2021-05-21 20:49:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:49,104 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:49,104 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:49,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 20:49:49,317 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:49,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1965466503, now seen corresponding path program 6 times [2021-05-21 20:49:49,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:49,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049425042] [2021-05-21 20:49:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:49,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:49,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049425042] [2021-05-21 20:49:49,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049425042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:49,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118636197] [2021-05-21 20:49:49,369 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 [2021-05-21 20:49:49,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:49:49,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:49,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:49,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:49,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118636197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:49,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:49,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:49:49,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567164542] [2021-05-21 20:49:49,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:49,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:49,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:49,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:49,502 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) [2021-05-21 20:49:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:49,675 INFO L93 Difference]: Finished difference Result 408 states and 1169 transitions. [2021-05-21 20:49:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:49,675 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 [2021-05-21 20:49:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:49,676 INFO L225 Difference]: With dead ends: 408 [2021-05-21 20:49:49,676 INFO L226 Difference]: Without dead ends: 389 [2021-05-21 20:49:49,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-21 20:49:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 202. [2021-05-21 20:49:49,680 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) [2021-05-21 20:49:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 604 transitions. [2021-05-21 20:49:49,681 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 604 transitions. Word has length 18 [2021-05-21 20:49:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:49,681 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 604 transitions. [2021-05-21 20:49:49,681 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) [2021-05-21 20:49:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 604 transitions. [2021-05-21 20:49:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:49,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:49,681 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:49,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:49,882 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash -725187835, now seen corresponding path program 1 times [2021-05-21 20:49:49,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:49,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856383842] [2021-05-21 20:49:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:49,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:49,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856383842] [2021-05-21 20:49:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856383842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:49,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:49,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185048547] [2021-05-21 20:49:49,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:49:49,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:49,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:49:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:49,948 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) [2021-05-21 20:49:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:50,039 INFO L93 Difference]: Finished difference Result 424 states and 1195 transitions. [2021-05-21 20:49:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:49:50,040 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 [2021-05-21 20:49:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:50,041 INFO L225 Difference]: With dead ends: 424 [2021-05-21 20:49:50,041 INFO L226 Difference]: Without dead ends: 366 [2021-05-21 20:49:50,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-21 20:49:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 252. [2021-05-21 20:49:50,045 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) [2021-05-21 20:49:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 736 transitions. [2021-05-21 20:49:50,046 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 736 transitions. Word has length 18 [2021-05-21 20:49:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:50,046 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 736 transitions. [2021-05-21 20:49:50,046 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) [2021-05-21 20:49:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 736 transitions. [2021-05-21 20:49:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:50,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:50,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:50,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-21 20:49:50,047 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:50,048 INFO L82 PathProgramCache]: Analyzing trace with hash -809235458, now seen corresponding path program 1 times [2021-05-21 20:49:50,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:50,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386803846] [2021-05-21 20:49:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:50,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:50,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386803846] [2021-05-21 20:49:50,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386803846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:50,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:50,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:50,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311297198] [2021-05-21 20:49:50,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:49:50,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:50,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:49:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:50,118 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) [2021-05-21 20:49:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:50,215 INFO L93 Difference]: Finished difference Result 445 states and 1245 transitions. [2021-05-21 20:49:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:49:50,215 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 [2021-05-21 20:49:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:50,216 INFO L225 Difference]: With dead ends: 445 [2021-05-21 20:49:50,216 INFO L226 Difference]: Without dead ends: 358 [2021-05-21 20:49:50,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-21 20:49:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 269. [2021-05-21 20:49:50,221 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) [2021-05-21 20:49:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 783 transitions. [2021-05-21 20:49:50,221 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 783 transitions. Word has length 18 [2021-05-21 20:49:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:50,222 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 783 transitions. [2021-05-21 20:49:50,222 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) [2021-05-21 20:49:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 783 transitions. [2021-05-21 20:49:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:50,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:50,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:50,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-21 20:49:50,222 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash -966424801, now seen corresponding path program 7 times [2021-05-21 20:49:50,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:50,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420612467] [2021-05-21 20:49:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:50,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:50,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420612467] [2021-05-21 20:49:50,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420612467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:50,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266479604] [2021-05-21 20:49:50,274 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 [2021-05-21 20:49:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:50,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:50,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266479604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:50,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:50,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:50,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972303617] [2021-05-21 20:49:50,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:50,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:50,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:50,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:50,429 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) [2021-05-21 20:49:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:50,603 INFO L93 Difference]: Finished difference Result 563 states and 1578 transitions. [2021-05-21 20:49:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:50,603 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 [2021-05-21 20:49:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:50,604 INFO L225 Difference]: With dead ends: 563 [2021-05-21 20:49:50,604 INFO L226 Difference]: Without dead ends: 544 [2021-05-21 20:49:50,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-21 20:49:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 278. [2021-05-21 20:49:50,609 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) [2021-05-21 20:49:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 821 transitions. [2021-05-21 20:49:50,610 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 821 transitions. Word has length 18 [2021-05-21 20:49:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:50,610 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 821 transitions. [2021-05-21 20:49:50,610 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) [2021-05-21 20:49:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 821 transitions. [2021-05-21 20:49:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:50,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:50,611 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:50,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 20:49:50,834 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash 241128271, now seen corresponding path program 8 times [2021-05-21 20:49:50,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:50,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152452577] [2021-05-21 20:49:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:50,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152452577] [2021-05-21 20:49:50,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152452577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508361698] [2021-05-21 20:49:50,881 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 [2021-05-21 20:49:50,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:49:50,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:50,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508361698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:50,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:50,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:49:50,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568861492] [2021-05-21 20:49:50,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:50,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:50,995 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) [2021-05-21 20:49:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:51,129 INFO L93 Difference]: Finished difference Result 539 states and 1539 transitions. [2021-05-21 20:49:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:51,129 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 [2021-05-21 20:49:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:51,131 INFO L225 Difference]: With dead ends: 539 [2021-05-21 20:49:51,131 INFO L226 Difference]: Without dead ends: 520 [2021-05-21 20:49:51,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:49:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-21 20:49:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 282. [2021-05-21 20:49:51,136 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) [2021-05-21 20:49:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 841 transitions. [2021-05-21 20:49:51,137 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 841 transitions. Word has length 18 [2021-05-21 20:49:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:51,137 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 841 transitions. [2021-05-21 20:49:51,137 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) [2021-05-21 20:49:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 841 transitions. [2021-05-21 20:49:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:51,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:51,138 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:51,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-21 20:49:51,353 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1457592117, now seen corresponding path program 9 times [2021-05-21 20:49:51,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:51,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527692041] [2021-05-21 20:49:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:51,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:51,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527692041] [2021-05-21 20:49:51,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527692041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:51,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534033327] [2021-05-21 20:49:51,412 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 [2021-05-21 20:49:51,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:49:51,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534033327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:51,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:51,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429786473] [2021-05-21 20:49:51,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:51,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:51,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:51,545 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) [2021-05-21 20:49:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:51,687 INFO L93 Difference]: Finished difference Result 549 states and 1564 transitions. [2021-05-21 20:49:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:51,687 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 [2021-05-21 20:49:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:51,688 INFO L225 Difference]: With dead ends: 549 [2021-05-21 20:49:51,688 INFO L226 Difference]: Without dead ends: 530 [2021-05-21 20:49:51,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-21 20:49:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 271. [2021-05-21 20:49:51,693 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) [2021-05-21 20:49:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 793 transitions. [2021-05-21 20:49:51,694 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 793 transitions. Word has length 18 [2021-05-21 20:49:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:51,694 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 793 transitions. [2021-05-21 20:49:51,694 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) [2021-05-21 20:49:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 793 transitions. [2021-05-21 20:49:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:51,694 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:51,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:51,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:51,913 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:51,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1254344866, now seen corresponding path program 2 times [2021-05-21 20:49:51,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:51,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430160613] [2021-05-21 20:49:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:51,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:51,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430160613] [2021-05-21 20:49:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430160613] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:51,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:51,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:51,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684915306] [2021-05-21 20:49:51,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:49:51,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:49:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:51,985 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) [2021-05-21 20:49:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:52,063 INFO L93 Difference]: Finished difference Result 528 states and 1474 transitions. [2021-05-21 20:49:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:49:52,063 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 [2021-05-21 20:49:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:52,064 INFO L225 Difference]: With dead ends: 528 [2021-05-21 20:49:52,064 INFO L226 Difference]: Without dead ends: 457 [2021-05-21 20:49:52,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-21 20:49:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-05-21 20:49:52,071 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) [2021-05-21 20:49:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 850 transitions. [2021-05-21 20:49:52,072 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 850 transitions. Word has length 18 [2021-05-21 20:49:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:52,072 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 850 transitions. [2021-05-21 20:49:52,072 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) [2021-05-21 20:49:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 850 transitions. [2021-05-21 20:49:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:52,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:52,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:52,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-21 20:49:52,073 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1663824377, now seen corresponding path program 10 times [2021-05-21 20:49:52,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:52,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750590053] [2021-05-21 20:49:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:52,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:52,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750590053] [2021-05-21 20:49:52,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750590053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:52,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250574971] [2021-05-21 20:49:52,131 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 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 [2021-05-21 20:49:52,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:49:52,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:52,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250574971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:52,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:52,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:49:52,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185275141] [2021-05-21 20:49:52,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:49:52,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:49:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:52,298 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) [2021-05-21 20:49:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:52,568 INFO L93 Difference]: Finished difference Result 473 states and 1329 transitions. [2021-05-21 20:49:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:52,568 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 [2021-05-21 20:49:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:52,569 INFO L225 Difference]: With dead ends: 473 [2021-05-21 20:49:52,569 INFO L226 Difference]: Without dead ends: 454 [2021-05-21 20:49:52,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:49:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-21 20:49:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 291. [2021-05-21 20:49:52,574 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) [2021-05-21 20:49:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-05-21 20:49:52,575 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 18 [2021-05-21 20:49:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:52,575 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-05-21 20:49:52,575 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) [2021-05-21 20:49:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-05-21 20:49:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:52,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:52,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:52,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 20:49:52,776 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1866597709, now seen corresponding path program 11 times [2021-05-21 20:49:52,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:52,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127196789] [2021-05-21 20:49:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:52,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:52,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127196789] [2021-05-21 20:49:52,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127196789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:52,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608863599] [2021-05-21 20:49:52,830 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 [2021-05-21 20:49:52,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:49:52,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:52,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:52,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608863599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:52,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:52,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:52,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449083536] [2021-05-21 20:49:52,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:52,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:52,980 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) [2021-05-21 20:49:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:53,255 INFO L93 Difference]: Finished difference Result 431 states and 1219 transitions. [2021-05-21 20:49:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:53,255 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 [2021-05-21 20:49:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:53,256 INFO L225 Difference]: With dead ends: 431 [2021-05-21 20:49:53,256 INFO L226 Difference]: Without dead ends: 408 [2021-05-21 20:49:53,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-21 20:49:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 299. [2021-05-21 20:49:53,260 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) [2021-05-21 20:49:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 884 transitions. [2021-05-21 20:49:53,261 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 884 transitions. Word has length 18 [2021-05-21 20:49:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:53,261 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 884 transitions. [2021-05-21 20:49:53,261 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) [2021-05-21 20:49:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 884 transitions. [2021-05-21 20:49:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:53,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:53,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:53,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 20:49:53,465 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash -752125083, now seen corresponding path program 2 times [2021-05-21 20:49:53,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:53,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076616828] [2021-05-21 20:49:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:53,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:53,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076616828] [2021-05-21 20:49:53,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076616828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:53,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845366848] [2021-05-21 20:49:53,514 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 [2021-05-21 20:49:53,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:49:53,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:49:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:53,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845366848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:53,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:53,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:53,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295559633] [2021-05-21 20:49:53,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:53,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:53,643 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) [2021-05-21 20:49:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:53,792 INFO L93 Difference]: Finished difference Result 471 states and 1313 transitions. [2021-05-21 20:49:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:53,793 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 [2021-05-21 20:49:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:53,793 INFO L225 Difference]: With dead ends: 471 [2021-05-21 20:49:53,793 INFO L226 Difference]: Without dead ends: 449 [2021-05-21 20:49:53,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-21 20:49:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 301. [2021-05-21 20:49:53,797 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) [2021-05-21 20:49:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 891 transitions. [2021-05-21 20:49:53,797 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 891 transitions. Word has length 18 [2021-05-21 20:49:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:53,798 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 891 transitions. [2021-05-21 20:49:53,798 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) [2021-05-21 20:49:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 891 transitions. [2021-05-21 20:49:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:53,798 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:53,798 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:54,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:54,001 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1213009967, now seen corresponding path program 12 times [2021-05-21 20:49:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:54,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259238214] [2021-05-21 20:49:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259238214] [2021-05-21 20:49:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259238214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218534918] [2021-05-21 20:49:54,060 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 [2021-05-21 20:49:54,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:49:54,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:54,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:54,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218534918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:54,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:54,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:54,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127016600] [2021-05-21 20:49:54,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:54,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:54,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:54,233 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) [2021-05-21 20:49:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:54,514 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-05-21 20:49:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:54,514 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 [2021-05-21 20:49:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:54,515 INFO L225 Difference]: With dead ends: 417 [2021-05-21 20:49:54,515 INFO L226 Difference]: Without dead ends: 398 [2021-05-21 20:49:54,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:49:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-21 20:49:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 295. [2021-05-21 20:49:54,518 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) [2021-05-21 20:49:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-05-21 20:49:54,519 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-05-21 20:49:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:54,519 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-05-21 20:49:54,519 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) [2021-05-21 20:49:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-05-21 20:49:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:54,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:54,519 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:54,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 20:49:54,720 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 303490843, now seen corresponding path program 3 times [2021-05-21 20:49:54,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:54,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108011926] [2021-05-21 20:49:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:54,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:54,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108011926] [2021-05-21 20:49:54,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108011926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:54,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:54,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:49:54,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597769361] [2021-05-21 20:49:54,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:49:54,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:54,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:49:54,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:49:54,772 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) [2021-05-21 20:49:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:54,975 INFO L93 Difference]: Finished difference Result 441 states and 1242 transitions. [2021-05-21 20:49:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:54,975 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 [2021-05-21 20:49:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:54,976 INFO L225 Difference]: With dead ends: 441 [2021-05-21 20:49:54,976 INFO L226 Difference]: Without dead ends: 412 [2021-05-21 20:49:54,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-21 20:49:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 295. [2021-05-21 20:49:54,982 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) [2021-05-21 20:49:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-05-21 20:49:54,982 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-05-21 20:49:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:54,982 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-05-21 20:49:54,983 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) [2021-05-21 20:49:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-05-21 20:49:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:54,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:54,983 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:54,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-21 20:49:54,983 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1861527460, now seen corresponding path program 3 times [2021-05-21 20:49:54,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:54,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541145641] [2021-05-21 20:49:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541145641] [2021-05-21 20:49:55,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541145641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:55,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948540397] [2021-05-21 20:49:55,022 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 [2021-05-21 20:49:55,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:49:55,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:55,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:49:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948540397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:55,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:55,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:49:55,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026349639] [2021-05-21 20:49:55,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:49:55,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:55,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:49:55,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:55,132 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) [2021-05-21 20:49:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:55,214 INFO L93 Difference]: Finished difference Result 458 states and 1290 transitions. [2021-05-21 20:49:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:49:55,214 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 [2021-05-21 20:49:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:55,215 INFO L225 Difference]: With dead ends: 458 [2021-05-21 20:49:55,215 INFO L226 Difference]: Without dead ends: 401 [2021-05-21 20:49:55,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-21 20:49:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 292. [2021-05-21 20:49:55,220 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) [2021-05-21 20:49:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 864 transitions. [2021-05-21 20:49:55,220 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 864 transitions. Word has length 18 [2021-05-21 20:49:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:55,221 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 864 transitions. [2021-05-21 20:49:55,221 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) [2021-05-21 20:49:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 864 transitions. [2021-05-21 20:49:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:55,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:55,221 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:55,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:55,444 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1997185865, now seen corresponding path program 13 times [2021-05-21 20:49:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:55,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567219576] [2021-05-21 20:49:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567219576] [2021-05-21 20:49:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567219576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057099560] [2021-05-21 20:49:55,513 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 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 [2021-05-21 20:49:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:55,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:55,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:55,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057099560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:55,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:55,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 20:49:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559664984] [2021-05-21 20:49:55,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:55,636 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) [2021-05-21 20:49:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:55,840 INFO L93 Difference]: Finished difference Result 491 states and 1393 transitions. [2021-05-21 20:49:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:55,841 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 [2021-05-21 20:49:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:55,841 INFO L225 Difference]: With dead ends: 491 [2021-05-21 20:49:55,841 INFO L226 Difference]: Without dead ends: 472 [2021-05-21 20:49:55,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-21 20:49:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 298. [2021-05-21 20:49:55,846 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) [2021-05-21 20:49:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 892 transitions. [2021-05-21 20:49:55,846 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 892 transitions. Word has length 18 [2021-05-21 20:49:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:55,846 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 892 transitions. [2021-05-21 20:49:55,846 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) [2021-05-21 20:49:55,846 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 892 transitions. [2021-05-21 20:49:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:55,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:55,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:56,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:56,048 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1067024689, now seen corresponding path program 14 times [2021-05-21 20:49:56,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:56,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482724244] [2021-05-21 20:49:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:56,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:56,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482724244] [2021-05-21 20:49:56,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482724244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:56,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708548875] [2021-05-21 20:49:56,102 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 [2021-05-21 20:49:56,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:49:56,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:56,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708548875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:56,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:56,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:49:56,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662330637] [2021-05-21 20:49:56,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:49:56,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:56,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:49:56,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:56,247 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) [2021-05-21 20:49:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:56,449 INFO L93 Difference]: Finished difference Result 479 states and 1353 transitions. [2021-05-21 20:49:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:56,449 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 [2021-05-21 20:49:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:56,450 INFO L225 Difference]: With dead ends: 479 [2021-05-21 20:49:56,450 INFO L226 Difference]: Without dead ends: 456 [2021-05-21 20:49:56,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:49:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-05-21 20:49:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-05-21 20:49:56,454 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) [2021-05-21 20:49:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 898 transitions. [2021-05-21 20:49:56,454 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 898 transitions. Word has length 18 [2021-05-21 20:49:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:56,455 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 898 transitions. [2021-05-21 20:49:56,455 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) [2021-05-21 20:49:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 898 transitions. [2021-05-21 20:49:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:56,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:56,455 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:56,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 20:49:56,656 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:56,656 INFO L82 PathProgramCache]: Analyzing trace with hash -435848983, now seen corresponding path program 4 times [2021-05-21 20:49:56,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:56,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418025195] [2021-05-21 20:49:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:56,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:56,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418025195] [2021-05-21 20:49:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418025195] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:56,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074637884] [2021-05-21 20:49:56,682 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 [2021-05-21 20:49:56,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:49:56,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:56,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:49:56,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:56,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074637884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:56,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:56,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 20:49:56,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227232783] [2021-05-21 20:49:56,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:49:56,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:49:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:49:56,782 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) [2021-05-21 20:49:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:56,832 INFO L93 Difference]: Finished difference Result 566 states and 1645 transitions. [2021-05-21 20:49:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:49:56,832 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 [2021-05-21 20:49:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:56,833 INFO L225 Difference]: With dead ends: 566 [2021-05-21 20:49:56,833 INFO L226 Difference]: Without dead ends: 517 [2021-05-21 20:49:56,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:49:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-05-21 20:49:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-05-21 20:49:56,837 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) [2021-05-21 20:49:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 943 transitions. [2021-05-21 20:49:56,837 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 943 transitions. Word has length 18 [2021-05-21 20:49:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:56,838 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 943 transitions. [2021-05-21 20:49:56,838 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) [2021-05-21 20:49:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 943 transitions. [2021-05-21 20:49:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:56,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:56,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:57,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:57,040 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1726676173, now seen corresponding path program 15 times [2021-05-21 20:49:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:57,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254786228] [2021-05-21 20:49:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:57,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:57,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254786228] [2021-05-21 20:49:57,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254786228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:57,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031315859] [2021-05-21 20:49:57,109 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 [2021-05-21 20:49:57,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:49:57,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:57,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:57,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031315859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:57,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:57,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:49:57,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259556583] [2021-05-21 20:49:57,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:49:57,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:49:57,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:57,255 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) [2021-05-21 20:49:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:57,493 INFO L93 Difference]: Finished difference Result 516 states and 1480 transitions. [2021-05-21 20:49:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:57,493 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 [2021-05-21 20:49:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:57,494 INFO L225 Difference]: With dead ends: 516 [2021-05-21 20:49:57,494 INFO L226 Difference]: Without dead ends: 497 [2021-05-21 20:49:57,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:49:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-05-21 20:49:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 308. [2021-05-21 20:49:57,499 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) [2021-05-21 20:49:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 940 transitions. [2021-05-21 20:49:57,500 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 940 transitions. Word has length 18 [2021-05-21 20:49:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:57,500 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 940 transitions. [2021-05-21 20:49:57,500 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) [2021-05-21 20:49:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 940 transitions. [2021-05-21 20:49:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:57,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:57,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:57,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-21 20:49:57,709 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1907804621, now seen corresponding path program 16 times [2021-05-21 20:49:57,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:57,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124772541] [2021-05-21 20:49:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:57,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:57,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124772541] [2021-05-21 20:49:57,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124772541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:57,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010739856] [2021-05-21 20:49:57,764 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 [2021-05-21 20:49:57,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:49:57,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:57,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010739856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:57,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:57,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:57,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366543188] [2021-05-21 20:49:57,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:57,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:57,907 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) [2021-05-21 20:49:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,050 INFO L93 Difference]: Finished difference Result 497 states and 1451 transitions. [2021-05-21 20:49:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:58,051 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 [2021-05-21 20:49:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,053 INFO L225 Difference]: With dead ends: 497 [2021-05-21 20:49:58,053 INFO L226 Difference]: Without dead ends: 478 [2021-05-21 20:49:58,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-21 20:49:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2021-05-21 20:49:58,061 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) [2021-05-21 20:49:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-05-21 20:49:58,063 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 18 [2021-05-21 20:49:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,064 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-05-21 20:49:58,064 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) [2021-05-21 20:49:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-05-21 20:49:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:58,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,065 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:58,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:58,290 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash 398774047, now seen corresponding path program 5 times [2021-05-21 20:49:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:58,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477981234] [2021-05-21 20:49:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:58,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477981234] [2021-05-21 20:49:58,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477981234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:58,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:58,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:49:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313619490] [2021-05-21 20:49:58,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:49:58,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:58,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:49:58,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:58,350 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) [2021-05-21 20:49:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,430 INFO L93 Difference]: Finished difference Result 514 states and 1465 transitions. [2021-05-21 20:49:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:49:58,430 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 [2021-05-21 20:49:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,431 INFO L225 Difference]: With dead ends: 514 [2021-05-21 20:49:58,431 INFO L226 Difference]: Without dead ends: 452 [2021-05-21 20:49:58,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:49:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-21 20:49:58,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 296. [2021-05-21 20:49:58,435 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) [2021-05-21 20:49:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-05-21 20:49:58,435 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-05-21 20:49:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,436 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-05-21 20:49:58,436 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) [2021-05-21 20:49:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-05-21 20:49:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:58,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,436 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:58,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-21 20:49:58,437 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:58,437 INFO L82 PathProgramCache]: Analyzing trace with hash 505869899, now seen corresponding path program 17 times [2021-05-21 20:49:58,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:58,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117019618] [2021-05-21 20:49:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:58,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117019618] [2021-05-21 20:49:58,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117019618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:58,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037159246] [2021-05-21 20:49:58,506 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 [2021-05-21 20:49:58,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:49:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:58,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037159246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:58,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:58,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:58,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408272702] [2021-05-21 20:49:58,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:58,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:58,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:58,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:58,672 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) [2021-05-21 20:49:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:58,949 INFO L93 Difference]: Finished difference Result 450 states and 1288 transitions. [2021-05-21 20:49:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:58,950 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 [2021-05-21 20:49:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:58,950 INFO L225 Difference]: With dead ends: 450 [2021-05-21 20:49:58,950 INFO L226 Difference]: Without dead ends: 427 [2021-05-21 20:49:58,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-21 20:49:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 304. [2021-05-21 20:49:58,954 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) [2021-05-21 20:49:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-05-21 20:49:58,954 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 18 [2021-05-21 20:49:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:58,955 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-05-21 20:49:58,955 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) [2021-05-21 20:49:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-05-21 20:49:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:58,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:58,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:59,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:49:59,156 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1484427343, now seen corresponding path program 18 times [2021-05-21 20:49:59,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:59,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242228826] [2021-05-21 20:49:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:59,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242228826] [2021-05-21 20:49:59,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242228826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254354635] [2021-05-21 20:49:59,210 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 [2021-05-21 20:49:59,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:49:59,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:49:59,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:59,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254354635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:59,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:59,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:49:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675653610] [2021-05-21 20:49:59,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:49:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:59,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:49:59,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:49:59,338 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) [2021-05-21 20:49:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:59,562 INFO L93 Difference]: Finished difference Result 434 states and 1258 transitions. [2021-05-21 20:49:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:49:59,562 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 [2021-05-21 20:49:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:59,563 INFO L225 Difference]: With dead ends: 434 [2021-05-21 20:49:59,563 INFO L226 Difference]: Without dead ends: 415 [2021-05-21 20:49:59,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:49:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-21 20:49:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 296. [2021-05-21 20:49:59,566 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) [2021-05-21 20:49:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-05-21 20:49:59,567 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-05-21 20:49:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:59,567 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-05-21 20:49:59,567 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) [2021-05-21 20:49:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-05-21 20:49:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:49:59,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:59,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:59,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 20:49:59,768 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1410127391, now seen corresponding path program 19 times [2021-05-21 20:49:59,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:59,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117693778] [2021-05-21 20:49:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:59,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:59,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117693778] [2021-05-21 20:49:59,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117693778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:59,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929217108] [2021-05-21 20:49:59,833 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 [2021-05-21 20:49:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:59,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:49:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:49:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:59,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929217108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:49:59,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:49:59,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:49:59,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805095793] [2021-05-21 20:49:59,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:49:59,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:59,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:49:59,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:49:59,973 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) [2021-05-21 20:50:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:00,185 INFO L93 Difference]: Finished difference Result 468 states and 1339 transitions. [2021-05-21 20:50:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:00,186 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 [2021-05-21 20:50:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:00,186 INFO L225 Difference]: With dead ends: 468 [2021-05-21 20:50:00,186 INFO L226 Difference]: Without dead ends: 449 [2021-05-21 20:50:00,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-21 20:50:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 302. [2021-05-21 20:50:00,190 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) [2021-05-21 20:50:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 910 transitions. [2021-05-21 20:50:00,190 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 910 transitions. Word has length 18 [2021-05-21 20:50:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:00,190 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 910 transitions. [2021-05-21 20:50:00,190 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) [2021-05-21 20:50:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 910 transitions. [2021-05-21 20:50:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:00,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:00,191 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:00,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:00,391 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1565959223, now seen corresponding path program 20 times [2021-05-21 20:50:00,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:00,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358830569] [2021-05-21 20:50:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:00,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:00,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358830569] [2021-05-21 20:50:00,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358830569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:00,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756540967] [2021-05-21 20:50:00,461 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 [2021-05-21 20:50:00,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:00,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:00,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:00,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756540967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:00,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:00,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:00,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677617660] [2021-05-21 20:50:00,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:00,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:00,633 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) [2021-05-21 20:50:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:00,845 INFO L93 Difference]: Finished difference Result 479 states and 1352 transitions. [2021-05-21 20:50:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:00,845 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 [2021-05-21 20:50:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:00,846 INFO L225 Difference]: With dead ends: 479 [2021-05-21 20:50:00,846 INFO L226 Difference]: Without dead ends: 460 [2021-05-21 20:50:00,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-21 20:50:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 306. [2021-05-21 20:50:00,849 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) [2021-05-21 20:50:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-05-21 20:50:00,850 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-05-21 20:50:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:00,850 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-05-21 20:50:00,850 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) [2021-05-21 20:50:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-05-21 20:50:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:00,850 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:00,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:01,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:01,051 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash -635798047, now seen corresponding path program 21 times [2021-05-21 20:50:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:01,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16179361] [2021-05-21 20:50:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:01,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16179361] [2021-05-21 20:50:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16179361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009689844] [2021-05-21 20:50:01,106 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 [2021-05-21 20:50:01,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:01,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:01,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:01,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:01,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009689844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:01,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:01,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:01,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589772929] [2021-05-21 20:50:01,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:01,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:01,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:01,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:01,277 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) [2021-05-21 20:50:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:01,519 INFO L93 Difference]: Finished difference Result 442 states and 1266 transitions. [2021-05-21 20:50:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:01,519 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 [2021-05-21 20:50:01,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:01,519 INFO L225 Difference]: With dead ends: 442 [2021-05-21 20:50:01,520 INFO L226 Difference]: Without dead ends: 419 [2021-05-21 20:50:01,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-21 20:50:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 308. [2021-05-21 20:50:01,523 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) [2021-05-21 20:50:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-05-21 20:50:01,523 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 18 [2021-05-21 20:50:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:01,524 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-05-21 20:50:01,524 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) [2021-05-21 20:50:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-05-21 20:50:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:01,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:01,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:01,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:01,725 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1614261531, now seen corresponding path program 22 times [2021-05-21 20:50:01,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:01,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742430578] [2021-05-21 20:50:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:01,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:01,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742430578] [2021-05-21 20:50:01,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742430578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:01,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668905849] [2021-05-21 20:50:01,779 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 [2021-05-21 20:50:01,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:01,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:01,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:01,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668905849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:01,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:01,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:01,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478651537] [2021-05-21 20:50:01,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:01,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:01,909 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) [2021-05-21 20:50:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:02,068 INFO L93 Difference]: Finished difference Result 535 states and 1530 transitions. [2021-05-21 20:50:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:02,068 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 [2021-05-21 20:50:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:02,069 INFO L225 Difference]: With dead ends: 535 [2021-05-21 20:50:02,069 INFO L226 Difference]: Without dead ends: 516 [2021-05-21 20:50:02,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-21 20:50:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2021-05-21 20:50:02,073 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) [2021-05-21 20:50:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 914 transitions. [2021-05-21 20:50:02,074 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 914 transitions. Word has length 18 [2021-05-21 20:50:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:02,074 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 914 transitions. [2021-05-21 20:50:02,074 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) [2021-05-21 20:50:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 914 transitions. [2021-05-21 20:50:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:02,074 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:02,074 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:02,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-05-21 20:50:02,275 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1839327131, now seen corresponding path program 23 times [2021-05-21 20:50:02,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:02,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232730353] [2021-05-21 20:50:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:02,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:02,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232730353] [2021-05-21 20:50:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232730353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:02,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544885798] [2021-05-21 20:50:02,324 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 [2021-05-21 20:50:02,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:02,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:02,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:02,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544885798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:02,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:02,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:02,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829049718] [2021-05-21 20:50:02,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:02,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:02,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:02,443 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) [2021-05-21 20:50:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:02,601 INFO L93 Difference]: Finished difference Result 537 states and 1559 transitions. [2021-05-21 20:50:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:02,601 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 [2021-05-21 20:50:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:02,602 INFO L225 Difference]: With dead ends: 537 [2021-05-21 20:50:02,602 INFO L226 Difference]: Without dead ends: 518 [2021-05-21 20:50:02,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-21 20:50:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 307. [2021-05-21 20:50:02,606 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) [2021-05-21 20:50:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 934 transitions. [2021-05-21 20:50:02,606 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 934 transitions. Word has length 18 [2021-05-21 20:50:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:02,607 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 934 transitions. [2021-05-21 20:50:02,607 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) [2021-05-21 20:50:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 934 transitions. [2021-05-21 20:50:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:02,607 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:02,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:02,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:02,808 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:02,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:02,808 INFO L82 PathProgramCache]: Analyzing trace with hash 756919777, now seen corresponding path program 24 times [2021-05-21 20:50:02,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:02,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830056572] [2021-05-21 20:50:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:02,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830056572] [2021-05-21 20:50:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830056572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052502654] [2021-05-21 20:50:02,850 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 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 [2021-05-21 20:50:02,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:02,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:02,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:02,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052502654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:02,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:02,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:50:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133290608] [2021-05-21 20:50:02,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:02,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:02,962 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) [2021-05-21 20:50:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:03,093 INFO L93 Difference]: Finished difference Result 500 states and 1473 transitions. [2021-05-21 20:50:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:03,094 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 [2021-05-21 20:50:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:03,094 INFO L225 Difference]: With dead ends: 500 [2021-05-21 20:50:03,094 INFO L226 Difference]: Without dead ends: 481 [2021-05-21 20:50:03,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-05-21 20:50:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 299. [2021-05-21 20:50:03,098 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) [2021-05-21 20:50:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-21 20:50:03,098 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-21 20:50:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:03,098 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-21 20:50:03,098 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) [2021-05-21 20:50:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-21 20:50:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:03,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:03,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:03,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-21 20:50:03,308 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1237003341, now seen corresponding path program 25 times [2021-05-21 20:50:03,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:03,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599813769] [2021-05-21 20:50:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:03,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:03,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599813769] [2021-05-21 20:50:03,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599813769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:03,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958471407] [2021-05-21 20:50:03,370 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 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 [2021-05-21 20:50:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:03,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:03,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:03,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958471407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:03,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:03,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:03,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391915911] [2021-05-21 20:50:03,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:03,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:03,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:03,510 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) [2021-05-21 20:50:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:03,705 INFO L93 Difference]: Finished difference Result 506 states and 1446 transitions. [2021-05-21 20:50:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:03,705 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 [2021-05-21 20:50:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:03,706 INFO L225 Difference]: With dead ends: 506 [2021-05-21 20:50:03,706 INFO L226 Difference]: Without dead ends: 487 [2021-05-21 20:50:03,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-05-21 20:50:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-05-21 20:50:03,710 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) [2021-05-21 20:50:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 925 transitions. [2021-05-21 20:50:03,711 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 925 transitions. Word has length 18 [2021-05-21 20:50:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:03,711 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 925 transitions. [2021-05-21 20:50:03,711 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) [2021-05-21 20:50:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 925 transitions. [2021-05-21 20:50:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:03,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:03,712 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:03,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-21 20:50:03,935 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2127802779, now seen corresponding path program 26 times [2021-05-21 20:50:03,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:03,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500969715] [2021-05-21 20:50:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:03,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:03,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500969715] [2021-05-21 20:50:03,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500969715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:03,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832068310] [2021-05-21 20:50:03,982 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 [2021-05-21 20:50:04,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:04,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:04,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832068310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:04,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:04,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:04,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726181092] [2021-05-21 20:50:04,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:04,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:04,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:04,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:04,121 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) [2021-05-21 20:50:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:04,294 INFO L93 Difference]: Finished difference Result 494 states and 1406 transitions. [2021-05-21 20:50:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:04,295 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 [2021-05-21 20:50:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:04,295 INFO L225 Difference]: With dead ends: 494 [2021-05-21 20:50:04,295 INFO L226 Difference]: Without dead ends: 471 [2021-05-21 20:50:04,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-21 20:50:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 307. [2021-05-21 20:50:04,299 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) [2021-05-21 20:50:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-05-21 20:50:04,300 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 18 [2021-05-21 20:50:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:04,300 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-05-21 20:50:04,300 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) [2021-05-21 20:50:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-05-21 20:50:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:04,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:04,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:04,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-21 20:50:04,501 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1507513033, now seen corresponding path program 27 times [2021-05-21 20:50:04,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:04,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722974043] [2021-05-21 20:50:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:04,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722974043] [2021-05-21 20:50:04,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722974043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489106447] [2021-05-21 20:50:04,565 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 [2021-05-21 20:50:04,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:04,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489106447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:04,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:04,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:04,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551866792] [2021-05-21 20:50:04,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:04,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:04,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:04,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:04,711 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) [2021-05-21 20:50:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:04,936 INFO L93 Difference]: Finished difference Result 509 states and 1449 transitions. [2021-05-21 20:50:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:04,936 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 [2021-05-21 20:50:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:04,937 INFO L225 Difference]: With dead ends: 509 [2021-05-21 20:50:04,937 INFO L226 Difference]: Without dead ends: 490 [2021-05-21 20:50:04,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-21 20:50:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-05-21 20:50:04,941 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) [2021-05-21 20:50:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 923 transitions. [2021-05-21 20:50:04,942 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 923 transitions. Word has length 18 [2021-05-21 20:50:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:04,942 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 923 transitions. [2021-05-21 20:50:04,942 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) [2021-05-21 20:50:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 923 transitions. [2021-05-21 20:50:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:04,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:04,942 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:05,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:05,143 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1326384585, now seen corresponding path program 28 times [2021-05-21 20:50:05,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:05,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602399042] [2021-05-21 20:50:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:05,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602399042] [2021-05-21 20:50:05,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602399042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291517578] [2021-05-21 20:50:05,186 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 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 [2021-05-21 20:50:05,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:05,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:05,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291517578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:05,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:05,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:05,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175247584] [2021-05-21 20:50:05,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:05,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:05,303 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) [2021-05-21 20:50:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:05,434 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-05-21 20:50:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:05,435 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 [2021-05-21 20:50:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:05,435 INFO L225 Difference]: With dead ends: 490 [2021-05-21 20:50:05,435 INFO L226 Difference]: Without dead ends: 471 [2021-05-21 20:50:05,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-21 20:50:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 300. [2021-05-21 20:50:05,439 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) [2021-05-21 20:50:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 903 transitions. [2021-05-21 20:50:05,439 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 903 transitions. Word has length 18 [2021-05-21 20:50:05,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:05,439 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 903 transitions. [2021-05-21 20:50:05,439 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) [2021-05-21 20:50:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 903 transitions. [2021-05-21 20:50:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:05,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:05,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:05,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-21 20:50:05,640 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash -554908191, now seen corresponding path program 29 times [2021-05-21 20:50:05,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:05,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596250550] [2021-05-21 20:50:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:05,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596250550] [2021-05-21 20:50:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596250550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120654599] [2021-05-21 20:50:05,693 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 [2021-05-21 20:50:05,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:05,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:05,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:05,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120654599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:05,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:05,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:05,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638335680] [2021-05-21 20:50:05,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:05,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:05,822 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) [2021-05-21 20:50:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:06,036 INFO L93 Difference]: Finished difference Result 447 states and 1285 transitions. [2021-05-21 20:50:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:06,037 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 [2021-05-21 20:50:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:06,037 INFO L225 Difference]: With dead ends: 447 [2021-05-21 20:50:06,037 INFO L226 Difference]: Without dead ends: 424 [2021-05-21 20:50:06,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-21 20:50:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 308. [2021-05-21 20:50:06,041 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) [2021-05-21 20:50:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 925 transitions. [2021-05-21 20:50:06,041 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 925 transitions. Word has length 18 [2021-05-21 20:50:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:06,041 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 925 transitions. [2021-05-21 20:50:06,041 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) [2021-05-21 20:50:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 925 transitions. [2021-05-21 20:50:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:06,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:06,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:06,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-21 20:50:06,245 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 423649253, now seen corresponding path program 30 times [2021-05-21 20:50:06,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:06,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311712975] [2021-05-21 20:50:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311712975] [2021-05-21 20:50:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311712975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708284848] [2021-05-21 20:50:06,294 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 [2021-05-21 20:50:06,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:06,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:06,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:06,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708284848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:06,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:06,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:06,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517247113] [2021-05-21 20:50:06,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:06,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:06,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:06,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:06,418 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) [2021-05-21 20:50:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:06,617 INFO L93 Difference]: Finished difference Result 431 states and 1255 transitions. [2021-05-21 20:50:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:06,618 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 [2021-05-21 20:50:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:06,618 INFO L225 Difference]: With dead ends: 431 [2021-05-21 20:50:06,618 INFO L226 Difference]: Without dead ends: 412 [2021-05-21 20:50:06,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-21 20:50:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 299. [2021-05-21 20:50:06,621 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) [2021-05-21 20:50:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-21 20:50:06,622 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-21 20:50:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:06,622 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-21 20:50:06,622 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) [2021-05-21 20:50:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-21 20:50:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:06,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:06,622 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:06,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-21 20:50:06,823 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:06,823 INFO L82 PathProgramCache]: Analyzing trace with hash 427729059, now seen corresponding path program 31 times [2021-05-21 20:50:06,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:06,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819418588] [2021-05-21 20:50:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:06,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:06,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819418588] [2021-05-21 20:50:06,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819418588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:06,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352828451] [2021-05-21 20:50:06,868 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 [2021-05-21 20:50:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:06,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:06,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352828451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:06,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:06,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:06,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133255407] [2021-05-21 20:50:06,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:06,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:06,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:06,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:06,991 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) [2021-05-21 20:50:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:07,130 INFO L93 Difference]: Finished difference Result 569 states and 1629 transitions. [2021-05-21 20:50:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:07,130 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 [2021-05-21 20:50:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:07,131 INFO L225 Difference]: With dead ends: 569 [2021-05-21 20:50:07,131 INFO L226 Difference]: Without dead ends: 550 [2021-05-21 20:50:07,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-21 20:50:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 306. [2021-05-21 20:50:07,135 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) [2021-05-21 20:50:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-05-21 20:50:07,136 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-05-21 20:50:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:07,136 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-05-21 20:50:07,136 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) [2021-05-21 20:50:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-05-21 20:50:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:07,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:07,136 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:07,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-21 20:50:07,337 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1635282131, now seen corresponding path program 32 times [2021-05-21 20:50:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:07,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502352110] [2021-05-21 20:50:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:07,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:07,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502352110] [2021-05-21 20:50:07,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502352110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:07,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133343834] [2021-05-21 20:50:07,390 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 [2021-05-21 20:50:07,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:07,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:07,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133343834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:07,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:07,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:50:07,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948250769] [2021-05-21 20:50:07,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:07,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:07,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:07,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:07,488 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) [2021-05-21 20:50:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:07,609 INFO L93 Difference]: Finished difference Result 581 states and 1668 transitions. [2021-05-21 20:50:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:07,609 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 [2021-05-21 20:50:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:07,610 INFO L225 Difference]: With dead ends: 581 [2021-05-21 20:50:07,610 INFO L226 Difference]: Without dead ends: 562 [2021-05-21 20:50:07,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-05-21 20:50:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 310. [2021-05-21 20:50:07,614 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) [2021-05-21 20:50:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 946 transitions. [2021-05-21 20:50:07,614 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 946 transitions. Word has length 18 [2021-05-21 20:50:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:07,614 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 946 transitions. [2021-05-21 20:50:07,614 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) [2021-05-21 20:50:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 946 transitions. [2021-05-21 20:50:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:07,615 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:07,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:07,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:07,815 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:07,816 INFO L82 PathProgramCache]: Analyzing trace with hash -63438257, now seen corresponding path program 33 times [2021-05-21 20:50:07,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:07,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36523206] [2021-05-21 20:50:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:07,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:07,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36523206] [2021-05-21 20:50:07,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36523206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:07,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379869199] [2021-05-21 20:50:07,863 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 [2021-05-21 20:50:07,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:07,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:08,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379869199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:08,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:08,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:08,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280444490] [2021-05-21 20:50:08,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:08,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:08,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:08,004 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) [2021-05-21 20:50:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:08,166 INFO L93 Difference]: Finished difference Result 590 states and 1691 transitions. [2021-05-21 20:50:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:08,166 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 [2021-05-21 20:50:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:08,167 INFO L225 Difference]: With dead ends: 590 [2021-05-21 20:50:08,167 INFO L226 Difference]: Without dead ends: 571 [2021-05-21 20:50:08,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-21 20:50:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 299. [2021-05-21 20:50:08,172 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) [2021-05-21 20:50:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-21 20:50:08,173 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-21 20:50:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:08,173 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-21 20:50:08,173 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) [2021-05-21 20:50:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-21 20:50:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:08,174 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:08,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:08,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:08,389 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1646468570, now seen corresponding path program 4 times [2021-05-21 20:50:08,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:08,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222800661] [2021-05-21 20:50:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:08,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:08,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222800661] [2021-05-21 20:50:08,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222800661] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:08,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:08,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:08,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861028420] [2021-05-21 20:50:08,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:08,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:08,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:08,430 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) [2021-05-21 20:50:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:08,501 INFO L93 Difference]: Finished difference Result 429 states and 1249 transitions. [2021-05-21 20:50:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:50:08,501 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 [2021-05-21 20:50:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:08,502 INFO L225 Difference]: With dead ends: 429 [2021-05-21 20:50:08,502 INFO L226 Difference]: Without dead ends: 358 [2021-05-21 20:50:08,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-21 20:50:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 294. [2021-05-21 20:50:08,505 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) [2021-05-21 20:50:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-05-21 20:50:08,505 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-05-21 20:50:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:08,505 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-05-21 20:50:08,506 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) [2021-05-21 20:50:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-05-21 20:50:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:08,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:08,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:08,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-05-21 20:50:08,506 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash -269670517, now seen corresponding path program 34 times [2021-05-21 20:50:08,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:08,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149946635] [2021-05-21 20:50:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:08,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:08,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149946635] [2021-05-21 20:50:08,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149946635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:08,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209335771] [2021-05-21 20:50:08,580 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 [2021-05-21 20:50:08,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:08,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209335771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:08,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:08,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:08,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139884617] [2021-05-21 20:50:08,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:08,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:08,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:08,699 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) [2021-05-21 20:50:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:08,897 INFO L93 Difference]: Finished difference Result 648 states and 1820 transitions. [2021-05-21 20:50:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:08,897 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 [2021-05-21 20:50:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:08,898 INFO L225 Difference]: With dead ends: 648 [2021-05-21 20:50:08,898 INFO L226 Difference]: Without dead ends: 629 [2021-05-21 20:50:08,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-21 20:50:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 298. [2021-05-21 20:50:08,902 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) [2021-05-21 20:50:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 889 transitions. [2021-05-21 20:50:08,902 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 889 transitions. Word has length 18 [2021-05-21 20:50:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:08,903 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 889 transitions. [2021-05-21 20:50:08,903 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) [2021-05-21 20:50:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 889 transitions. [2021-05-21 20:50:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:08,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:08,903 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:09,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-21 20:50:09,104 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash -472443849, now seen corresponding path program 35 times [2021-05-21 20:50:09,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:09,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106233437] [2021-05-21 20:50:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:09,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:09,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106233437] [2021-05-21 20:50:09,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106233437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:09,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955131529] [2021-05-21 20:50:09,160 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 [2021-05-21 20:50:09,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:09,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:09,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:09,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:09,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955131529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:09,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:09,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409882468] [2021-05-21 20:50:09,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:09,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:09,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:09,309 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) [2021-05-21 20:50:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:09,545 INFO L93 Difference]: Finished difference Result 606 states and 1708 transitions. [2021-05-21 20:50:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:09,545 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 [2021-05-21 20:50:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:09,546 INFO L225 Difference]: With dead ends: 606 [2021-05-21 20:50:09,546 INFO L226 Difference]: Without dead ends: 583 [2021-05-21 20:50:09,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-21 20:50:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 306. [2021-05-21 20:50:09,550 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) [2021-05-21 20:50:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 911 transitions. [2021-05-21 20:50:09,551 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 911 transitions. Word has length 18 [2021-05-21 20:50:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:09,551 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 911 transitions. [2021-05-21 20:50:09,551 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) [2021-05-21 20:50:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 911 transitions. [2021-05-21 20:50:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:09,551 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:09,551 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:09,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-21 20:50:09,752 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:09,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1687803469, now seen corresponding path program 36 times [2021-05-21 20:50:09,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:09,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66304029] [2021-05-21 20:50:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:09,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66304029] [2021-05-21 20:50:09,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66304029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900175627] [2021-05-21 20:50:09,809 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 [2021-05-21 20:50:09,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:09,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900175627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:09,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:09,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:09,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021788723] [2021-05-21 20:50:09,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:09,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:09,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:09,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:09,943 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) [2021-05-21 20:50:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:10,152 INFO L93 Difference]: Finished difference Result 590 states and 1678 transitions. [2021-05-21 20:50:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:10,152 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 [2021-05-21 20:50:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:10,153 INFO L225 Difference]: With dead ends: 590 [2021-05-21 20:50:10,153 INFO L226 Difference]: Without dead ends: 571 [2021-05-21 20:50:10,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-21 20:50:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 294. [2021-05-21 20:50:10,157 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) [2021-05-21 20:50:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-05-21 20:50:10,157 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-05-21 20:50:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:10,157 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-05-21 20:50:10,157 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) [2021-05-21 20:50:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-05-21 20:50:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:10,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:10,158 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:10,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-21 20:50:10,358 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1039285976, now seen corresponding path program 5 times [2021-05-21 20:50:10,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:10,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537211072] [2021-05-21 20:50:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:10,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537211072] [2021-05-21 20:50:10,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537211072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107671074] [2021-05-21 20:50:10,396 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 [2021-05-21 20:50:10,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:10,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:10,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:10,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107671074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:10,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:10,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:50:10,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559403102] [2021-05-21 20:50:10,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:10,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:10,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:10,486 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) [2021-05-21 20:50:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:10,537 INFO L93 Difference]: Finished difference Result 448 states and 1287 transitions. [2021-05-21 20:50:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:50:10,537 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 [2021-05-21 20:50:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:10,538 INFO L225 Difference]: With dead ends: 448 [2021-05-21 20:50:10,538 INFO L226 Difference]: Without dead ends: 391 [2021-05-21 20:50:10,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-21 20:50:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 287. [2021-05-21 20:50:10,541 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) [2021-05-21 20:50:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 846 transitions. [2021-05-21 20:50:10,542 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 846 transitions. Word has length 18 [2021-05-21 20:50:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:10,542 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 846 transitions. [2021-05-21 20:50:10,542 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) [2021-05-21 20:50:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 846 transitions. [2021-05-21 20:50:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:10,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:10,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:10,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-21 20:50:10,743 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash -603032005, now seen corresponding path program 37 times [2021-05-21 20:50:10,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:10,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121774952] [2021-05-21 20:50:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:10,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:10,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121774952] [2021-05-21 20:50:10,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121774952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:10,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854487536] [2021-05-21 20:50:10,797 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 [2021-05-21 20:50:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:10,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:10,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:10,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854487536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:10,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:10,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 20:50:10,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160773386] [2021-05-21 20:50:10,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:10,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:10,898 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) [2021-05-21 20:50:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:11,057 INFO L93 Difference]: Finished difference Result 610 states and 1732 transitions. [2021-05-21 20:50:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:11,057 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 [2021-05-21 20:50:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:11,058 INFO L225 Difference]: With dead ends: 610 [2021-05-21 20:50:11,058 INFO L226 Difference]: Without dead ends: 591 [2021-05-21 20:50:11,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-21 20:50:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 293. [2021-05-21 20:50:11,062 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) [2021-05-21 20:50:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 873 transitions. [2021-05-21 20:50:11,062 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 873 transitions. Word has length 18 [2021-05-21 20:50:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:11,062 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 873 transitions. [2021-05-21 20:50:11,062 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) [2021-05-21 20:50:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 873 transitions. [2021-05-21 20:50:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:11,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:11,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:11,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:11,263 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 327129171, now seen corresponding path program 38 times [2021-05-21 20:50:11,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:11,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108070657] [2021-05-21 20:50:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:11,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:11,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108070657] [2021-05-21 20:50:11,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108070657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:11,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490556829] [2021-05-21 20:50:11,314 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 [2021-05-21 20:50:11,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:11,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:11,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:11,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490556829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:11,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:11,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:11,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415057867] [2021-05-21 20:50:11,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:11,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:11,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:11,433 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) [2021-05-21 20:50:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:11,638 INFO L93 Difference]: Finished difference Result 598 states and 1692 transitions. [2021-05-21 20:50:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:11,639 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 [2021-05-21 20:50:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:11,640 INFO L225 Difference]: With dead ends: 598 [2021-05-21 20:50:11,640 INFO L226 Difference]: Without dead ends: 575 [2021-05-21 20:50:11,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-05-21 20:50:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 295. [2021-05-21 20:50:11,645 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) [2021-05-21 20:50:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-05-21 20:50:11,646 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-05-21 20:50:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:11,646 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-05-21 20:50:11,646 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) [2021-05-21 20:50:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-05-21 20:50:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:11,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:11,647 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:11,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:11,870 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:11,870 INFO L82 PathProgramCache]: Analyzing trace with hash -332522313, now seen corresponding path program 39 times [2021-05-21 20:50:11,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:11,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382262288] [2021-05-21 20:50:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:11,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:11,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382262288] [2021-05-21 20:50:11,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382262288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:11,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011007260] [2021-05-21 20:50:11,932 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 [2021-05-21 20:50:11,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:12,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011007260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:12,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:12,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-21 20:50:12,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140833707] [2021-05-21 20:50:12,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:50:12,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:12,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:50:12,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:12,090 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) [2021-05-21 20:50:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:12,329 INFO L93 Difference]: Finished difference Result 653 states and 1829 transitions. [2021-05-21 20:50:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:12,329 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 [2021-05-21 20:50:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:12,330 INFO L225 Difference]: With dead ends: 653 [2021-05-21 20:50:12,330 INFO L226 Difference]: Without dead ends: 634 [2021-05-21 20:50:12,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-05-21 20:50:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 292. [2021-05-21 20:50:12,334 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) [2021-05-21 20:50:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 871 transitions. [2021-05-21 20:50:12,335 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 871 transitions. Word has length 18 [2021-05-21 20:50:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:12,335 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 871 transitions. [2021-05-21 20:50:12,335 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) [2021-05-21 20:50:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 871 transitions. [2021-05-21 20:50:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:12,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:12,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:12,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:12,536 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash -513650761, now seen corresponding path program 40 times [2021-05-21 20:50:12,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:12,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772587468] [2021-05-21 20:50:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:12,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:12,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772587468] [2021-05-21 20:50:12,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772587468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:12,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625139160] [2021-05-21 20:50:12,589 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 [2021-05-21 20:50:12,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:12,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625139160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:12,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:12,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:12,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136258863] [2021-05-21 20:50:12,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:12,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:12,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:12,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:12,717 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) [2021-05-21 20:50:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:12,871 INFO L93 Difference]: Finished difference Result 634 states and 1800 transitions. [2021-05-21 20:50:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:12,872 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 [2021-05-21 20:50:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:12,873 INFO L225 Difference]: With dead ends: 634 [2021-05-21 20:50:12,873 INFO L226 Difference]: Without dead ends: 615 [2021-05-21 20:50:12,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-05-21 20:50:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 288. [2021-05-21 20:50:12,876 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) [2021-05-21 20:50:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 851 transitions. [2021-05-21 20:50:12,877 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 851 transitions. Word has length 18 [2021-05-21 20:50:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:12,877 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 851 transitions. [2021-05-21 20:50:12,877 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) [2021-05-21 20:50:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 851 transitions. [2021-05-21 20:50:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:12,878 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:12,878 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:13,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:13,078 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1900023759, now seen corresponding path program 41 times [2021-05-21 20:50:13,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:13,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711913788] [2021-05-21 20:50:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:13,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:13,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711913788] [2021-05-21 20:50:13,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711913788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:13,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201010531] [2021-05-21 20:50:13,124 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 [2021-05-21 20:50:13,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:13,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:13,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201010531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:13,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:13,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:13,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238525465] [2021-05-21 20:50:13,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:13,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:13,240 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) [2021-05-21 20:50:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:13,501 INFO L93 Difference]: Finished difference Result 606 states and 1702 transitions. [2021-05-21 20:50:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:13,501 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 [2021-05-21 20:50:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:13,503 INFO L225 Difference]: With dead ends: 606 [2021-05-21 20:50:13,503 INFO L226 Difference]: Without dead ends: 583 [2021-05-21 20:50:13,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-21 20:50:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 296. [2021-05-21 20:50:13,508 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) [2021-05-21 20:50:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 873 transitions. [2021-05-21 20:50:13,509 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 873 transitions. Word has length 18 [2021-05-21 20:50:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:13,509 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 873 transitions. [2021-05-21 20:50:13,509 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) [2021-05-21 20:50:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 873 transitions. [2021-05-21 20:50:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:13,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:13,510 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:13,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-21 20:50:13,725 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1416386093, now seen corresponding path program 42 times [2021-05-21 20:50:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:13,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034538888] [2021-05-21 20:50:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:13,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:13,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034538888] [2021-05-21 20:50:13,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034538888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:13,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998315816] [2021-05-21 20:50:13,771 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 [2021-05-21 20:50:13,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:13,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:13,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998315816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:13,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:13,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:13,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881017487] [2021-05-21 20:50:13,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:13,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:13,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:13,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:13,884 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) [2021-05-21 20:50:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:14,075 INFO L93 Difference]: Finished difference Result 590 states and 1672 transitions. [2021-05-21 20:50:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:14,075 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 [2021-05-21 20:50:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:14,076 INFO L225 Difference]: With dead ends: 590 [2021-05-21 20:50:14,076 INFO L226 Difference]: Without dead ends: 571 [2021-05-21 20:50:14,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-21 20:50:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 285. [2021-05-21 20:50:14,080 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) [2021-05-21 20:50:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-05-21 20:50:14,080 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-05-21 20:50:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:14,080 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-05-21 20:50:14,080 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) [2021-05-21 20:50:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-05-21 20:50:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:14,081 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:14,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:14,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-05-21 20:50:14,281 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1542604225, now seen corresponding path program 43 times [2021-05-21 20:50:14,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:14,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281262298] [2021-05-21 20:50:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:14,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281262298] [2021-05-21 20:50:14,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281262298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944176261] [2021-05-21 20:50:14,347 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 [2021-05-21 20:50:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:14,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944176261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:14,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:14,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:14,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944721153] [2021-05-21 20:50:14,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:14,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:14,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:14,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:14,478 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) [2021-05-21 20:50:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:14,720 INFO L93 Difference]: Finished difference Result 479 states and 1339 transitions. [2021-05-21 20:50:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:14,720 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 [2021-05-21 20:50:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:14,721 INFO L225 Difference]: With dead ends: 479 [2021-05-21 20:50:14,721 INFO L226 Difference]: Without dead ends: 460 [2021-05-21 20:50:14,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-21 20:50:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 289. [2021-05-21 20:50:14,724 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) [2021-05-21 20:50:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 848 transitions. [2021-05-21 20:50:14,725 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 848 transitions. Word has length 18 [2021-05-21 20:50:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:14,725 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 848 transitions. [2021-05-21 20:50:14,725 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) [2021-05-21 20:50:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 848 transitions. [2021-05-21 20:50:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:14,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:14,726 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:14,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:14,926 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:14,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1745377557, now seen corresponding path program 44 times [2021-05-21 20:50:14,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:14,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44868373] [2021-05-21 20:50:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:14,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:14,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44868373] [2021-05-21 20:50:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44868373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:14,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148107013] [2021-05-21 20:50:14,977 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 [2021-05-21 20:50:15,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:15,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:15,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:15,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148107013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:15,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:15,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:15,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309691947] [2021-05-21 20:50:15,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:15,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:15,117 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) [2021-05-21 20:50:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:15,368 INFO L93 Difference]: Finished difference Result 485 states and 1345 transitions. [2021-05-21 20:50:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:15,368 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 [2021-05-21 20:50:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:15,369 INFO L225 Difference]: With dead ends: 485 [2021-05-21 20:50:15,369 INFO L226 Difference]: Without dead ends: 462 [2021-05-21 20:50:15,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-05-21 20:50:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 297. [2021-05-21 20:50:15,372 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) [2021-05-21 20:50:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 870 transitions. [2021-05-21 20:50:15,372 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 870 transitions. Word has length 18 [2021-05-21 20:50:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:15,372 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 870 transitions. [2021-05-21 20:50:15,373 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) [2021-05-21 20:50:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 870 transitions. [2021-05-21 20:50:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:15,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:15,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:15,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-05-21 20:50:15,573 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1334230119, now seen corresponding path program 45 times [2021-05-21 20:50:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:15,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355601812] [2021-05-21 20:50:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:15,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:15,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355601812] [2021-05-21 20:50:15,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355601812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:15,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619995903] [2021-05-21 20:50:15,623 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 [2021-05-21 20:50:15,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:15,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:15,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:15,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619995903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:15,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:15,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290306458] [2021-05-21 20:50:15,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:15,751 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) [2021-05-21 20:50:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:15,998 INFO L93 Difference]: Finished difference Result 469 states and 1315 transitions. [2021-05-21 20:50:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:15,998 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 [2021-05-21 20:50:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:15,999 INFO L225 Difference]: With dead ends: 469 [2021-05-21 20:50:15,999 INFO L226 Difference]: Without dead ends: 450 [2021-05-21 20:50:15,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-21 20:50:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 285. [2021-05-21 20:50:16,002 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) [2021-05-21 20:50:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-05-21 20:50:16,002 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-05-21 20:50:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:16,002 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-05-21 20:50:16,002 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) [2021-05-21 20:50:16,002 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-05-21 20:50:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:16,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:16,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:16,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-05-21 20:50:16,205 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1633409787, now seen corresponding path program 46 times [2021-05-21 20:50:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:16,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44669963] [2021-05-21 20:50:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:16,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:16,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44669963] [2021-05-21 20:50:16,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44669963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:16,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041484729] [2021-05-21 20:50:16,261 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 [2021-05-21 20:50:16,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:16,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:16,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:16,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041484729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:16,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:16,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:16,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933767369] [2021-05-21 20:50:16,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:16,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:16,376 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) [2021-05-21 20:50:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:16,617 INFO L93 Difference]: Finished difference Result 433 states and 1220 transitions. [2021-05-21 20:50:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:16,618 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 [2021-05-21 20:50:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:16,618 INFO L225 Difference]: With dead ends: 433 [2021-05-21 20:50:16,618 INFO L226 Difference]: Without dead ends: 406 [2021-05-21 20:50:16,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-21 20:50:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 287. [2021-05-21 20:50:16,622 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) [2021-05-21 20:50:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 843 transitions. [2021-05-21 20:50:16,623 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 843 transitions. Word has length 18 [2021-05-21 20:50:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:16,623 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 843 transitions. [2021-05-21 20:50:16,623 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) [2021-05-21 20:50:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 843 transitions. [2021-05-21 20:50:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:16,623 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:16,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:16,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:16,824 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash 44908247, now seen corresponding path program 6 times [2021-05-21 20:50:16,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:16,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080833789] [2021-05-21 20:50:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:16,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:16,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080833789] [2021-05-21 20:50:16,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080833789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:16,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511903788] [2021-05-21 20:50:16,864 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 [2021-05-21 20:50:16,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:16,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:50:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:16,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511903788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:16,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:16,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:16,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935559175] [2021-05-21 20:50:16,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:16,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:16,958 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) [2021-05-21 20:50:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:17,128 INFO L93 Difference]: Finished difference Result 476 states and 1332 transitions. [2021-05-21 20:50:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:17,128 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 [2021-05-21 20:50:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:17,129 INFO L225 Difference]: With dead ends: 476 [2021-05-21 20:50:17,129 INFO L226 Difference]: Without dead ends: 454 [2021-05-21 20:50:17,129 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 [2021-05-21 20:50:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-21 20:50:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 289. [2021-05-21 20:50:17,133 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) [2021-05-21 20:50:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-05-21 20:50:17,134 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-05-21 20:50:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:17,134 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-05-21 20:50:17,134 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) [2021-05-21 20:50:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-05-21 20:50:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:17,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:17,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:17,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-05-21 20:50:17,337 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:17,337 INFO L82 PathProgramCache]: Analyzing trace with hash -675858551, now seen corresponding path program 47 times [2021-05-21 20:50:17,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:17,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040677553] [2021-05-21 20:50:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:17,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:17,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040677553] [2021-05-21 20:50:17,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040677553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:17,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787621680] [2021-05-21 20:50:17,388 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 [2021-05-21 20:50:17,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:17,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:17,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:17,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787621680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:17,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:17,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:17,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798628723] [2021-05-21 20:50:17,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:17,499 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) [2021-05-21 20:50:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:17,735 INFO L93 Difference]: Finished difference Result 434 states and 1224 transitions. [2021-05-21 20:50:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:17,735 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 [2021-05-21 20:50:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:17,736 INFO L225 Difference]: With dead ends: 434 [2021-05-21 20:50:17,736 INFO L226 Difference]: Without dead ends: 411 [2021-05-21 20:50:17,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-21 20:50:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 297. [2021-05-21 20:50:17,739 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) [2021-05-21 20:50:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-05-21 20:50:17,739 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-05-21 20:50:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:17,739 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-05-21 20:50:17,739 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) [2021-05-21 20:50:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-05-21 20:50:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:17,740 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:17,740 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:17,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:17,940 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash 438614075, now seen corresponding path program 7 times [2021-05-21 20:50:17,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:17,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881744959] [2021-05-21 20:50:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:17,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881744959] [2021-05-21 20:50:17,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881744959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043490730] [2021-05-21 20:50:17,984 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 [2021-05-21 20:50:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:18,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:50:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:18,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043490730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:18,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:18,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:18,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443175665] [2021-05-21 20:50:18,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:18,078 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) [2021-05-21 20:50:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:18,202 INFO L93 Difference]: Finished difference Result 491 states and 1363 transitions. [2021-05-21 20:50:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:18,202 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 [2021-05-21 20:50:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:18,203 INFO L225 Difference]: With dead ends: 491 [2021-05-21 20:50:18,203 INFO L226 Difference]: Without dead ends: 469 [2021-05-21 20:50:18,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-21 20:50:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 297. [2021-05-21 20:50:18,207 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) [2021-05-21 20:50:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-05-21 20:50:18,207 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-05-21 20:50:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:18,207 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-05-21 20:50:18,207 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) [2021-05-21 20:50:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-05-21 20:50:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:18,207 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:18,208 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:18,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2021-05-21 20:50:18,408 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1891218171, now seen corresponding path program 48 times [2021-05-21 20:50:18,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:18,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049195528] [2021-05-21 20:50:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:18,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049195528] [2021-05-21 20:50:18,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049195528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069893812] [2021-05-21 20:50:18,470 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 [2021-05-21 20:50:18,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:18,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069893812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:18,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:18,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:18,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588696620] [2021-05-21 20:50:18,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:18,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:18,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:18,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:18,599 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) [2021-05-21 20:50:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:18,874 INFO L93 Difference]: Finished difference Result 409 states and 1172 transitions. [2021-05-21 20:50:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:18,874 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 [2021-05-21 20:50:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:18,875 INFO L225 Difference]: With dead ends: 409 [2021-05-21 20:50:18,875 INFO L226 Difference]: Without dead ends: 390 [2021-05-21 20:50:18,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-21 20:50:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 291. [2021-05-21 20:50:18,878 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) [2021-05-21 20:50:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-05-21 20:50:18,878 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 18 [2021-05-21 20:50:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:18,878 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-05-21 20:50:18,878 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) [2021-05-21 20:50:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-05-21 20:50:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:18,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:18,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:19,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-21 20:50:19,079 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1494230001, now seen corresponding path program 8 times [2021-05-21 20:50:19,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:19,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548612990] [2021-05-21 20:50:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:19,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:19,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548612990] [2021-05-21 20:50:19,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548612990] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:19,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:19,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 20:50:19,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998625720] [2021-05-21 20:50:19,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:19,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:19,123 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) [2021-05-21 20:50:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:19,240 INFO L93 Difference]: Finished difference Result 449 states and 1262 transitions. [2021-05-21 20:50:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:19,240 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 [2021-05-21 20:50:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:19,241 INFO L225 Difference]: With dead ends: 449 [2021-05-21 20:50:19,241 INFO L226 Difference]: Without dead ends: 420 [2021-05-21 20:50:19,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-21 20:50:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 289. [2021-05-21 20:50:19,244 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) [2021-05-21 20:50:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-05-21 20:50:19,245 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-05-21 20:50:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:19,245 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-05-21 20:50:19,245 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) [2021-05-21 20:50:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-05-21 20:50:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:19,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:19,245 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:19,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-05-21 20:50:19,245 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1770591994, now seen corresponding path program 6 times [2021-05-21 20:50:19,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:19,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572177789] [2021-05-21 20:50:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:19,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572177789] [2021-05-21 20:50:19,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572177789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646762509] [2021-05-21 20:50:19,271 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 [2021-05-21 20:50:19,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:19,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:19,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:50:19,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:19,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646762509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:19,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:19,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-21 20:50:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829220469] [2021-05-21 20:50:19,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:19,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:19,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:19,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:19,366 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) [2021-05-21 20:50:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:19,478 INFO L93 Difference]: Finished difference Result 435 states and 1232 transitions. [2021-05-21 20:50:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:19,478 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 [2021-05-21 20:50:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:19,479 INFO L225 Difference]: With dead ends: 435 [2021-05-21 20:50:19,479 INFO L226 Difference]: Without dead ends: 347 [2021-05-21 20:50:19,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-21 20:50:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 255. [2021-05-21 20:50:19,482 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) [2021-05-21 20:50:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 757 transitions. [2021-05-21 20:50:19,482 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 757 transitions. Word has length 18 [2021-05-21 20:50:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:19,482 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 757 transitions. [2021-05-21 20:50:19,482 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) [2021-05-21 20:50:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 757 transitions. [2021-05-21 20:50:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:19,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:19,483 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:19,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:19,707 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash 698798277, now seen corresponding path program 49 times [2021-05-21 20:50:19,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:19,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450874921] [2021-05-21 20:50:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:19,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:19,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450874921] [2021-05-21 20:50:19,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450874921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:19,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356530776] [2021-05-21 20:50:19,777 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 [2021-05-21 20:50:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:19,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:19,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:19,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356530776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:19,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:19,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 20:50:19,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840960544] [2021-05-21 20:50:19,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:19,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:19,894 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) [2021-05-21 20:50:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:20,109 INFO L93 Difference]: Finished difference Result 457 states and 1299 transitions. [2021-05-21 20:50:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:20,109 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 [2021-05-21 20:50:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:20,110 INFO L225 Difference]: With dead ends: 457 [2021-05-21 20:50:20,110 INFO L226 Difference]: Without dead ends: 438 [2021-05-21 20:50:20,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-21 20:50:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 260. [2021-05-21 20:50:20,113 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) [2021-05-21 20:50:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-05-21 20:50:20,113 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 18 [2021-05-21 20:50:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:20,113 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-05-21 20:50:20,113 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) [2021-05-21 20:50:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-05-21 20:50:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:20,114 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:20,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:20,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:20,317 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1628959453, now seen corresponding path program 50 times [2021-05-21 20:50:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:20,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683195973] [2021-05-21 20:50:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:20,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:20,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683195973] [2021-05-21 20:50:20,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683195973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:20,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854774428] [2021-05-21 20:50:20,367 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 [2021-05-21 20:50:20,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:20,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:20,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:20,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854774428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:20,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:20,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:20,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419250024] [2021-05-21 20:50:20,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:20,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:20,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:20,469 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) [2021-05-21 20:50:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:20,705 INFO L93 Difference]: Finished difference Result 461 states and 1299 transitions. [2021-05-21 20:50:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:20,706 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 [2021-05-21 20:50:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:20,706 INFO L225 Difference]: With dead ends: 461 [2021-05-21 20:50:20,706 INFO L226 Difference]: Without dead ends: 438 [2021-05-21 20:50:20,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-21 20:50:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 258. [2021-05-21 20:50:20,709 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) [2021-05-21 20:50:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-05-21 20:50:20,710 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 18 [2021-05-21 20:50:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:20,710 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-05-21 20:50:20,710 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) [2021-05-21 20:50:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-05-21 20:50:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:20,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:20,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:20,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:20,911 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash 616266921, now seen corresponding path program 51 times [2021-05-21 20:50:20,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:20,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401242612] [2021-05-21 20:50:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:20,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:20,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401242612] [2021-05-21 20:50:20,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401242612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:20,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691291885] [2021-05-21 20:50:20,968 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 [2021-05-21 20:50:20,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:20,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:21,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691291885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:21,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:21,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:50:21,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166147291] [2021-05-21 20:50:21,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:21,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:21,062 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) [2021-05-21 20:50:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:21,281 INFO L93 Difference]: Finished difference Result 455 states and 1280 transitions. [2021-05-21 20:50:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:21,281 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 [2021-05-21 20:50:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:21,282 INFO L225 Difference]: With dead ends: 455 [2021-05-21 20:50:21,282 INFO L226 Difference]: Without dead ends: 428 [2021-05-21 20:50:21,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-21 20:50:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 258. [2021-05-21 20:50:21,285 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) [2021-05-21 20:50:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 767 transitions. [2021-05-21 20:50:21,285 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 767 transitions. Word has length 18 [2021-05-21 20:50:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:21,285 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 767 transitions. [2021-05-21 20:50:21,285 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) [2021-05-21 20:50:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 767 transitions. [2021-05-21 20:50:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:21,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:21,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:21,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-05-21 20:50:21,486 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1345274345, now seen corresponding path program 9 times [2021-05-21 20:50:21,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:21,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522089347] [2021-05-21 20:50:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:21,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:21,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522089347] [2021-05-21 20:50:21,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522089347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:21,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768524345] [2021-05-21 20:50:21,505 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 [2021-05-21 20:50:21,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:21,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768524345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:21,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:21,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 20:50:21,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138429856] [2021-05-21 20:50:21,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:21,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:21,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:21,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:21,658 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) [2021-05-21 20:50:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:21,704 INFO L93 Difference]: Finished difference Result 393 states and 1148 transitions. [2021-05-21 20:50:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:50:21,704 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 [2021-05-21 20:50:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:21,705 INFO L225 Difference]: With dead ends: 393 [2021-05-21 20:50:21,705 INFO L226 Difference]: Without dead ends: 353 [2021-05-21 20:50:21,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-21 20:50:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 247. [2021-05-21 20:50:21,707 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) [2021-05-21 20:50:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 735 transitions. [2021-05-21 20:50:21,708 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 735 transitions. Word has length 18 [2021-05-21 20:50:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:21,708 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 735 transitions. [2021-05-21 20:50:21,708 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) [2021-05-21 20:50:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 735 transitions. [2021-05-21 20:50:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:21,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:21,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:21,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-05-21 20:50:21,909 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:21,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1782534729, now seen corresponding path program 52 times [2021-05-21 20:50:21,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:21,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153464984] [2021-05-21 20:50:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:21,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:21,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153464984] [2021-05-21 20:50:21,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153464984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:21,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822587344] [2021-05-21 20:50:21,969 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 [2021-05-21 20:50:21,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:21,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:22,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822587344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:22,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:22,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 20:50:22,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520738003] [2021-05-21 20:50:22,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:22,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:22,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:22,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:22,068 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) [2021-05-21 20:50:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:22,236 INFO L93 Difference]: Finished difference Result 487 states and 1353 transitions. [2021-05-21 20:50:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:22,236 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 [2021-05-21 20:50:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:22,237 INFO L225 Difference]: With dead ends: 487 [2021-05-21 20:50:22,237 INFO L226 Difference]: Without dead ends: 468 [2021-05-21 20:50:22,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-21 20:50:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 253. [2021-05-21 20:50:22,240 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) [2021-05-21 20:50:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-05-21 20:50:22,240 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 18 [2021-05-21 20:50:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:22,240 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-05-21 20:50:22,240 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) [2021-05-21 20:50:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-05-21 20:50:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:22,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:22,241 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:22,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-05-21 20:50:22,441 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:22,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1582271391, now seen corresponding path program 53 times [2021-05-21 20:50:22,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:22,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086470571] [2021-05-21 20:50:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:22,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086470571] [2021-05-21 20:50:22,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086470571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721134100] [2021-05-21 20:50:22,492 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 [2021-05-21 20:50:22,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:22,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:22,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:22,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:22,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721134100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:22,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:22,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:22,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853438478] [2021-05-21 20:50:22,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:22,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:22,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:22,597 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) [2021-05-21 20:50:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:22,774 INFO L93 Difference]: Finished difference Result 491 states and 1353 transitions. [2021-05-21 20:50:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:22,775 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 [2021-05-21 20:50:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:22,775 INFO L225 Difference]: With dead ends: 491 [2021-05-21 20:50:22,775 INFO L226 Difference]: Without dead ends: 468 [2021-05-21 20:50:22,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-21 20:50:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-05-21 20:50:22,780 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) [2021-05-21 20:50:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 764 transitions. [2021-05-21 20:50:22,781 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 764 transitions. Word has length 18 [2021-05-21 20:50:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:22,781 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 764 transitions. [2021-05-21 20:50:22,781 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) [2021-05-21 20:50:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 764 transitions. [2021-05-21 20:50:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:22,781 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:22,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:22,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:22,997 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash -951095685, now seen corresponding path program 10 times [2021-05-21 20:50:22,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:22,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766123424] [2021-05-21 20:50:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:23,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:23,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766123424] [2021-05-21 20:50:23,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766123424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:23,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487494000] [2021-05-21 20:50:23,019 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 [2021-05-21 20:50:23,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:23,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487494000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:23,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:23,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 20:50:23,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835993255] [2021-05-21 20:50:23,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:23,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:23,092 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) [2021-05-21 20:50:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:23,142 INFO L93 Difference]: Finished difference Result 360 states and 1024 transitions. [2021-05-21 20:50:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:50:23,142 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 [2021-05-21 20:50:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:23,143 INFO L225 Difference]: With dead ends: 360 [2021-05-21 20:50:23,143 INFO L226 Difference]: Without dead ends: 320 [2021-05-21 20:50:23,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-21 20:50:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 249. [2021-05-21 20:50:23,145 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) [2021-05-21 20:50:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 737 transitions. [2021-05-21 20:50:23,146 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 737 transitions. Word has length 18 [2021-05-21 20:50:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:23,146 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 737 transitions. [2021-05-21 20:50:23,146 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) [2021-05-21 20:50:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 737 transitions. [2021-05-21 20:50:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:23,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:23,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:23,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-21 20:50:23,347 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2053044421, now seen corresponding path program 54 times [2021-05-21 20:50:23,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:23,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688527388] [2021-05-21 20:50:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:23,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:23,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688527388] [2021-05-21 20:50:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688527388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:23,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739194249] [2021-05-21 20:50:23,400 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 [2021-05-21 20:50:23,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:23,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:23,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739194249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:23,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:23,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-21 20:50:23,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581798885] [2021-05-21 20:50:23,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:50:23,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:50:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:23,521 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) [2021-05-21 20:50:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:23,723 INFO L93 Difference]: Finished difference Result 461 states and 1276 transitions. [2021-05-21 20:50:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:23,723 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 [2021-05-21 20:50:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:23,724 INFO L225 Difference]: With dead ends: 461 [2021-05-21 20:50:23,724 INFO L226 Difference]: Without dead ends: 442 [2021-05-21 20:50:23,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:50:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-21 20:50:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 246. [2021-05-21 20:50:23,727 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) [2021-05-21 20:50:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 734 transitions. [2021-05-21 20:50:23,728 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 734 transitions. Word has length 18 [2021-05-21 20:50:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:23,728 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 734 transitions. [2021-05-21 20:50:23,728 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) [2021-05-21 20:50:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 734 transitions. [2021-05-21 20:50:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:23,728 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:23,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:23,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:23,929 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1871915973, now seen corresponding path program 55 times [2021-05-21 20:50:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:23,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006855148] [2021-05-21 20:50:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:23,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:23,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006855148] [2021-05-21 20:50:23,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006855148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:23,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575684574] [2021-05-21 20:50:23,980 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 [2021-05-21 20:50:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:24,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:24,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575684574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:24,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:24,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:24,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370597489] [2021-05-21 20:50:24,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:24,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:24,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:24,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:24,082 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) [2021-05-21 20:50:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:24,216 INFO L93 Difference]: Finished difference Result 433 states and 1225 transitions. [2021-05-21 20:50:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:24,216 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 [2021-05-21 20:50:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:24,217 INFO L225 Difference]: With dead ends: 433 [2021-05-21 20:50:24,217 INFO L226 Difference]: Without dead ends: 414 [2021-05-21 20:50:24,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-21 20:50:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 242. [2021-05-21 20:50:24,220 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) [2021-05-21 20:50:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 714 transitions. [2021-05-21 20:50:24,221 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 714 transitions. Word has length 18 [2021-05-21 20:50:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:24,221 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 714 transitions. [2021-05-21 20:50:24,221 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) [2021-05-21 20:50:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 714 transitions. [2021-05-21 20:50:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:24,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:24,221 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:24,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:24,422 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash -116472655, now seen corresponding path program 11 times [2021-05-21 20:50:24,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:24,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140915421] [2021-05-21 20:50:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:24,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:24,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140915421] [2021-05-21 20:50:24,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140915421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:24,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:24,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790351506] [2021-05-21 20:50:24,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:24,461 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) [2021-05-21 20:50:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:24,525 INFO L93 Difference]: Finished difference Result 287 states and 821 transitions. [2021-05-21 20:50:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:50:24,526 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 [2021-05-21 20:50:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:24,526 INFO L225 Difference]: With dead ends: 287 [2021-05-21 20:50:24,526 INFO L226 Difference]: Without dead ends: 234 [2021-05-21 20:50:24,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-21 20:50:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 210. [2021-05-21 20:50:24,528 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) [2021-05-21 20:50:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 613 transitions. [2021-05-21 20:50:24,528 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 613 transitions. Word has length 18 [2021-05-21 20:50:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:24,528 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 613 transitions. [2021-05-21 20:50:24,528 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) [2021-05-21 20:50:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 613 transitions. [2021-05-21 20:50:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:24,529 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:24,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:24,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-05-21 20:50:24,529 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:24,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:24,529 INFO L82 PathProgramCache]: Analyzing trace with hash -9376803, now seen corresponding path program 56 times [2021-05-21 20:50:24,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:24,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043819537] [2021-05-21 20:50:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:24,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:24,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043819537] [2021-05-21 20:50:24,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043819537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:24,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788103273] [2021-05-21 20:50:24,577 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 [2021-05-21 20:50:24,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:24,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788103273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:24,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:24,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 20:50:24,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002749458] [2021-05-21 20:50:24,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:24,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:24,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:24,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:24,692 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) [2021-05-21 20:50:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:24,939 INFO L93 Difference]: Finished difference Result 427 states and 1174 transitions. [2021-05-21 20:50:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:24,939 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 [2021-05-21 20:50:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:24,940 INFO L225 Difference]: With dead ends: 427 [2021-05-21 20:50:24,940 INFO L226 Difference]: Without dead ends: 404 [2021-05-21 20:50:24,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-21 20:50:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 218. [2021-05-21 20:50:24,943 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) [2021-05-21 20:50:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 635 transitions. [2021-05-21 20:50:24,943 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 635 transitions. Word has length 18 [2021-05-21 20:50:24,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:24,943 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 635 transitions. [2021-05-21 20:50:24,943 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) [2021-05-21 20:50:24,943 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 635 transitions. [2021-05-21 20:50:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:24,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:24,944 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:25,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-05-21 20:50:25,144 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:25,144 INFO L82 PathProgramCache]: Analyzing trace with hash 969180641, now seen corresponding path program 57 times [2021-05-21 20:50:25,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:25,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115364349] [2021-05-21 20:50:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:25,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:25,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115364349] [2021-05-21 20:50:25,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115364349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:25,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115871156] [2021-05-21 20:50:25,194 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 [2021-05-21 20:50:25,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:25,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115871156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:25,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:25,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:25,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989507176] [2021-05-21 20:50:25,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:25,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:25,290 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) [2021-05-21 20:50:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:25,476 INFO L93 Difference]: Finished difference Result 411 states and 1144 transitions. [2021-05-21 20:50:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:25,476 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 [2021-05-21 20:50:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:25,477 INFO L225 Difference]: With dead ends: 411 [2021-05-21 20:50:25,477 INFO L226 Difference]: Without dead ends: 392 [2021-05-21 20:50:25,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-21 20:50:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 209. [2021-05-21 20:50:25,480 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) [2021-05-21 20:50:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-05-21 20:50:25,480 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-05-21 20:50:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:25,480 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-05-21 20:50:25,480 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) [2021-05-21 20:50:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-05-21 20:50:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:25,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:25,480 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:25,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:25,681 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358893, now seen corresponding path program 58 times [2021-05-21 20:50:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895373005] [2021-05-21 20:50:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:25,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895373005] [2021-05-21 20:50:25,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895373005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579728250] [2021-05-21 20:50:25,742 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 [2021-05-21 20:50:25,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:25,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579728250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:25,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:25,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:50:25,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164662979] [2021-05-21 20:50:25,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:25,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:25,852 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) [2021-05-21 20:50:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:26,136 INFO L93 Difference]: Finished difference Result 371 states and 1026 transitions. [2021-05-21 20:50:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:26,137 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 [2021-05-21 20:50:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:26,137 INFO L225 Difference]: With dead ends: 371 [2021-05-21 20:50:26,138 INFO L226 Difference]: Without dead ends: 344 [2021-05-21 20:50:26,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-21 20:50:26,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 211. [2021-05-21 20:50:26,141 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) [2021-05-21 20:50:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 613 transitions. [2021-05-21 20:50:26,142 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 613 transitions. Word has length 18 [2021-05-21 20:50:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:26,142 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 613 transitions. [2021-05-21 20:50:26,142 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) [2021-05-21 20:50:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 613 transitions. [2021-05-21 20:50:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:26,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:26,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:26,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:26,343 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1750676137, now seen corresponding path program 59 times [2021-05-21 20:50:26,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:26,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830894478] [2021-05-21 20:50:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:26,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830894478] [2021-05-21 20:50:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830894478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562115501] [2021-05-21 20:50:26,397 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 [2021-05-21 20:50:26,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:26,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562115501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:26,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:26,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:26,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997232063] [2021-05-21 20:50:26,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:26,496 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) [2021-05-21 20:50:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:26,743 INFO L93 Difference]: Finished difference Result 363 states and 1008 transitions. [2021-05-21 20:50:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:26,743 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 [2021-05-21 20:50:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:26,744 INFO L225 Difference]: With dead ends: 363 [2021-05-21 20:50:26,744 INFO L226 Difference]: Without dead ends: 340 [2021-05-21 20:50:26,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-21 20:50:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 219. [2021-05-21 20:50:26,746 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) [2021-05-21 20:50:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 635 transitions. [2021-05-21 20:50:26,747 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 635 transitions. Word has length 18 [2021-05-21 20:50:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:26,747 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 635 transitions. [2021-05-21 20:50:26,747 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) [2021-05-21 20:50:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 635 transitions. [2021-05-21 20:50:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:26,747 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:26,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:26,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-05-21 20:50:26,948 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1565733715, now seen corresponding path program 60 times [2021-05-21 20:50:26,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:26,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383998415] [2021-05-21 20:50:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:26,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:26,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383998415] [2021-05-21 20:50:26,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383998415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:26,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861558182] [2021-05-21 20:50:26,998 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 [2021-05-21 20:50:27,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:27,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:27,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861558182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:27,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:27,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:27,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806027618] [2021-05-21 20:50:27,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:27,094 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) [2021-05-21 20:50:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:27,305 INFO L93 Difference]: Finished difference Result 338 states and 956 transitions. [2021-05-21 20:50:27,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:27,305 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 [2021-05-21 20:50:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:27,306 INFO L225 Difference]: With dead ends: 338 [2021-05-21 20:50:27,306 INFO L226 Difference]: Without dead ends: 319 [2021-05-21 20:50:27,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-21 20:50:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 209. [2021-05-21 20:50:27,308 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) [2021-05-21 20:50:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-05-21 20:50:27,308 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-05-21 20:50:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:27,309 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-05-21 20:50:27,309 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) [2021-05-21 20:50:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-05-21 20:50:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:27,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:27,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:27,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:27,509 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:27,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:27,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2071414893, now seen corresponding path program 61 times [2021-05-21 20:50:27,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:27,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331953707] [2021-05-21 20:50:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:27,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:27,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331953707] [2021-05-21 20:50:27,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331953707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:27,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598707071] [2021-05-21 20:50:27,564 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 [2021-05-21 20:50:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:27,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:27,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:27,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598707071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:27,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:27,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:27,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938053489] [2021-05-21 20:50:27,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:27,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:27,674 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) [2021-05-21 20:50:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:27,911 INFO L93 Difference]: Finished difference Result 369 states and 1028 transitions. [2021-05-21 20:50:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:27,912 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 [2021-05-21 20:50:27,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:27,912 INFO L225 Difference]: With dead ends: 369 [2021-05-21 20:50:27,912 INFO L226 Difference]: Without dead ends: 350 [2021-05-21 20:50:27,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-21 20:50:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 214. [2021-05-21 20:50:27,915 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) [2021-05-21 20:50:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 622 transitions. [2021-05-21 20:50:27,915 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 622 transitions. Word has length 18 [2021-05-21 20:50:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:27,915 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 622 transitions. [2021-05-21 20:50:27,915 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) [2021-05-21 20:50:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 622 transitions. [2021-05-21 20:50:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:27,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:27,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:28,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-05-21 20:50:28,116 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2067720571, now seen corresponding path program 62 times [2021-05-21 20:50:28,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:28,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072875202] [2021-05-21 20:50:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:28,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072875202] [2021-05-21 20:50:28,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072875202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864961350] [2021-05-21 20:50:28,176 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 [2021-05-21 20:50:28,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:28,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:28,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:28,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:28,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864961350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:28,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:28,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:28,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210612503] [2021-05-21 20:50:28,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:28,288 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) [2021-05-21 20:50:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:28,522 INFO L93 Difference]: Finished difference Result 412 states and 1121 transitions. [2021-05-21 20:50:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:28,522 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 [2021-05-21 20:50:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:28,522 INFO L225 Difference]: With dead ends: 412 [2021-05-21 20:50:28,522 INFO L226 Difference]: Without dead ends: 393 [2021-05-21 20:50:28,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-21 20:50:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-05-21 20:50:28,525 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) [2021-05-21 20:50:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 629 transitions. [2021-05-21 20:50:28,525 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 629 transitions. Word has length 18 [2021-05-21 20:50:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:28,526 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 629 transitions. [2021-05-21 20:50:28,526 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) [2021-05-21 20:50:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 629 transitions. [2021-05-21 20:50:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:28,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:28,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:28,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-05-21 20:50:28,730 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1297085549, now seen corresponding path program 63 times [2021-05-21 20:50:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:28,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129658694] [2021-05-21 20:50:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:28,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:28,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129658694] [2021-05-21 20:50:28,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129658694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:28,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439795295] [2021-05-21 20:50:28,789 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 [2021-05-21 20:50:28,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:28,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:28,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:28,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439795295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:28,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:28,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122068968] [2021-05-21 20:50:28,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:28,904 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) [2021-05-21 20:50:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:29,138 INFO L93 Difference]: Finished difference Result 375 states and 1035 transitions. [2021-05-21 20:50:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:29,138 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 [2021-05-21 20:50:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:29,139 INFO L225 Difference]: With dead ends: 375 [2021-05-21 20:50:29,139 INFO L226 Difference]: Without dead ends: 352 [2021-05-21 20:50:29,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-21 20:50:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-05-21 20:50:29,141 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) [2021-05-21 20:50:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-21 20:50:29,142 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-21 20:50:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:29,142 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-21 20:50:29,142 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) [2021-05-21 20:50:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-21 20:50:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:29,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:29,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:29,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:29,343 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:29,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1181922291, now seen corresponding path program 64 times [2021-05-21 20:50:29,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:29,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929790862] [2021-05-21 20:50:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:29,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:29,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929790862] [2021-05-21 20:50:29,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929790862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:29,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754468240] [2021-05-21 20:50:29,423 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 [2021-05-21 20:50:29,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:29,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:29,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:29,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754468240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:29,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:29,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:29,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971768807] [2021-05-21 20:50:29,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:29,536 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) [2021-05-21 20:50:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:29,789 INFO L93 Difference]: Finished difference Result 392 states and 1071 transitions. [2021-05-21 20:50:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:29,790 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 [2021-05-21 20:50:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:29,790 INFO L225 Difference]: With dead ends: 392 [2021-05-21 20:50:29,790 INFO L226 Difference]: Without dead ends: 373 [2021-05-21 20:50:29,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-21 20:50:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-05-21 20:50:29,793 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) [2021-05-21 20:50:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 631 transitions. [2021-05-21 20:50:29,793 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 631 transitions. Word has length 18 [2021-05-21 20:50:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:29,793 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 631 transitions. [2021-05-21 20:50:29,793 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) [2021-05-21 20:50:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 631 transitions. [2021-05-21 20:50:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:29,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:29,794 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:29,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:29,994 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2112083467, now seen corresponding path program 65 times [2021-05-21 20:50:29,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:29,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036613488] [2021-05-21 20:50:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:30,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:30,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036613488] [2021-05-21 20:50:30,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036613488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:30,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897947196] [2021-05-21 20:50:30,065 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 [2021-05-21 20:50:30,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:30,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:30,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897947196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:30,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:30,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:30,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630335221] [2021-05-21 20:50:30,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:30,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:30,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:30,186 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) [2021-05-21 20:50:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:30,439 INFO L93 Difference]: Finished difference Result 396 states and 1071 transitions. [2021-05-21 20:50:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:30,440 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 [2021-05-21 20:50:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:30,440 INFO L225 Difference]: With dead ends: 396 [2021-05-21 20:50:30,440 INFO L226 Difference]: Without dead ends: 373 [2021-05-21 20:50:30,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-21 20:50:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 214. [2021-05-21 20:50:30,443 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) [2021-05-21 20:50:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 624 transitions. [2021-05-21 20:50:30,443 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 624 transitions. Word has length 18 [2021-05-21 20:50:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:30,443 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 624 transitions. [2021-05-21 20:50:30,443 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) [2021-05-21 20:50:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 624 transitions. [2021-05-21 20:50:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:30,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:30,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:30,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-05-21 20:50:30,644 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1099390935, now seen corresponding path program 66 times [2021-05-21 20:50:30,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:30,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192434244] [2021-05-21 20:50:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:30,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192434244] [2021-05-21 20:50:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192434244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745971055] [2021-05-21 20:50:30,692 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 [2021-05-21 20:50:30,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:30,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:30,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745971055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:30,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:30,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:30,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248092940] [2021-05-21 20:50:30,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:30,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:30,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:30,796 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) [2021-05-21 20:50:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:31,023 INFO L93 Difference]: Finished difference Result 361 states and 998 transitions. [2021-05-21 20:50:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:31,023 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 [2021-05-21 20:50:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:31,024 INFO L225 Difference]: With dead ends: 361 [2021-05-21 20:50:31,024 INFO L226 Difference]: Without dead ends: 334 [2021-05-21 20:50:31,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-21 20:50:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 212. [2021-05-21 20:50:31,026 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) [2021-05-21 20:50:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-21 20:50:31,027 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-21 20:50:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:31,027 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-21 20:50:31,027 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) [2021-05-21 20:50:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-21 20:50:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:31,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:31,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:31,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:31,228 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1459644047, now seen corresponding path program 67 times [2021-05-21 20:50:31,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:31,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284375738] [2021-05-21 20:50:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:31,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:31,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284375738] [2021-05-21 20:50:31,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284375738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:31,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839289339] [2021-05-21 20:50:31,283 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 [2021-05-21 20:50:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:31,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839289339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:31,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:31,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:31,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285546978] [2021-05-21 20:50:31,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:31,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:31,386 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) [2021-05-21 20:50:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:31,605 INFO L93 Difference]: Finished difference Result 491 states and 1355 transitions. [2021-05-21 20:50:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:31,605 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 [2021-05-21 20:50:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:31,606 INFO L225 Difference]: With dead ends: 491 [2021-05-21 20:50:31,606 INFO L226 Difference]: Without dead ends: 472 [2021-05-21 20:50:31,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-21 20:50:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 218. [2021-05-21 20:50:31,608 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) [2021-05-21 20:50:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 638 transitions. [2021-05-21 20:50:31,609 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 638 transitions. Word has length 18 [2021-05-21 20:50:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:31,609 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 638 transitions. [2021-05-21 20:50:31,609 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) [2021-05-21 20:50:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 638 transitions. [2021-05-21 20:50:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:31,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:31,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:31,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:31,810 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:31,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1303812215, now seen corresponding path program 68 times [2021-05-21 20:50:31,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:31,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852794534] [2021-05-21 20:50:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:31,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:31,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852794534] [2021-05-21 20:50:31,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852794534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:31,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788709653] [2021-05-21 20:50:31,864 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 [2021-05-21 20:50:31,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:31,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:31,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:31,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788709653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:31,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:31,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668738411] [2021-05-21 20:50:31,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:31,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:31,968 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) [2021-05-21 20:50:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:32,175 INFO L93 Difference]: Finished difference Result 526 states and 1428 transitions. [2021-05-21 20:50:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:32,175 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 [2021-05-21 20:50:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:32,176 INFO L225 Difference]: With dead ends: 526 [2021-05-21 20:50:32,176 INFO L226 Difference]: Without dead ends: 507 [2021-05-21 20:50:32,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-21 20:50:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 222. [2021-05-21 20:50:32,180 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) [2021-05-21 20:50:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 654 transitions. [2021-05-21 20:50:32,181 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 654 transitions. Word has length 18 [2021-05-21 20:50:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:32,181 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 654 transitions. [2021-05-21 20:50:32,181 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) [2021-05-21 20:50:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 654 transitions. [2021-05-21 20:50:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:32,181 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:32,181 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:32,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:32,403 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2060993905, now seen corresponding path program 69 times [2021-05-21 20:50:32,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:32,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122104125] [2021-05-21 20:50:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:32,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:32,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122104125] [2021-05-21 20:50:32,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122104125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:32,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792176126] [2021-05-21 20:50:32,449 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 [2021-05-21 20:50:32,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:32,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:32,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792176126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:32,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:32,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:32,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778355110] [2021-05-21 20:50:32,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:32,563 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) [2021-05-21 20:50:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:32,781 INFO L93 Difference]: Finished difference Result 489 states and 1342 transitions. [2021-05-21 20:50:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:32,781 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 [2021-05-21 20:50:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:32,782 INFO L225 Difference]: With dead ends: 489 [2021-05-21 20:50:32,782 INFO L226 Difference]: Without dead ends: 466 [2021-05-21 20:50:32,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-21 20:50:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 222. [2021-05-21 20:50:32,785 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) [2021-05-21 20:50:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 650 transitions. [2021-05-21 20:50:32,785 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 650 transitions. Word has length 18 [2021-05-21 20:50:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:32,785 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 650 transitions. [2021-05-21 20:50:32,785 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) [2021-05-21 20:50:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 650 transitions. [2021-05-21 20:50:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:32,785 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:32,786 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:32,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:32,987 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1255509907, now seen corresponding path program 70 times [2021-05-21 20:50:32,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:32,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143311007] [2021-05-21 20:50:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:33,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143311007] [2021-05-21 20:50:33,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143311007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839973214] [2021-05-21 20:50:33,048 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 [2021-05-21 20:50:33,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:33,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:33,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839973214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:33,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:33,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:33,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340324885] [2021-05-21 20:50:33,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:33,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:33,155 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) [2021-05-21 20:50:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:33,329 INFO L93 Difference]: Finished difference Result 452 states and 1260 transitions. [2021-05-21 20:50:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:33,330 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 [2021-05-21 20:50:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:33,330 INFO L225 Difference]: With dead ends: 452 [2021-05-21 20:50:33,331 INFO L226 Difference]: Without dead ends: 433 [2021-05-21 20:50:33,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:50:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-21 20:50:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 217. [2021-05-21 20:50:33,333 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) [2021-05-21 20:50:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 637 transitions. [2021-05-21 20:50:33,334 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 637 transitions. Word has length 18 [2021-05-21 20:50:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:33,334 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 637 transitions. [2021-05-21 20:50:33,334 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) [2021-05-21 20:50:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 637 transitions. [2021-05-21 20:50:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:33,334 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:33,334 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:33,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:33,535 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1030444307, now seen corresponding path program 71 times [2021-05-21 20:50:33,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:33,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366292986] [2021-05-21 20:50:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:33,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:33,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366292986] [2021-05-21 20:50:33,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366292986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:33,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948098088] [2021-05-21 20:50:33,582 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 [2021-05-21 20:50:33,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:33,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948098088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:33,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:33,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:33,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484852932] [2021-05-21 20:50:33,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:33,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:33,682 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) [2021-05-21 20:50:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:33,828 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-05-21 20:50:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:33,828 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 [2021-05-21 20:50:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:33,829 INFO L225 Difference]: With dead ends: 433 [2021-05-21 20:50:33,829 INFO L226 Difference]: Without dead ends: 414 [2021-05-21 20:50:33,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-21 20:50:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 221. [2021-05-21 20:50:33,832 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) [2021-05-21 20:50:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 657 transitions. [2021-05-21 20:50:33,832 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 657 transitions. Word has length 18 [2021-05-21 20:50:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:33,832 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 657 transitions. [2021-05-21 20:50:33,832 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) [2021-05-21 20:50:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 657 transitions. [2021-05-21 20:50:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:33,833 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:33,833 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:34,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-05-21 20:50:34,033 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash -668276081, now seen corresponding path program 72 times [2021-05-21 20:50:34,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:34,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769166561] [2021-05-21 20:50:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:34,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769166561] [2021-05-21 20:50:34,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769166561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4551065] [2021-05-21 20:50:34,072 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 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 [2021-05-21 20:50:34,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:34,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:34,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4551065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:34,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:34,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:50:34,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654756527] [2021-05-21 20:50:34,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:34,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:34,150 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) [2021-05-21 20:50:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:34,278 INFO L93 Difference]: Finished difference Result 404 states and 1161 transitions. [2021-05-21 20:50:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:34,278 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 [2021-05-21 20:50:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:34,278 INFO L225 Difference]: With dead ends: 404 [2021-05-21 20:50:34,278 INFO L226 Difference]: Without dead ends: 385 [2021-05-21 20:50:34,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-21 20:50:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 213. [2021-05-21 20:50:34,281 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) [2021-05-21 20:50:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 621 transitions. [2021-05-21 20:50:34,281 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 621 transitions. Word has length 18 [2021-05-21 20:50:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:34,281 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 621 transitions. [2021-05-21 20:50:34,281 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) [2021-05-21 20:50:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 621 transitions. [2021-05-21 20:50:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:34,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:34,282 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:34,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:34,482 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash -188192517, now seen corresponding path program 73 times [2021-05-21 20:50:34,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:34,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129097013] [2021-05-21 20:50:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:34,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:34,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129097013] [2021-05-21 20:50:34,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129097013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:34,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451237888] [2021-05-21 20:50:34,539 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 [2021-05-21 20:50:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:34,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451237888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:34,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:34,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-21 20:50:34,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078396686] [2021-05-21 20:50:34,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:34,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:34,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:34,646 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) [2021-05-21 20:50:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:34,842 INFO L93 Difference]: Finished difference Result 502 states and 1407 transitions. [2021-05-21 20:50:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:34,842 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 [2021-05-21 20:50:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:34,843 INFO L225 Difference]: With dead ends: 502 [2021-05-21 20:50:34,843 INFO L226 Difference]: Without dead ends: 483 [2021-05-21 20:50:34,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-05-21 20:50:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 219. [2021-05-21 20:50:34,846 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) [2021-05-21 20:50:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-05-21 20:50:34,846 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 18 [2021-05-21 20:50:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:34,846 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-05-21 20:50:34,846 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) [2021-05-21 20:50:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-05-21 20:50:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:34,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:34,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:35,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-05-21 20:50:35,047 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:35,047 INFO L82 PathProgramCache]: Analyzing trace with hash 741968659, now seen corresponding path program 74 times [2021-05-21 20:50:35,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:35,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030964388] [2021-05-21 20:50:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:35,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:35,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030964388] [2021-05-21 20:50:35,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030964388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:35,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487546616] [2021-05-21 20:50:35,091 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 [2021-05-21 20:50:35,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:35,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:35,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487546616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:35,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:35,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:50:35,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092869273] [2021-05-21 20:50:35,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:35,202 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) [2021-05-21 20:50:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:35,377 INFO L93 Difference]: Finished difference Result 490 states and 1367 transitions. [2021-05-21 20:50:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:35,377 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 [2021-05-21 20:50:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:35,378 INFO L225 Difference]: With dead ends: 490 [2021-05-21 20:50:35,378 INFO L226 Difference]: Without dead ends: 467 [2021-05-21 20:50:35,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-21 20:50:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 221. [2021-05-21 20:50:35,380 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) [2021-05-21 20:50:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 649 transitions. [2021-05-21 20:50:35,381 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 649 transitions. Word has length 18 [2021-05-21 20:50:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:35,381 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 649 transitions. [2021-05-21 20:50:35,381 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) [2021-05-21 20:50:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 649 transitions. [2021-05-21 20:50:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:35,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:35,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:35,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:35,582 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:35,582 INFO L82 PathProgramCache]: Analyzing trace with hash 82317175, now seen corresponding path program 75 times [2021-05-21 20:50:35,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:35,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147972694] [2021-05-21 20:50:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:35,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:35,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147972694] [2021-05-21 20:50:35,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147972694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:35,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617914070] [2021-05-21 20:50:35,637 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 [2021-05-21 20:50:35,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:35,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:35,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617914070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:35,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:35,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-21 20:50:35,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413947092] [2021-05-21 20:50:35,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:50:35,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:50:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:35,752 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) [2021-05-21 20:50:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:35,985 INFO L93 Difference]: Finished difference Result 505 states and 1410 transitions. [2021-05-21 20:50:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:35,985 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 [2021-05-21 20:50:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:35,986 INFO L225 Difference]: With dead ends: 505 [2021-05-21 20:50:35,986 INFO L226 Difference]: Without dead ends: 486 [2021-05-21 20:50:35,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:50:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-21 20:50:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 218. [2021-05-21 20:50:35,989 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) [2021-05-21 20:50:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 646 transitions. [2021-05-21 20:50:35,989 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 646 transitions. Word has length 18 [2021-05-21 20:50:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:35,989 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 646 transitions. [2021-05-21 20:50:35,989 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) [2021-05-21 20:50:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 646 transitions. [2021-05-21 20:50:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:35,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:35,990 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:36,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-05-21 20:50:36,190 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash -98811273, now seen corresponding path program 76 times [2021-05-21 20:50:36,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:36,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726006098] [2021-05-21 20:50:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:36,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:36,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726006098] [2021-05-21 20:50:36,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726006098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:36,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774249287] [2021-05-21 20:50:36,236 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) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:36,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:36,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774249287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:36,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:36,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:36,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554861116] [2021-05-21 20:50:36,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:36,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:36,336 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) [2021-05-21 20:50:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:36,459 INFO L93 Difference]: Finished difference Result 486 states and 1381 transitions. [2021-05-21 20:50:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:36,460 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 [2021-05-21 20:50:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:36,460 INFO L225 Difference]: With dead ends: 486 [2021-05-21 20:50:36,460 INFO L226 Difference]: Without dead ends: 467 [2021-05-21 20:50:36,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-21 20:50:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 214. [2021-05-21 20:50:36,463 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) [2021-05-21 20:50:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 626 transitions. [2021-05-21 20:50:36,463 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 626 transitions. Word has length 18 [2021-05-21 20:50:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:36,463 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 626 transitions. [2021-05-21 20:50:36,463 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) [2021-05-21 20:50:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 626 transitions. [2021-05-21 20:50:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:36,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:36,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:36,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-05-21 20:50:36,664 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:36,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1980104049, now seen corresponding path program 77 times [2021-05-21 20:50:36,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:36,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739441437] [2021-05-21 20:50:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:36,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:36,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739441437] [2021-05-21 20:50:36,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739441437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:36,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141033341] [2021-05-21 20:50:36,718 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 [2021-05-21 20:50:36,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:36,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:36,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141033341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:36,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:36,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:36,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761998457] [2021-05-21 20:50:36,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:36,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:36,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:36,832 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) [2021-05-21 20:50:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:37,039 INFO L93 Difference]: Finished difference Result 443 states and 1246 transitions. [2021-05-21 20:50:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:37,040 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 [2021-05-21 20:50:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:37,040 INFO L225 Difference]: With dead ends: 443 [2021-05-21 20:50:37,040 INFO L226 Difference]: Without dead ends: 420 [2021-05-21 20:50:37,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-21 20:50:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 222. [2021-05-21 20:50:37,043 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) [2021-05-21 20:50:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 648 transitions. [2021-05-21 20:50:37,043 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 648 transitions. Word has length 18 [2021-05-21 20:50:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:37,044 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 648 transitions. [2021-05-21 20:50:37,044 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) [2021-05-21 20:50:37,045 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 648 transitions. [2021-05-21 20:50:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:37,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:37,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:37,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-05-21 20:50:37,269 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:37,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1001546605, now seen corresponding path program 78 times [2021-05-21 20:50:37,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:37,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301138000] [2021-05-21 20:50:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:37,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:37,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301138000] [2021-05-21 20:50:37,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301138000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:37,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301939344] [2021-05-21 20:50:37,313 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 [2021-05-21 20:50:37,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:37,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:37,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301939344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:37,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:37,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:37,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670486135] [2021-05-21 20:50:37,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:37,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:37,407 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) [2021-05-21 20:50:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:37,581 INFO L93 Difference]: Finished difference Result 427 states and 1216 transitions. [2021-05-21 20:50:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:37,582 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 [2021-05-21 20:50:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:37,583 INFO L225 Difference]: With dead ends: 427 [2021-05-21 20:50:37,583 INFO L226 Difference]: Without dead ends: 408 [2021-05-21 20:50:37,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-21 20:50:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 212. [2021-05-21 20:50:37,585 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) [2021-05-21 20:50:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-21 20:50:37,585 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-21 20:50:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:37,586 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-21 20:50:37,586 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) [2021-05-21 20:50:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-21 20:50:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:37,586 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:37,586 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:37,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-05-21 20:50:37,787 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:37,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2120551441, now seen corresponding path program 79 times [2021-05-21 20:50:37,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:37,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558429522] [2021-05-21 20:50:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:37,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:37,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558429522] [2021-05-21 20:50:37,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558429522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:37,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111257877] [2021-05-21 20:50:37,849 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 [2021-05-21 20:50:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:37,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:37,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111257877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:37,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:37,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 20:50:37,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828915672] [2021-05-21 20:50:37,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:37,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:37,948 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) [2021-05-21 20:50:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:38,188 INFO L93 Difference]: Finished difference Result 424 states and 1183 transitions. [2021-05-21 20:50:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:38,188 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 [2021-05-21 20:50:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:38,189 INFO L225 Difference]: With dead ends: 424 [2021-05-21 20:50:38,189 INFO L226 Difference]: Without dead ends: 405 [2021-05-21 20:50:38,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:50:38,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-21 20:50:38,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 217. [2021-05-21 20:50:38,191 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) [2021-05-21 20:50:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 636 transitions. [2021-05-21 20:50:38,192 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 636 transitions. Word has length 18 [2021-05-21 20:50:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:38,192 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 636 transitions. [2021-05-21 20:50:38,192 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) [2021-05-21 20:50:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 636 transitions. [2021-05-21 20:50:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:38,192 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:38,192 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:38,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-21 20:50:38,393 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1190390265, now seen corresponding path program 80 times [2021-05-21 20:50:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:38,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943197140] [2021-05-21 20:50:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:38,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:38,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943197140] [2021-05-21 20:50:38,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943197140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:38,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547394006] [2021-05-21 20:50:38,452 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 [2021-05-21 20:50:38,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:38,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:38,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547394006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:38,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:38,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:38,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756890542] [2021-05-21 20:50:38,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:38,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:38,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:38,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:38,553 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) [2021-05-21 20:50:38,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:38,792 INFO L93 Difference]: Finished difference Result 428 states and 1183 transitions. [2021-05-21 20:50:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:38,793 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 [2021-05-21 20:50:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:38,793 INFO L225 Difference]: With dead ends: 428 [2021-05-21 20:50:38,793 INFO L226 Difference]: Without dead ends: 405 [2021-05-21 20:50:38,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-21 20:50:38,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 215. [2021-05-21 20:50:38,796 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) [2021-05-21 20:50:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 629 transitions. [2021-05-21 20:50:38,796 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 629 transitions. Word has length 18 [2021-05-21 20:50:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:38,796 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 629 transitions. [2021-05-21 20:50:38,796 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) [2021-05-21 20:50:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 629 transitions. [2021-05-21 20:50:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:38,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:38,797 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:38,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:38,997 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2091884499, now seen corresponding path program 81 times [2021-05-21 20:50:38,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:38,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312244466] [2021-05-21 20:50:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:39,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:39,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312244466] [2021-05-21 20:50:39,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312244466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:39,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782837008] [2021-05-21 20:50:39,045 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 [2021-05-21 20:50:39,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:39,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:39,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:39,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:39,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782837008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:39,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:39,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:50:39,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406135534] [2021-05-21 20:50:39,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:39,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:39,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:39,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:39,134 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) [2021-05-21 20:50:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:39,363 INFO L93 Difference]: Finished difference Result 422 states and 1164 transitions. [2021-05-21 20:50:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:39,364 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 [2021-05-21 20:50:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:39,364 INFO L225 Difference]: With dead ends: 422 [2021-05-21 20:50:39,364 INFO L226 Difference]: Without dead ends: 395 [2021-05-21 20:50:39,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-21 20:50:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 213. [2021-05-21 20:50:39,367 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) [2021-05-21 20:50:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-05-21 20:50:39,367 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-05-21 20:50:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:39,367 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-05-21 20:50:39,367 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) [2021-05-21 20:50:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-05-21 20:50:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:39,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:39,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:39,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-21 20:50:39,568 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:39,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1036814989, now seen corresponding path program 82 times [2021-05-21 20:50:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:39,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080188989] [2021-05-21 20:50:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:39,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:39,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080188989] [2021-05-21 20:50:39,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080188989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:39,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798992237] [2021-05-21 20:50:39,623 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 [2021-05-21 20:50:39,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:39,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:39,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798992237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:39,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:39,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 20:50:39,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705146098] [2021-05-21 20:50:39,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:50:39,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:39,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:50:39,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:39,717 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) [2021-05-21 20:50:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:39,901 INFO L93 Difference]: Finished difference Result 441 states and 1207 transitions. [2021-05-21 20:50:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:39,901 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 [2021-05-21 20:50:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:39,902 INFO L225 Difference]: With dead ends: 441 [2021-05-21 20:50:39,902 INFO L226 Difference]: Without dead ends: 422 [2021-05-21 20:50:39,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-21 20:50:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 219. [2021-05-21 20:50:39,905 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) [2021-05-21 20:50:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 649 transitions. [2021-05-21 20:50:39,905 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 649 transitions. Word has length 18 [2021-05-21 20:50:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:39,905 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 649 transitions. [2021-05-21 20:50:39,905 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) [2021-05-21 20:50:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 649 transitions. [2021-05-21 20:50:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:39,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:39,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:40,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-05-21 20:50:40,106 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -106653813, now seen corresponding path program 83 times [2021-05-21 20:50:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:40,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223310444] [2021-05-21 20:50:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:40,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:40,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223310444] [2021-05-21 20:50:40,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223310444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:40,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014205800] [2021-05-21 20:50:40,156 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 [2021-05-21 20:50:40,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:40,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:40,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014205800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:40,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:40,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:40,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999710833] [2021-05-21 20:50:40,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:40,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:40,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:40,256 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) [2021-05-21 20:50:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:40,443 INFO L93 Difference]: Finished difference Result 445 states and 1207 transitions. [2021-05-21 20:50:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:40,443 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 [2021-05-21 20:50:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:40,444 INFO L225 Difference]: With dead ends: 445 [2021-05-21 20:50:40,444 INFO L226 Difference]: Without dead ends: 422 [2021-05-21 20:50:40,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-21 20:50:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 221. [2021-05-21 20:50:40,446 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) [2021-05-21 20:50:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 650 transitions. [2021-05-21 20:50:40,447 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 650 transitions. Word has length 18 [2021-05-21 20:50:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:40,447 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 650 transitions. [2021-05-21 20:50:40,447 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) [2021-05-21 20:50:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 650 transitions. [2021-05-21 20:50:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:40,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:40,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:40,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:40,648 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash -766305297, now seen corresponding path program 84 times [2021-05-21 20:50:40,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:40,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35419979] [2021-05-21 20:50:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:40,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35419979] [2021-05-21 20:50:40,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35419979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025802122] [2021-05-21 20:50:40,701 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 [2021-05-21 20:50:40,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:40,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:40,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:40,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025802122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:40,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:40,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-21 20:50:40,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053626924] [2021-05-21 20:50:40,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:50:40,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:40,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:50:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:40,814 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) [2021-05-21 20:50:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:41,046 INFO L93 Difference]: Finished difference Result 414 states and 1142 transitions. [2021-05-21 20:50:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:41,046 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 [2021-05-21 20:50:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:41,047 INFO L225 Difference]: With dead ends: 414 [2021-05-21 20:50:41,047 INFO L226 Difference]: Without dead ends: 395 [2021-05-21 20:50:41,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:50:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-21 20:50:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 218. [2021-05-21 20:50:41,049 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) [2021-05-21 20:50:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 647 transitions. [2021-05-21 20:50:41,050 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 647 transitions. Word has length 18 [2021-05-21 20:50:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:41,050 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 647 transitions. [2021-05-21 20:50:41,050 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) [2021-05-21 20:50:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 647 transitions. [2021-05-21 20:50:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:41,050 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:41,050 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:41,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-05-21 20:50:41,251 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -947433745, now seen corresponding path program 85 times [2021-05-21 20:50:41,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:41,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819217635] [2021-05-21 20:50:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:41,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819217635] [2021-05-21 20:50:41,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819217635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877753845] [2021-05-21 20:50:41,293 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 [2021-05-21 20:50:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877753845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:41,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:41,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:41,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497622122] [2021-05-21 20:50:41,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:41,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:41,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:41,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:41,383 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) [2021-05-21 20:50:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:41,527 INFO L93 Difference]: Finished difference Result 386 states and 1091 transitions. [2021-05-21 20:50:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:41,527 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 [2021-05-21 20:50:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:41,528 INFO L225 Difference]: With dead ends: 386 [2021-05-21 20:50:41,528 INFO L226 Difference]: Without dead ends: 367 [2021-05-21 20:50:41,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-21 20:50:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 214. [2021-05-21 20:50:41,530 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) [2021-05-21 20:50:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 627 transitions. [2021-05-21 20:50:41,530 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 627 transitions. Word has length 18 [2021-05-21 20:50:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:41,531 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 627 transitions. [2021-05-21 20:50:41,531 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) [2021-05-21 20:50:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 627 transitions. [2021-05-21 20:50:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:41,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:41,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:41,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:41,731 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:41,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1466240775, now seen corresponding path program 86 times [2021-05-21 20:50:41,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:41,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69006915] [2021-05-21 20:50:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:41,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:41,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69006915] [2021-05-21 20:50:41,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69006915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:41,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338911072] [2021-05-21 20:50:41,779 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 [2021-05-21 20:50:41,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:41,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:41,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:41,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338911072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:41,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:41,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 20:50:41,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078296816] [2021-05-21 20:50:41,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:50:41,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:50:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:41,898 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) [2021-05-21 20:50:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:42,148 INFO L93 Difference]: Finished difference Result 422 states and 1166 transitions. [2021-05-21 20:50:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:42,148 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 [2021-05-21 20:50:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:42,149 INFO L225 Difference]: With dead ends: 422 [2021-05-21 20:50:42,149 INFO L226 Difference]: Without dead ends: 399 [2021-05-21 20:50:42,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:50:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-21 20:50:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 222. [2021-05-21 20:50:42,151 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) [2021-05-21 20:50:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 649 transitions. [2021-05-21 20:50:42,152 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 649 transitions. Word has length 18 [2021-05-21 20:50:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:42,152 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 649 transitions. [2021-05-21 20:50:42,152 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) [2021-05-21 20:50:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 649 transitions. [2021-05-21 20:50:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:42,152 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:42,152 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:42,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:42,353 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1850169077, now seen corresponding path program 87 times [2021-05-21 20:50:42,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:42,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677689274] [2021-05-21 20:50:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:42,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677689274] [2021-05-21 20:50:42,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677689274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428005330] [2021-05-21 20:50:42,398 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 [2021-05-21 20:50:42,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:42,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:42,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428005330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:42,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:42,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:42,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512813237] [2021-05-21 20:50:42,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:42,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:42,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:42,499 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) [2021-05-21 20:50:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:42,714 INFO L93 Difference]: Finished difference Result 406 states and 1136 transitions. [2021-05-21 20:50:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:42,715 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 [2021-05-21 20:50:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:42,715 INFO L225 Difference]: With dead ends: 406 [2021-05-21 20:50:42,715 INFO L226 Difference]: Without dead ends: 387 [2021-05-21 20:50:42,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-21 20:50:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 213. [2021-05-21 20:50:42,718 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) [2021-05-21 20:50:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-05-21 20:50:42,718 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-05-21 20:50:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:42,718 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-05-21 20:50:42,718 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) [2021-05-21 20:50:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-05-21 20:50:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:42,719 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:42,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:42,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-05-21 20:50:42,919 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:42,920 INFO L82 PathProgramCache]: Analyzing trace with hash -687990825, now seen corresponding path program 88 times [2021-05-21 20:50:42,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:42,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807448380] [2021-05-21 20:50:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:42,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807448380] [2021-05-21 20:50:42,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807448380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277140434] [2021-05-21 20:50:42,971 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 [2021-05-21 20:50:43,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:43,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:43,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:43,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277140434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:43,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:43,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 20:50:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445297549] [2021-05-21 20:50:43,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:43,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:43,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:43,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:43,077 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) [2021-05-21 20:50:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:43,320 INFO L93 Difference]: Finished difference Result 366 states and 1018 transitions. [2021-05-21 20:50:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:43,320 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 [2021-05-21 20:50:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:43,321 INFO L225 Difference]: With dead ends: 366 [2021-05-21 20:50:43,321 INFO L226 Difference]: Without dead ends: 339 [2021-05-21 20:50:43,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-21 20:50:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 215. [2021-05-21 20:50:43,324 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) [2021-05-21 20:50:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 627 transitions. [2021-05-21 20:50:43,324 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 627 transitions. Word has length 18 [2021-05-21 20:50:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:43,324 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 627 transitions. [2021-05-21 20:50:43,324 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) [2021-05-21 20:50:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 627 transitions. [2021-05-21 20:50:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:43,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:43,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:43,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-05-21 20:50:43,525 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1068673581, now seen corresponding path program 89 times [2021-05-21 20:50:43,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:43,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504517516] [2021-05-21 20:50:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:43,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:43,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504517516] [2021-05-21 20:50:43,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504517516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:43,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387384602] [2021-05-21 20:50:43,572 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 [2021-05-21 20:50:43,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:43,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:43,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387384602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:43,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:43,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:43,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257738263] [2021-05-21 20:50:43,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:43,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:43,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:43,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:43,679 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) [2021-05-21 20:50:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:43,895 INFO L93 Difference]: Finished difference Result 358 states and 1000 transitions. [2021-05-21 20:50:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:43,895 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 [2021-05-21 20:50:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:43,895 INFO L225 Difference]: With dead ends: 358 [2021-05-21 20:50:43,896 INFO L226 Difference]: Without dead ends: 335 [2021-05-21 20:50:43,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-21 20:50:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 223. [2021-05-21 20:50:43,898 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) [2021-05-21 20:50:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 649 transitions. [2021-05-21 20:50:43,898 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 649 transitions. Word has length 18 [2021-05-21 20:50:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:43,899 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 649 transitions. [2021-05-21 20:50:43,899 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) [2021-05-21 20:50:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 649 transitions. [2021-05-21 20:50:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:50:43,899 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:43,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:44,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:44,099 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -90116137, now seen corresponding path program 90 times [2021-05-21 20:50:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:44,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114780053] [2021-05-21 20:50:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114780053] [2021-05-21 20:50:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114780053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620818468] [2021-05-21 20:50:44,146 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 [2021-05-21 20:50:44,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:44,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:50:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620818468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:44,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:44,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 20:50:44,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357535564] [2021-05-21 20:50:44,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:44,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:44,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:44,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:44,244 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) [2021-05-21 20:50:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:44,446 INFO L93 Difference]: Finished difference Result 333 states and 948 transitions. [2021-05-21 20:50:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:50:44,447 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 [2021-05-21 20:50:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:44,447 INFO L225 Difference]: With dead ends: 333 [2021-05-21 20:50:44,447 INFO L226 Difference]: Without dead ends: 314 [2021-05-21 20:50:44,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:50:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-21 20:50:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-05-21 20:50:44,449 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) [2021-05-21 20:50:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-21 20:50:44,450 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-21 20:50:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:44,450 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-21 20:50:44,450 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) [2021-05-21 20:50:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-21 20:50:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:44,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:44,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:44,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-05-21 20:50:44,651 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1714954922, now seen corresponding path program 1 times [2021-05-21 20:50:44,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:44,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347699930] [2021-05-21 20:50:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:44,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:44,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347699930] [2021-05-21 20:50:44,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347699930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:44,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676296029] [2021-05-21 20:50:44,680 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 [2021-05-21 20:50:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:44,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676296029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:44,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:44,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:44,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049436912] [2021-05-21 20:50:44,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:44,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:44,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:44,751 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) [2021-05-21 20:50:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:44,824 INFO L93 Difference]: Finished difference Result 306 states and 874 transitions. [2021-05-21 20:50:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:44,825 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 [2021-05-21 20:50:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:44,825 INFO L225 Difference]: With dead ends: 306 [2021-05-21 20:50:44,825 INFO L226 Difference]: Without dead ends: 282 [2021-05-21 20:50:44,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-21 20:50:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 219. [2021-05-21 20:50:44,827 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) [2021-05-21 20:50:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 638 transitions. [2021-05-21 20:50:44,828 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 638 transitions. Word has length 19 [2021-05-21 20:50:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:44,828 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 638 transitions. [2021-05-21 20:50:44,828 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) [2021-05-21 20:50:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 638 transitions. [2021-05-21 20:50:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:44,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:44,828 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:45,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:45,029 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1799002545, now seen corresponding path program 1 times [2021-05-21 20:50:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:45,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600000576] [2021-05-21 20:50:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:45,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:45,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600000576] [2021-05-21 20:50:45,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600000576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:45,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183904318] [2021-05-21 20:50:45,056 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 [2021-05-21 20:50:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:45,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183904318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:45,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:45,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:50:45,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087127544] [2021-05-21 20:50:45,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:45,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:45,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:45,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:45,136 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) [2021-05-21 20:50:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:45,221 INFO L93 Difference]: Finished difference Result 359 states and 1037 transitions. [2021-05-21 20:50:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:45,222 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 [2021-05-21 20:50:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:45,222 INFO L225 Difference]: With dead ends: 359 [2021-05-21 20:50:45,222 INFO L226 Difference]: Without dead ends: 359 [2021-05-21 20:50:45,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-21 20:50:45,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 230. [2021-05-21 20:50:45,225 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) [2021-05-21 20:50:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 682 transitions. [2021-05-21 20:50:45,225 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 682 transitions. Word has length 19 [2021-05-21 20:50:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:45,228 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 682 transitions. [2021-05-21 20:50:45,228 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) [2021-05-21 20:50:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 682 transitions. [2021-05-21 20:50:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:45,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:45,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:45,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-05-21 20:50:45,452 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2143819529, now seen corresponding path program 2 times [2021-05-21 20:50:45,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:45,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395958231] [2021-05-21 20:50:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:45,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:45,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395958231] [2021-05-21 20:50:45,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395958231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:45,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274717221] [2021-05-21 20:50:45,478 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 [2021-05-21 20:50:45,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:45,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:45,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274717221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:45,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:45,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:45,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118680772] [2021-05-21 20:50:45,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:45,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:45,551 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) [2021-05-21 20:50:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:45,637 INFO L93 Difference]: Finished difference Result 371 states and 1061 transitions. [2021-05-21 20:50:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:45,638 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 [2021-05-21 20:50:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:45,638 INFO L225 Difference]: With dead ends: 371 [2021-05-21 20:50:45,638 INFO L226 Difference]: Without dead ends: 363 [2021-05-21 20:50:45,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-21 20:50:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 246. [2021-05-21 20:50:45,641 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) [2021-05-21 20:50:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-21 20:50:45,641 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-21 20:50:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:45,641 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-21 20:50:45,641 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) [2021-05-21 20:50:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-21 20:50:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:45,642 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:45,642 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:45,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-05-21 20:50:45,842 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:45,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2111872576, now seen corresponding path program 2 times [2021-05-21 20:50:45,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:45,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850647749] [2021-05-21 20:50:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:45,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:45,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850647749] [2021-05-21 20:50:45,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850647749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:45,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957134586] [2021-05-21 20:50:45,873 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 [2021-05-21 20:50:45,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:45,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957134586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:45,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:45,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291518668] [2021-05-21 20:50:45,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:45,956 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) [2021-05-21 20:50:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:46,039 INFO L93 Difference]: Finished difference Result 360 states and 1044 transitions. [2021-05-21 20:50:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:46,039 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 [2021-05-21 20:50:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:46,040 INFO L225 Difference]: With dead ends: 360 [2021-05-21 20:50:46,040 INFO L226 Difference]: Without dead ends: 360 [2021-05-21 20:50:46,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-21 20:50:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 250. [2021-05-21 20:50:46,042 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) [2021-05-21 20:50:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 754 transitions. [2021-05-21 20:50:46,043 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 754 transitions. Word has length 19 [2021-05-21 20:50:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:46,043 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 754 transitions. [2021-05-21 20:50:46,043 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) [2021-05-21 20:50:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 754 transitions. [2021-05-21 20:50:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:46,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:46,043 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:46,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-05-21 20:50:46,255 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash 311126640, now seen corresponding path program 3 times [2021-05-21 20:50:46,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:46,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129104529] [2021-05-21 20:50:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:46,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:46,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129104529] [2021-05-21 20:50:46,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129104529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:46,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963054607] [2021-05-21 20:50:46,287 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 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 [2021-05-21 20:50:46,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:46,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:46,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963054607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:46,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:46,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:46,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841381498] [2021-05-21 20:50:46,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:46,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:46,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:46,390 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) [2021-05-21 20:50:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:46,479 INFO L93 Difference]: Finished difference Result 330 states and 966 transitions. [2021-05-21 20:50:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:46,479 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 [2021-05-21 20:50:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:46,479 INFO L225 Difference]: With dead ends: 330 [2021-05-21 20:50:46,479 INFO L226 Difference]: Without dead ends: 321 [2021-05-21 20:50:46,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-21 20:50:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 250. [2021-05-21 20:50:46,482 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) [2021-05-21 20:50:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 750 transitions. [2021-05-21 20:50:46,482 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 750 transitions. Word has length 19 [2021-05-21 20:50:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:46,482 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 750 transitions. [2021-05-21 20:50:46,482 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) [2021-05-21 20:50:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 750 transitions. [2021-05-21 20:50:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:46,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:46,483 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:46,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-05-21 20:50:46,683 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1664534853, now seen corresponding path program 3 times [2021-05-21 20:50:46,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:46,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435304051] [2021-05-21 20:50:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:46,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435304051] [2021-05-21 20:50:46,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435304051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188516934] [2021-05-21 20:50:46,712 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 [2021-05-21 20:50:46,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:46,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:46,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188516934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:46,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:46,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:46,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542750336] [2021-05-21 20:50:46,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:46,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:46,783 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) [2021-05-21 20:50:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:46,876 INFO L93 Difference]: Finished difference Result 351 states and 1024 transitions. [2021-05-21 20:50:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:46,876 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 [2021-05-21 20:50:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:46,876 INFO L225 Difference]: With dead ends: 351 [2021-05-21 20:50:46,876 INFO L226 Difference]: Without dead ends: 351 [2021-05-21 20:50:46,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-21 20:50:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2021-05-21 20:50:46,879 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) [2021-05-21 20:50:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-05-21 20:50:46,879 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 19 [2021-05-21 20:50:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:46,879 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-05-21 20:50:46,879 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) [2021-05-21 20:50:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-05-21 20:50:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:46,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:46,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:47,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:47,080 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash -757034203, now seen corresponding path program 4 times [2021-05-21 20:50:47,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:47,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92281253] [2021-05-21 20:50:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:47,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92281253] [2021-05-21 20:50:47,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92281253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161823453] [2021-05-21 20:50:47,108 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 [2021-05-21 20:50:47,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:47,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:47,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:47,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161823453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:47,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:47,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375553649] [2021-05-21 20:50:47,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:47,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:47,177 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) [2021-05-21 20:50:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:47,260 INFO L93 Difference]: Finished difference Result 321 states and 937 transitions. [2021-05-21 20:50:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:47,261 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 [2021-05-21 20:50:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:47,261 INFO L225 Difference]: With dead ends: 321 [2021-05-21 20:50:47,261 INFO L226 Difference]: Without dead ends: 305 [2021-05-21 20:50:47,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-05-21 20:50:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 242. [2021-05-21 20:50:47,264 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) [2021-05-21 20:50:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 722 transitions. [2021-05-21 20:50:47,264 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 722 transitions. Word has length 19 [2021-05-21 20:50:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:47,264 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 722 transitions. [2021-05-21 20:50:47,264 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) [2021-05-21 20:50:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 722 transitions. [2021-05-21 20:50:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:47,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:47,265 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:47,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:47,465 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:47,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1495725994, now seen corresponding path program 4 times [2021-05-21 20:50:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:47,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354774939] [2021-05-21 20:50:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:47,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:47,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354774939] [2021-05-21 20:50:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354774939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:47,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274506611] [2021-05-21 20:50:47,511 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 [2021-05-21 20:50:47,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:47,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:47,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274506611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:47,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:47,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:50:47,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272764146] [2021-05-21 20:50:47,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:47,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:47,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:47,581 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) [2021-05-21 20:50:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:47,669 INFO L93 Difference]: Finished difference Result 379 states and 1110 transitions. [2021-05-21 20:50:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:47,669 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 [2021-05-21 20:50:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:47,670 INFO L225 Difference]: With dead ends: 379 [2021-05-21 20:50:47,670 INFO L226 Difference]: Without dead ends: 379 [2021-05-21 20:50:47,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-21 20:50:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 246. [2021-05-21 20:50:47,672 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) [2021-05-21 20:50:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-21 20:50:47,673 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-21 20:50:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:47,673 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-21 20:50:47,673 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) [2021-05-21 20:50:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-21 20:50:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:47,673 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:47,673 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:47,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-05-21 20:50:47,874 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:47,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1556074207, now seen corresponding path program 5 times [2021-05-21 20:50:47,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:47,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291396288] [2021-05-21 20:50:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:47,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:47,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291396288] [2021-05-21 20:50:47,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291396288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:47,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371246332] [2021-05-21 20:50:47,903 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 [2021-05-21 20:50:47,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:47,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:47,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:47,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:47,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371246332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:47,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:47,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:47,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355598565] [2021-05-21 20:50:47,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:47,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:47,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:47,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:47,999 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) [2021-05-21 20:50:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:48,078 INFO L93 Difference]: Finished difference Result 372 states and 1080 transitions. [2021-05-21 20:50:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:48,078 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 [2021-05-21 20:50:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:48,079 INFO L225 Difference]: With dead ends: 372 [2021-05-21 20:50:48,079 INFO L226 Difference]: Without dead ends: 364 [2021-05-21 20:50:48,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-21 20:50:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 262. [2021-05-21 20:50:48,082 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) [2021-05-21 20:50:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-05-21 20:50:48,082 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-05-21 20:50:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:48,082 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-05-21 20:50:48,082 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) [2021-05-21 20:50:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-05-21 20:50:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:48,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:48,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:48,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-21 20:50:48,283 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1524127254, now seen corresponding path program 5 times [2021-05-21 20:50:48,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:48,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027837567] [2021-05-21 20:50:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:48,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:48,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027837567] [2021-05-21 20:50:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027837567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:48,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452649573] [2021-05-21 20:50:48,312 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 [2021-05-21 20:50:48,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:48,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452649573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:48,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:48,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:48,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738710292] [2021-05-21 20:50:48,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:48,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:48,384 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) [2021-05-21 20:50:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:48,481 INFO L93 Difference]: Finished difference Result 408 states and 1192 transitions. [2021-05-21 20:50:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:48,481 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 [2021-05-21 20:50:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:48,482 INFO L225 Difference]: With dead ends: 408 [2021-05-21 20:50:48,482 INFO L226 Difference]: Without dead ends: 408 [2021-05-21 20:50:48,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-21 20:50:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 262. [2021-05-21 20:50:48,484 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) [2021-05-21 20:50:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-05-21 20:50:48,485 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-05-21 20:50:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:48,485 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-05-21 20:50:48,485 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) [2021-05-21 20:50:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-05-21 20:50:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:48,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:48,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:48,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-05-21 20:50:48,687 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash 898871962, now seen corresponding path program 6 times [2021-05-21 20:50:48,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:48,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25249880] [2021-05-21 20:50:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:48,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:48,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25249880] [2021-05-21 20:50:48,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25249880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:48,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587268639] [2021-05-21 20:50:48,720 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 [2021-05-21 20:50:48,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:48,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:48,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:48,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:48,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587268639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:48,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:48,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:48,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317329065] [2021-05-21 20:50:48,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:48,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:48,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:48,807 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) [2021-05-21 20:50:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:48,890 INFO L93 Difference]: Finished difference Result 354 states and 1042 transitions. [2021-05-21 20:50:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:48,890 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 [2021-05-21 20:50:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:48,890 INFO L225 Difference]: With dead ends: 354 [2021-05-21 20:50:48,890 INFO L226 Difference]: Without dead ends: 345 [2021-05-21 20:50:48,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-21 20:50:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 262. [2021-05-21 20:50:48,893 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) [2021-05-21 20:50:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 790 transitions. [2021-05-21 20:50:48,893 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 790 transitions. Word has length 19 [2021-05-21 20:50:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:48,893 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 790 transitions. [2021-05-21 20:50:48,893 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) [2021-05-21 20:50:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 790 transitions. [2021-05-21 20:50:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:48,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:48,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:49,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:49,094 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1076789531, now seen corresponding path program 6 times [2021-05-21 20:50:49,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:49,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166269021] [2021-05-21 20:50:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:49,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:49,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166269021] [2021-05-21 20:50:49,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166269021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:49,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742570776] [2021-05-21 20:50:49,125 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 [2021-05-21 20:50:49,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:49,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:49,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:49,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742570776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:49,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:49,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:49,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475960205] [2021-05-21 20:50:49,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:49,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:49,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:49,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:49,221 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) [2021-05-21 20:50:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:49,319 INFO L93 Difference]: Finished difference Result 326 states and 967 transitions. [2021-05-21 20:50:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:49,320 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 [2021-05-21 20:50:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:49,320 INFO L225 Difference]: With dead ends: 326 [2021-05-21 20:50:49,320 INFO L226 Difference]: Without dead ends: 326 [2021-05-21 20:50:49,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-21 20:50:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2021-05-21 20:50:49,323 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) [2021-05-21 20:50:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-21 20:50:49,324 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-21 20:50:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:49,324 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-21 20:50:49,324 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) [2021-05-21 20:50:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-21 20:50:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:49,325 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:49,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:49,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-05-21 20:50:49,537 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash 132155580, now seen corresponding path program 7 times [2021-05-21 20:50:49,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:49,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481663354] [2021-05-21 20:50:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:49,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481663354] [2021-05-21 20:50:49,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481663354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920847253] [2021-05-21 20:50:49,563 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 [2021-05-21 20:50:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:49,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:49,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:49,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920847253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:49,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:49,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102864003] [2021-05-21 20:50:49,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:49,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:49,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:49,640 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) [2021-05-21 20:50:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:49,719 INFO L93 Difference]: Finished difference Result 492 states and 1411 transitions. [2021-05-21 20:50:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:49,719 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 [2021-05-21 20:50:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:49,720 INFO L225 Difference]: With dead ends: 492 [2021-05-21 20:50:49,720 INFO L226 Difference]: Without dead ends: 468 [2021-05-21 20:50:49,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-21 20:50:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-05-21 20:50:49,723 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) [2021-05-21 20:50:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 767 transitions. [2021-05-21 20:50:49,723 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 767 transitions. Word has length 19 [2021-05-21 20:50:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:49,723 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 767 transitions. [2021-05-21 20:50:49,723 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) [2021-05-21 20:50:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 767 transitions. [2021-05-21 20:50:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:49,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:49,723 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:49,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:49,924 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash 48107957, now seen corresponding path program 7 times [2021-05-21 20:50:49,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:49,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815919080] [2021-05-21 20:50:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:49,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815919080] [2021-05-21 20:50:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815919080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582827597] [2021-05-21 20:50:49,956 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 [2021-05-21 20:50:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:49,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:50,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582827597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:50,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:50,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:50:50,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079805648] [2021-05-21 20:50:50,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:50,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:50,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:50,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:50,023 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) [2021-05-21 20:50:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:50,108 INFO L93 Difference]: Finished difference Result 608 states and 1788 transitions. [2021-05-21 20:50:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:50,108 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 [2021-05-21 20:50:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:50,109 INFO L225 Difference]: With dead ends: 608 [2021-05-21 20:50:50,109 INFO L226 Difference]: Without dead ends: 608 [2021-05-21 20:50:50,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-05-21 20:50:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 264. [2021-05-21 20:50:50,112 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) [2021-05-21 20:50:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 803 transitions. [2021-05-21 20:50:50,112 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 803 transitions. Word has length 19 [2021-05-21 20:50:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:50,112 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 803 transitions. [2021-05-21 20:50:50,112 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) [2021-05-21 20:50:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 803 transitions. [2021-05-21 20:50:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:50,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:50,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:50,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:50,334 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash -296709027, now seen corresponding path program 8 times [2021-05-21 20:50:50,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:50,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869219445] [2021-05-21 20:50:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:50,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:50,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869219445] [2021-05-21 20:50:50,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869219445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:50,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178422028] [2021-05-21 20:50:50,360 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 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 [2021-05-21 20:50:50,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:50,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:50,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:50,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178422028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:50,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:50,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:50,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360941053] [2021-05-21 20:50:50,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:50,435 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) [2021-05-21 20:50:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:50,519 INFO L93 Difference]: Finished difference Result 554 states and 1618 transitions. [2021-05-21 20:50:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:50,520 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 [2021-05-21 20:50:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:50,520 INFO L225 Difference]: With dead ends: 554 [2021-05-21 20:50:50,520 INFO L226 Difference]: Without dead ends: 546 [2021-05-21 20:50:50,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-05-21 20:50:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 280. [2021-05-21 20:50:50,524 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) [2021-05-21 20:50:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-05-21 20:50:50,524 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-05-21 20:50:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:50,524 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-05-21 20:50:50,524 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) [2021-05-21 20:50:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-05-21 20:50:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:50,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:50,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:50,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:50,725 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:50,725 INFO L82 PathProgramCache]: Analyzing trace with hash -264762074, now seen corresponding path program 8 times [2021-05-21 20:50:50,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:50,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982501610] [2021-05-21 20:50:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:50,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982501610] [2021-05-21 20:50:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982501610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463253022] [2021-05-21 20:50:50,759 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 [2021-05-21 20:50:50,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:50,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:50,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:50,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463253022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:50,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:50,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:50:50,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570262552] [2021-05-21 20:50:50,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:50,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:50,847 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) [2021-05-21 20:50:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:50,971 INFO L93 Difference]: Finished difference Result 521 states and 1530 transitions. [2021-05-21 20:50:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:50,971 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 [2021-05-21 20:50:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:50,972 INFO L225 Difference]: With dead ends: 521 [2021-05-21 20:50:50,972 INFO L226 Difference]: Without dead ends: 521 [2021-05-21 20:50:50,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-21 20:50:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 280. [2021-05-21 20:50:50,975 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) [2021-05-21 20:50:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-05-21 20:50:50,976 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-05-21 20:50:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:50,976 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-05-21 20:50:50,976 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) [2021-05-21 20:50:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-05-21 20:50:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:50,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:50,976 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:51,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-05-21 20:50:51,177 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2136730154, now seen corresponding path program 9 times [2021-05-21 20:50:51,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:51,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160589503] [2021-05-21 20:50:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:51,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160589503] [2021-05-21 20:50:51,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160589503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343968799] [2021-05-21 20:50:51,207 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 [2021-05-21 20:50:51,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:51,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:51,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343968799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:51,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:51,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:50:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140499031] [2021-05-21 20:50:51,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:51,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:51,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:51,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:51,294 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) [2021-05-21 20:50:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:51,384 INFO L93 Difference]: Finished difference Result 518 states and 1507 transitions. [2021-05-21 20:50:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:51,384 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 [2021-05-21 20:50:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:51,384 INFO L225 Difference]: With dead ends: 518 [2021-05-21 20:50:51,384 INFO L226 Difference]: Without dead ends: 509 [2021-05-21 20:50:51,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-05-21 20:50:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 280. [2021-05-21 20:50:51,388 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) [2021-05-21 20:50:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 855 transitions. [2021-05-21 20:50:51,388 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 855 transitions. Word has length 19 [2021-05-21 20:50:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:51,388 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 855 transitions. [2021-05-21 20:50:51,388 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) [2021-05-21 20:50:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 855 transitions. [2021-05-21 20:50:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:51,389 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:51,389 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:51,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:51,589 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 182575649, now seen corresponding path program 9 times [2021-05-21 20:50:51,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:51,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411835263] [2021-05-21 20:50:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:51,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:51,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411835263] [2021-05-21 20:50:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411835263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:51,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941136466] [2021-05-21 20:50:51,619 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 [2021-05-21 20:50:51,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:51,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:51,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:51,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941136466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:51,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:51,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:51,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147228681] [2021-05-21 20:50:51,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:51,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:51,688 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) [2021-05-21 20:50:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:51,771 INFO L93 Difference]: Finished difference Result 572 states and 1674 transitions. [2021-05-21 20:50:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:51,771 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 [2021-05-21 20:50:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:51,772 INFO L225 Difference]: With dead ends: 572 [2021-05-21 20:50:51,772 INFO L226 Difference]: Without dead ends: 572 [2021-05-21 20:50:51,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-05-21 20:50:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 269. [2021-05-21 20:50:51,775 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) [2021-05-21 20:50:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 822 transitions. [2021-05-21 20:50:51,775 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 822 transitions. Word has length 19 [2021-05-21 20:50:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:51,775 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 822 transitions. [2021-05-21 20:50:51,775 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) [2021-05-21 20:50:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 822 transitions. [2021-05-21 20:50:51,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:51,776 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:51,776 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:51,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:51,999 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash -12394796, now seen corresponding path program 10 times [2021-05-21 20:50:52,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:52,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558749881] [2021-05-21 20:50:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:52,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:52,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558749881] [2021-05-21 20:50:52,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558749881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:52,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:52,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:52,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964896563] [2021-05-21 20:50:52,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:52,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:52,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:52,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:52,025 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) [2021-05-21 20:50:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:52,113 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-05-21 20:50:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:52,113 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 [2021-05-21 20:50:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:52,114 INFO L225 Difference]: With dead ends: 413 [2021-05-21 20:50:52,114 INFO L226 Difference]: Without dead ends: 389 [2021-05-21 20:50:52,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-21 20:50:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 273. [2021-05-21 20:50:52,117 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) [2021-05-21 20:50:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 828 transitions. [2021-05-21 20:50:52,117 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 828 transitions. Word has length 19 [2021-05-21 20:50:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:52,117 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 828 transitions. [2021-05-21 20:50:52,117 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) [2021-05-21 20:50:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 828 transitions. [2021-05-21 20:50:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:52,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:52,118 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:52,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2021-05-21 20:50:52,118 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1941255398, now seen corresponding path program 11 times [2021-05-21 20:50:52,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:52,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217637685] [2021-05-21 20:50:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:52,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:52,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217637685] [2021-05-21 20:50:52,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217637685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:52,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:52,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:52,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292819649] [2021-05-21 20:50:52,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:52,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:52,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:52,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:52,146 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) [2021-05-21 20:50:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:52,242 INFO L93 Difference]: Finished difference Result 397 states and 1148 transitions. [2021-05-21 20:50:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:52,242 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 [2021-05-21 20:50:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:52,243 INFO L225 Difference]: With dead ends: 397 [2021-05-21 20:50:52,243 INFO L226 Difference]: Without dead ends: 391 [2021-05-21 20:50:52,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-21 20:50:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2021-05-21 20:50:52,246 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) [2021-05-21 20:50:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 853 transitions. [2021-05-21 20:50:52,247 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 853 transitions. Word has length 19 [2021-05-21 20:50:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:52,247 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 853 transitions. [2021-05-21 20:50:52,247 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) [2021-05-21 20:50:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 853 transitions. [2021-05-21 20:50:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:52,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:52,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:52,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2021-05-21 20:50:52,247 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:52,247 INFO L82 PathProgramCache]: Analyzing trace with hash -449594866, now seen corresponding path program 12 times [2021-05-21 20:50:52,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:52,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864468082] [2021-05-21 20:50:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:52,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:52,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864468082] [2021-05-21 20:50:52,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864468082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:52,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:52,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:52,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479774272] [2021-05-21 20:50:52,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:52,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:52,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:52,275 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) [2021-05-21 20:50:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:52,396 INFO L93 Difference]: Finished difference Result 361 states and 1065 transitions. [2021-05-21 20:50:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:52,396 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 [2021-05-21 20:50:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:52,396 INFO L225 Difference]: With dead ends: 361 [2021-05-21 20:50:52,396 INFO L226 Difference]: Without dead ends: 346 [2021-05-21 20:50:52,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-21 20:50:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2021-05-21 20:50:52,399 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) [2021-05-21 20:50:52,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 820 transitions. [2021-05-21 20:50:52,400 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 820 transitions. Word has length 19 [2021-05-21 20:50:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:52,400 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 820 transitions. [2021-05-21 20:50:52,400 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) [2021-05-21 20:50:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 820 transitions. [2021-05-21 20:50:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:52,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:52,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:52,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2021-05-21 20:50:52,400 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash -405487539, now seen corresponding path program 10 times [2021-05-21 20:50:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:52,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982987158] [2021-05-21 20:50:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:52,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982987158] [2021-05-21 20:50:52,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982987158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632747062] [2021-05-21 20:50:52,431 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 [2021-05-21 20:50:52,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:52,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:52,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:52,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:52,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632747062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:52,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:52,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:50:52,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188608648] [2021-05-21 20:50:52,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:52,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:52,497 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) [2021-05-21 20:50:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:52,581 INFO L93 Difference]: Finished difference Result 531 states and 1547 transitions. [2021-05-21 20:50:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:52,582 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 [2021-05-21 20:50:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:52,582 INFO L225 Difference]: With dead ends: 531 [2021-05-21 20:50:52,582 INFO L226 Difference]: Without dead ends: 531 [2021-05-21 20:50:52,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-05-21 20:50:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 254. [2021-05-21 20:50:52,585 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) [2021-05-21 20:50:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 762 transitions. [2021-05-21 20:50:52,586 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 762 transitions. Word has length 19 [2021-05-21 20:50:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:52,586 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 762 transitions. [2021-05-21 20:50:52,586 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) [2021-05-21 20:50:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 762 transitions. [2021-05-21 20:50:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:52,586 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:52,586 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:52,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-05-21 20:50:52,787 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1305660447, now seen corresponding path program 11 times [2021-05-21 20:50:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:52,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574133023] [2021-05-21 20:50:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:52,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:52,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574133023] [2021-05-21 20:50:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574133023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065381337] [2021-05-21 20:50:52,827 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 [2021-05-21 20:50:52,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:52,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:52,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:52,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065381337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:52,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:52,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:52,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547738914] [2021-05-21 20:50:52,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:52,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:52,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:52,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:52,909 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) [2021-05-21 20:50:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:52,988 INFO L93 Difference]: Finished difference Result 470 states and 1356 transitions. [2021-05-21 20:50:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:52,988 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 [2021-05-21 20:50:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:52,989 INFO L225 Difference]: With dead ends: 470 [2021-05-21 20:50:52,989 INFO L226 Difference]: Without dead ends: 464 [2021-05-21 20:50:52,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-21 20:50:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 266. [2021-05-21 20:50:52,992 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) [2021-05-21 20:50:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 801 transitions. [2021-05-21 20:50:52,993 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 801 transitions. Word has length 19 [2021-05-21 20:50:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:52,993 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 801 transitions. [2021-05-21 20:50:52,993 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) [2021-05-21 20:50:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 801 transitions. [2021-05-21 20:50:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:52,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:52,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:53,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:53,194 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1773947229, now seen corresponding path program 12 times [2021-05-21 20:50:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:53,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015561629] [2021-05-21 20:50:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:53,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015561629] [2021-05-21 20:50:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015561629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:53,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957819487] [2021-05-21 20:50:53,222 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 [2021-05-21 20:50:53,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:50:53,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:53,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:53,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957819487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:53,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:53,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:53,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696789144] [2021-05-21 20:50:53,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:53,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:53,294 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) [2021-05-21 20:50:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:53,376 INFO L93 Difference]: Finished difference Result 448 states and 1309 transitions. [2021-05-21 20:50:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:53,376 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 [2021-05-21 20:50:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:53,377 INFO L225 Difference]: With dead ends: 448 [2021-05-21 20:50:53,377 INFO L226 Difference]: Without dead ends: 448 [2021-05-21 20:50:53,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-05-21 20:50:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 251. [2021-05-21 20:50:53,379 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) [2021-05-21 20:50:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 756 transitions. [2021-05-21 20:50:53,380 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 756 transitions. Word has length 19 [2021-05-21 20:50:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:53,380 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 756 transitions. [2021-05-21 20:50:53,380 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) [2021-05-21 20:50:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 756 transitions. [2021-05-21 20:50:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:53,380 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:53,380 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:53,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:53,581 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -964970507, now seen corresponding path program 13 times [2021-05-21 20:50:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:53,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578406600] [2021-05-21 20:50:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:53,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:53,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578406600] [2021-05-21 20:50:53,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578406600] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:53,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:53,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:53,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141690091] [2021-05-21 20:50:53,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:53,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:53,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:53,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:53,608 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) [2021-05-21 20:50:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:53,681 INFO L93 Difference]: Finished difference Result 469 states and 1343 transitions. [2021-05-21 20:50:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:53,681 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 [2021-05-21 20:50:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:53,682 INFO L225 Difference]: With dead ends: 469 [2021-05-21 20:50:53,682 INFO L226 Difference]: Without dead ends: 461 [2021-05-21 20:50:53,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-21 20:50:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 271. [2021-05-21 20:50:53,685 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) [2021-05-21 20:50:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 822 transitions. [2021-05-21 20:50:53,685 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 822 transitions. Word has length 19 [2021-05-21 20:50:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:53,685 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 822 transitions. [2021-05-21 20:50:53,685 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) [2021-05-21 20:50:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 822 transitions. [2021-05-21 20:50:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:53,686 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:53,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:53,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2021-05-21 20:50:53,686 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -584232867, now seen corresponding path program 14 times [2021-05-21 20:50:53,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:53,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923198357] [2021-05-21 20:50:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:53,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:53,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923198357] [2021-05-21 20:50:53,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923198357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:53,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:53,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:53,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274519901] [2021-05-21 20:50:53,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:53,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:53,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:53,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:53,719 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) [2021-05-21 20:50:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:53,790 INFO L93 Difference]: Finished difference Result 475 states and 1358 transitions. [2021-05-21 20:50:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:53,791 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 [2021-05-21 20:50:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:53,791 INFO L225 Difference]: With dead ends: 475 [2021-05-21 20:50:53,791 INFO L226 Difference]: Without dead ends: 467 [2021-05-21 20:50:53,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-21 20:50:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 275. [2021-05-21 20:50:53,795 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) [2021-05-21 20:50:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 831 transitions. [2021-05-21 20:50:53,795 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 831 transitions. Word has length 19 [2021-05-21 20:50:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:53,795 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 831 transitions. [2021-05-21 20:50:53,795 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) [2021-05-21 20:50:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 831 transitions. [2021-05-21 20:50:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:53,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:53,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:53,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2021-05-21 20:50:53,796 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash 967392422, now seen corresponding path program 13 times [2021-05-21 20:50:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:53,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702395084] [2021-05-21 20:50:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:53,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:53,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702395084] [2021-05-21 20:50:53,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702395084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:53,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988999489] [2021-05-21 20:50:53,829 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 [2021-05-21 20:50:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:53,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:53,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988999489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:53,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:53,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:50:53,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963157461] [2021-05-21 20:50:53,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:53,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:53,926 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) [2021-05-21 20:50:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:54,009 INFO L93 Difference]: Finished difference Result 493 states and 1439 transitions. [2021-05-21 20:50:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:54,009 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 [2021-05-21 20:50:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:54,010 INFO L225 Difference]: With dead ends: 493 [2021-05-21 20:50:54,010 INFO L226 Difference]: Without dead ends: 493 [2021-05-21 20:50:54,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-21 20:50:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 281. [2021-05-21 20:50:54,013 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) [2021-05-21 20:50:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 858 transitions. [2021-05-21 20:50:54,013 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 858 transitions. Word has length 19 [2021-05-21 20:50:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:54,014 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 858 transitions. [2021-05-21 20:50:54,014 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) [2021-05-21 20:50:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 858 transitions. [2021-05-21 20:50:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:54,014 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:54,014 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:54,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-05-21 20:50:54,214 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1897553598, now seen corresponding path program 14 times [2021-05-21 20:50:54,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:54,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703764583] [2021-05-21 20:50:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:54,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:54,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703764583] [2021-05-21 20:50:54,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703764583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:54,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556605514] [2021-05-21 20:50:54,258 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 [2021-05-21 20:50:54,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:54,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:54,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:54,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556605514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:54,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:54,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:50:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224770605] [2021-05-21 20:50:54,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:54,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:54,346 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) [2021-05-21 20:50:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:54,426 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-05-21 20:50:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:54,427 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 [2021-05-21 20:50:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:54,427 INFO L225 Difference]: With dead ends: 475 [2021-05-21 20:50:54,427 INFO L226 Difference]: Without dead ends: 469 [2021-05-21 20:50:54,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-21 20:50:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 281. [2021-05-21 20:50:54,430 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) [2021-05-21 20:50:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-05-21 20:50:54,431 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-05-21 20:50:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:54,431 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-05-21 20:50:54,431 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) [2021-05-21 20:50:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-05-21 20:50:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:54,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:54,431 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:54,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:54,633 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1169104647, now seen corresponding path program 15 times [2021-05-21 20:50:54,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:54,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539678492] [2021-05-21 20:50:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:54,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:54,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539678492] [2021-05-21 20:50:54,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539678492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:54,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531331936] [2021-05-21 20:50:54,670 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 [2021-05-21 20:50:54,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:54,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:54,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531331936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:54,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:54,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:54,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871259713] [2021-05-21 20:50:54,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:54,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:54,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:54,765 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) [2021-05-21 20:50:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:54,851 INFO L93 Difference]: Finished difference Result 494 states and 1409 transitions. [2021-05-21 20:50:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:54,851 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 [2021-05-21 20:50:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:54,852 INFO L225 Difference]: With dead ends: 494 [2021-05-21 20:50:54,852 INFO L226 Difference]: Without dead ends: 486 [2021-05-21 20:50:54,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-21 20:50:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 281. [2021-05-21 20:50:54,855 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) [2021-05-21 20:50:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-05-21 20:50:54,855 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-05-21 20:50:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:54,855 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-05-21 20:50:54,855 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) [2021-05-21 20:50:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-05-21 20:50:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:54,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:54,856 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:55,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-05-21 20:50:55,056 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1167792078, now seen corresponding path program 15 times [2021-05-21 20:50:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:55,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908455721] [2021-05-21 20:50:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:55,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:55,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908455721] [2021-05-21 20:50:55,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908455721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:55,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575319638] [2021-05-21 20:50:55,090 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 [2021-05-21 20:50:55,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:50:55,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:55,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:55,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:55,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575319638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:55,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:55,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:50:55,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636683879] [2021-05-21 20:50:55,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:55,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:55,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:55,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:55,180 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) [2021-05-21 20:50:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:55,282 INFO L93 Difference]: Finished difference Result 484 states and 1404 transitions. [2021-05-21 20:50:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:55,283 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 [2021-05-21 20:50:55,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:55,283 INFO L225 Difference]: With dead ends: 484 [2021-05-21 20:50:55,283 INFO L226 Difference]: Without dead ends: 484 [2021-05-21 20:50:55,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-21 20:50:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 272. [2021-05-21 20:50:55,286 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) [2021-05-21 20:50:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-05-21 20:50:55,287 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-05-21 20:50:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:55,287 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-05-21 20:50:55,287 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) [2021-05-21 20:50:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-05-21 20:50:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:55,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:55,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:55,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-05-21 20:50:55,488 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1086551406, now seen corresponding path program 16 times [2021-05-21 20:50:55,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:55,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990728998] [2021-05-21 20:50:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:55,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990728998] [2021-05-21 20:50:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990728998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721700865] [2021-05-21 20:50:55,518 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 [2021-05-21 20:50:55,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:55,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:55,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:55,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721700865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:55,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:55,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:50:55,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623961330] [2021-05-21 20:50:55,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:55,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:55,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:55,606 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) [2021-05-21 20:50:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:55,680 INFO L93 Difference]: Finished difference Result 439 states and 1276 transitions. [2021-05-21 20:50:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:55,680 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 [2021-05-21 20:50:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:55,680 INFO L225 Difference]: With dead ends: 439 [2021-05-21 20:50:55,680 INFO L226 Difference]: Without dead ends: 430 [2021-05-21 20:50:55,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-21 20:50:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 272. [2021-05-21 20:50:55,683 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) [2021-05-21 20:50:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-21 20:50:55,684 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-21 20:50:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:55,684 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-21 20:50:55,684 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) [2021-05-21 20:50:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-21 20:50:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:55,684 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:55,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:55,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-05-21 20:50:55,885 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -889110087, now seen corresponding path program 16 times [2021-05-21 20:50:55,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:55,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661391111] [2021-05-21 20:50:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:55,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:55,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661391111] [2021-05-21 20:50:55,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661391111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:55,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104012784] [2021-05-21 20:50:55,921 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 [2021-05-21 20:50:55,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:55,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:56,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104012784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:56,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:56,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:56,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529268772] [2021-05-21 20:50:56,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:56,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:56,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:56,029 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) [2021-05-21 20:50:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:56,124 INFO L93 Difference]: Finished difference Result 466 states and 1359 transitions. [2021-05-21 20:50:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:56,124 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 [2021-05-21 20:50:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:56,125 INFO L225 Difference]: With dead ends: 466 [2021-05-21 20:50:56,125 INFO L226 Difference]: Without dead ends: 466 [2021-05-21 20:50:56,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-21 20:50:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 268. [2021-05-21 20:50:56,128 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) [2021-05-21 20:50:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 814 transitions. [2021-05-21 20:50:56,129 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 814 transitions. Word has length 19 [2021-05-21 20:50:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:56,129 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 814 transitions. [2021-05-21 20:50:56,129 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) [2021-05-21 20:50:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 814 transitions. [2021-05-21 20:50:56,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:56,129 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:56,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:56,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:56,330 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:56,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1710395246, now seen corresponding path program 17 times [2021-05-21 20:50:56,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:56,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048115496] [2021-05-21 20:50:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:56,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:56,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048115496] [2021-05-21 20:50:56,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048115496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:56,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:56,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841027985] [2021-05-21 20:50:56,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:56,360 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) [2021-05-21 20:50:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:56,462 INFO L93 Difference]: Finished difference Result 410 states and 1187 transitions. [2021-05-21 20:50:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:56,462 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 [2021-05-21 20:50:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:56,463 INFO L225 Difference]: With dead ends: 410 [2021-05-21 20:50:56,463 INFO L226 Difference]: Without dead ends: 404 [2021-05-21 20:50:56,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-21 20:50:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2021-05-21 20:50:56,466 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) [2021-05-21 20:50:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 839 transitions. [2021-05-21 20:50:56,466 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 839 transitions. Word has length 19 [2021-05-21 20:50:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:56,466 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 839 transitions. [2021-05-21 20:50:56,466 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) [2021-05-21 20:50:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 839 transitions. [2021-05-21 20:50:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:56,467 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:56,467 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:56,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2021-05-21 20:50:56,467 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash 608481094, now seen corresponding path program 18 times [2021-05-21 20:50:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:56,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856460738] [2021-05-21 20:50:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:56,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856460738] [2021-05-21 20:50:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856460738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:56,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:56,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:56,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057486292] [2021-05-21 20:50:56,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:56,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:56,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:56,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:56,496 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) [2021-05-21 20:50:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:56,590 INFO L93 Difference]: Finished difference Result 374 states and 1104 transitions. [2021-05-21 20:50:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:56,591 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 [2021-05-21 20:50:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:56,591 INFO L225 Difference]: With dead ends: 374 [2021-05-21 20:50:56,591 INFO L226 Difference]: Without dead ends: 363 [2021-05-21 20:50:56,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-21 20:50:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 268. [2021-05-21 20:50:56,594 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) [2021-05-21 20:50:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 813 transitions. [2021-05-21 20:50:56,594 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 813 transitions. Word has length 19 [2021-05-21 20:50:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:56,594 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 813 transitions. [2021-05-21 20:50:56,594 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) [2021-05-21 20:50:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 813 transitions. [2021-05-21 20:50:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:56,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:56,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:56,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2021-05-21 20:50:56,595 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1860559839, now seen corresponding path program 17 times [2021-05-21 20:50:56,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:56,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207246283] [2021-05-21 20:50:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:56,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:56,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207246283] [2021-05-21 20:50:56,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207246283] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:56,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:56,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:56,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669496302] [2021-05-21 20:50:56,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:56,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:56,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:56,629 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) [2021-05-21 20:50:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:56,717 INFO L93 Difference]: Finished difference Result 435 states and 1255 transitions. [2021-05-21 20:50:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:56,718 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 [2021-05-21 20:50:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:56,718 INFO L225 Difference]: With dead ends: 435 [2021-05-21 20:50:56,718 INFO L226 Difference]: Without dead ends: 429 [2021-05-21 20:50:56,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-21 20:50:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 274. [2021-05-21 20:50:56,721 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) [2021-05-21 20:50:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 827 transitions. [2021-05-21 20:50:56,721 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 827 transitions. Word has length 19 [2021-05-21 20:50:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:56,722 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 827 transitions. [2021-05-21 20:50:56,722 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) [2021-05-21 20:50:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 827 transitions. [2021-05-21 20:50:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:56,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:56,722 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:56,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2021-05-21 20:50:56,722 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1590050147, now seen corresponding path program 18 times [2021-05-21 20:50:56,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:56,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163176499] [2021-05-21 20:50:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:56,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:56,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163176499] [2021-05-21 20:50:56,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163176499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:56,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:56,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842899849] [2021-05-21 20:50:56,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:56,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:56,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:56,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:56,756 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) [2021-05-21 20:50:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:56,841 INFO L93 Difference]: Finished difference Result 413 states and 1218 transitions. [2021-05-21 20:50:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:56,842 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 [2021-05-21 20:50:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:56,842 INFO L225 Difference]: With dead ends: 413 [2021-05-21 20:50:56,842 INFO L226 Difference]: Without dead ends: 413 [2021-05-21 20:50:56,842 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 [2021-05-21 20:50:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-21 20:50:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 253. [2021-05-21 20:50:56,845 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) [2021-05-21 20:50:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-05-21 20:50:56,845 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 19 [2021-05-21 20:50:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:56,845 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-05-21 20:50:56,845 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) [2021-05-21 20:50:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-05-21 20:50:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:56,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:56,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:56,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2021-05-21 20:50:56,846 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash 53973003, now seen corresponding path program 19 times [2021-05-21 20:50:56,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:56,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145988900] [2021-05-21 20:50:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:56,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:56,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145988900] [2021-05-21 20:50:56,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145988900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:56,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:56,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:56,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517259944] [2021-05-21 20:50:56,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:56,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:56,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:56,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:56,872 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) [2021-05-21 20:50:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:56,960 INFO L93 Difference]: Finished difference Result 398 states and 1147 transitions. [2021-05-21 20:50:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:56,960 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 [2021-05-21 20:50:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:56,961 INFO L225 Difference]: With dead ends: 398 [2021-05-21 20:50:56,961 INFO L226 Difference]: Without dead ends: 382 [2021-05-21 20:50:56,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-21 20:50:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 259. [2021-05-21 20:50:56,963 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) [2021-05-21 20:50:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 780 transitions. [2021-05-21 20:50:56,964 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 780 transitions. Word has length 19 [2021-05-21 20:50:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:56,964 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 780 transitions. [2021-05-21 20:50:56,964 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) [2021-05-21 20:50:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 780 transitions. [2021-05-21 20:50:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:56,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:56,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:56,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2021-05-21 20:50:56,964 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash -481846493, now seen corresponding path program 20 times [2021-05-21 20:50:56,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:56,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120405100] [2021-05-21 20:50:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:56,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:56,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120405100] [2021-05-21 20:50:56,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120405100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:56,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:56,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:56,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198041586] [2021-05-21 20:50:56,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:56,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:56,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:56,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:56,993 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) [2021-05-21 20:50:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:57,098 INFO L93 Difference]: Finished difference Result 427 states and 1201 transitions. [2021-05-21 20:50:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:57,098 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 [2021-05-21 20:50:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:57,099 INFO L225 Difference]: With dead ends: 427 [2021-05-21 20:50:57,099 INFO L226 Difference]: Without dead ends: 419 [2021-05-21 20:50:57,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-21 20:50:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 275. [2021-05-21 20:50:57,102 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) [2021-05-21 20:50:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 824 transitions. [2021-05-21 20:50:57,103 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 824 transitions. Word has length 19 [2021-05-21 20:50:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:57,103 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 824 transitions. [2021-05-21 20:50:57,103 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) [2021-05-21 20:50:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 824 transitions. [2021-05-21 20:50:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:57,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:57,103 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:57,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2021-05-21 20:50:57,103 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:57,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash -101108853, now seen corresponding path program 21 times [2021-05-21 20:50:57,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:57,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188671643] [2021-05-21 20:50:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:57,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:57,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188671643] [2021-05-21 20:50:57,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188671643] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:50:57,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:50:57,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:50:57,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772257174] [2021-05-21 20:50:57,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:50:57,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:50:57,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:50:57,132 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) [2021-05-21 20:50:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:57,226 INFO L93 Difference]: Finished difference Result 390 states and 1115 transitions. [2021-05-21 20:50:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:57,226 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 [2021-05-21 20:50:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:57,227 INFO L225 Difference]: With dead ends: 390 [2021-05-21 20:50:57,227 INFO L226 Difference]: Without dead ends: 380 [2021-05-21 20:50:57,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-21 20:50:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 265. [2021-05-21 20:50:57,230 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) [2021-05-21 20:50:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 796 transitions. [2021-05-21 20:50:57,230 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 796 transitions. Word has length 19 [2021-05-21 20:50:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:57,230 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 796 transitions. [2021-05-21 20:50:57,230 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) [2021-05-21 20:50:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 796 transitions. [2021-05-21 20:50:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:57,230 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:57,231 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:57,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2021-05-21 20:50:57,231 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:57,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1901365676, now seen corresponding path program 19 times [2021-05-21 20:50:57,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:57,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009587672] [2021-05-21 20:50:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:57,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:57,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009587672] [2021-05-21 20:50:57,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009587672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:57,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936991308] [2021-05-21 20:50:57,259 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 [2021-05-21 20:50:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:57,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936991308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:57,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:57,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:50:57,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090544145] [2021-05-21 20:50:57,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:57,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:57,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:57,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:57,325 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) [2021-05-21 20:50:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:57,404 INFO L93 Difference]: Finished difference Result 537 states and 1572 transitions. [2021-05-21 20:50:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:57,404 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 [2021-05-21 20:50:57,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:57,405 INFO L225 Difference]: With dead ends: 537 [2021-05-21 20:50:57,405 INFO L226 Difference]: Without dead ends: 537 [2021-05-21 20:50:57,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-21 20:50:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 271. [2021-05-21 20:50:57,408 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) [2021-05-21 20:50:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 817 transitions. [2021-05-21 20:50:57,409 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 817 transitions. Word has length 19 [2021-05-21 20:50:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:57,409 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 817 transitions. [2021-05-21 20:50:57,409 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) [2021-05-21 20:50:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 817 transitions. [2021-05-21 20:50:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:57,409 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:57,409 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:57,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-05-21 20:50:57,610 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2057197508, now seen corresponding path program 20 times [2021-05-21 20:50:57,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:57,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305339604] [2021-05-21 20:50:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:57,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:57,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305339604] [2021-05-21 20:50:57,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305339604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:57,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405451175] [2021-05-21 20:50:57,639 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 [2021-05-21 20:50:57,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:57,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:57,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:57,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:57,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405451175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:57,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:57,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:57,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035229511] [2021-05-21 20:50:57,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:57,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:57,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:57,718 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) [2021-05-21 20:50:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:57,805 INFO L93 Difference]: Finished difference Result 552 states and 1596 transitions. [2021-05-21 20:50:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:57,806 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 [2021-05-21 20:50:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:57,806 INFO L225 Difference]: With dead ends: 552 [2021-05-21 20:50:57,806 INFO L226 Difference]: Without dead ends: 552 [2021-05-21 20:50:57,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-05-21 20:50:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 277. [2021-05-21 20:50:57,810 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) [2021-05-21 20:50:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 844 transitions. [2021-05-21 20:50:57,811 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 844 transitions. Word has length 19 [2021-05-21 20:50:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:57,811 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 844 transitions. [2021-05-21 20:50:57,811 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) [2021-05-21 20:50:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 844 transitions. [2021-05-21 20:50:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:57,811 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:57,811 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:58,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:58,022 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1127036332, now seen corresponding path program 21 times [2021-05-21 20:50:58,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:58,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927887331] [2021-05-21 20:50:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:58,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927887331] [2021-05-21 20:50:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927887331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818845426] [2021-05-21 20:50:58,050 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 [2021-05-21 20:50:58,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:50:58,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:58,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:58,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:58,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818845426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:58,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:58,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:58,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174338130] [2021-05-21 20:50:58,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:58,128 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) [2021-05-21 20:50:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:58,209 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-05-21 20:50:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:58,209 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 [2021-05-21 20:50:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:58,210 INFO L225 Difference]: With dead ends: 498 [2021-05-21 20:50:58,210 INFO L226 Difference]: Without dead ends: 492 [2021-05-21 20:50:58,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-05-21 20:50:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 274. [2021-05-21 20:50:58,213 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) [2021-05-21 20:50:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 834 transitions. [2021-05-21 20:50:58,213 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 834 transitions. Word has length 19 [2021-05-21 20:50:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:58,213 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 834 transitions. [2021-05-21 20:50:58,213 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) [2021-05-21 20:50:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 834 transitions. [2021-05-21 20:50:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:58,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:58,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:58,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:58,414 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1979218041, now seen corresponding path program 22 times [2021-05-21 20:50:58,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:58,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438501913] [2021-05-21 20:50:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:58,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:58,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438501913] [2021-05-21 20:50:58,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438501913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:58,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647261302] [2021-05-21 20:50:58,451 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 [2021-05-21 20:50:58,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:58,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:58,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:58,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647261302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:58,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:58,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:50:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375723505] [2021-05-21 20:50:58,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:50:58,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:50:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:50:58,539 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) [2021-05-21 20:50:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:58,616 INFO L93 Difference]: Finished difference Result 476 states and 1382 transitions. [2021-05-21 20:50:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:58,616 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 [2021-05-21 20:50:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:58,617 INFO L225 Difference]: With dead ends: 476 [2021-05-21 20:50:58,617 INFO L226 Difference]: Without dead ends: 460 [2021-05-21 20:50:58,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:50:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-21 20:50:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 271. [2021-05-21 20:50:58,620 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) [2021-05-21 20:50:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-05-21 20:50:58,620 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-05-21 20:50:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:58,620 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-05-21 20:50:58,620 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) [2021-05-21 20:50:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-05-21 20:50:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:58,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:58,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:58,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:58,826 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash 16056364, now seen corresponding path program 22 times [2021-05-21 20:50:58,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:58,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579500829] [2021-05-21 20:50:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:58,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:58,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579500829] [2021-05-21 20:50:58,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579500829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:58,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333317432] [2021-05-21 20:50:58,856 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 [2021-05-21 20:50:58,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:50:58,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:58,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:58,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333317432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:58,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:58,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:50:58,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891941937] [2021-05-21 20:50:58,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:50:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:50:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:50:58,923 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) [2021-05-21 20:50:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:59,003 INFO L93 Difference]: Finished difference Result 539 states and 1596 transitions. [2021-05-21 20:50:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:59,004 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 [2021-05-21 20:50:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:59,005 INFO L225 Difference]: With dead ends: 539 [2021-05-21 20:50:59,005 INFO L226 Difference]: Without dead ends: 539 [2021-05-21 20:50:59,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-21 20:50:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 259. [2021-05-21 20:50:59,009 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) [2021-05-21 20:50:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 782 transitions. [2021-05-21 20:50:59,010 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 782 transitions. Word has length 19 [2021-05-21 20:50:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:59,010 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 782 transitions. [2021-05-21 20:50:59,010 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) [2021-05-21 20:50:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 782 transitions. [2021-05-21 20:50:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:59,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:59,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:59,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:50:59,226 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash -366317049, now seen corresponding path program 23 times [2021-05-21 20:50:59,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:59,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635170489] [2021-05-21 20:50:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:59,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635170489] [2021-05-21 20:50:59,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635170489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585800517] [2021-05-21 20:50:59,256 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 [2021-05-21 20:50:59,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:59,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:59,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:59,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585800517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:59,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:59,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:50:59,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472085704] [2021-05-21 20:50:59,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:50:59,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:50:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:50:59,342 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) [2021-05-21 20:50:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:59,422 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-05-21 20:50:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:59,422 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 [2021-05-21 20:50:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:59,423 INFO L225 Difference]: With dead ends: 482 [2021-05-21 20:50:59,423 INFO L226 Difference]: Without dead ends: 474 [2021-05-21 20:50:59,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:50:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-21 20:50:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 275. [2021-05-21 20:50:59,426 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) [2021-05-21 20:50:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-05-21 20:50:59,427 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-05-21 20:50:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:59,427 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-05-21 20:50:59,427 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) [2021-05-21 20:50:59,427 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-05-21 20:50:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:59,427 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:59,427 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:50:59,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-21 20:50:59,628 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:50:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:50:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash -334370096, now seen corresponding path program 23 times [2021-05-21 20:50:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:50:59,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657194432] [2021-05-21 20:50:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:50:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:50:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:59,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:50:59,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657194432] [2021-05-21 20:50:59,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657194432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:59,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27145927] [2021-05-21 20:50:59,657 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 [2021-05-21 20:50:59,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:50:59,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:50:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:50:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:50:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:50:59,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27145927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:50:59,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:50:59,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:50:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135282683] [2021-05-21 20:50:59,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:50:59,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:50:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:50:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:50:59,728 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) [2021-05-21 20:50:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:50:59,820 INFO L93 Difference]: Finished difference Result 532 states and 1566 transitions. [2021-05-21 20:50:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:50:59,821 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 [2021-05-21 20:50:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:50:59,821 INFO L225 Difference]: With dead ends: 532 [2021-05-21 20:50:59,821 INFO L226 Difference]: Without dead ends: 532 [2021-05-21 20:50:59,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:50:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-21 20:50:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 275. [2021-05-21 20:50:59,825 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) [2021-05-21 20:50:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-05-21 20:50:59,825 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-05-21 20:50:59,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:50:59,825 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-05-21 20:50:59,826 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) [2021-05-21 20:50:59,826 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-05-21 20:50:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:50:59,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:50:59,826 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:00,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:00,041 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2088629120, now seen corresponding path program 24 times [2021-05-21 20:51:00,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:00,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717917276] [2021-05-21 20:51:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:00,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:00,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717917276] [2021-05-21 20:51:00,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717917276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:00,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329514021] [2021-05-21 20:51:00,068 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 [2021-05-21 20:51:00,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:00,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:00,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:00,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329514021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:00,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:00,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:00,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678697897] [2021-05-21 20:51:00,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:00,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:00,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:00,140 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) [2021-05-21 20:51:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:00,220 INFO L93 Difference]: Finished difference Result 478 states and 1416 transitions. [2021-05-21 20:51:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:00,221 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 [2021-05-21 20:51:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:00,221 INFO L225 Difference]: With dead ends: 478 [2021-05-21 20:51:00,221 INFO L226 Difference]: Without dead ends: 469 [2021-05-21 20:51:00,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-21 20:51:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 275. [2021-05-21 20:51:00,225 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) [2021-05-21 20:51:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 834 transitions. [2021-05-21 20:51:00,226 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 834 transitions. Word has length 19 [2021-05-21 20:51:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:00,226 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 834 transitions. [2021-05-21 20:51:00,226 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) [2021-05-21 20:51:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 834 transitions. [2021-05-21 20:51:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:00,226 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:00,226 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:00,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:00,427 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 112967627, now seen corresponding path program 24 times [2021-05-21 20:51:00,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:00,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699736891] [2021-05-21 20:51:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:00,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699736891] [2021-05-21 20:51:00,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699736891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554168315] [2021-05-21 20:51:00,459 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 [2021-05-21 20:51:00,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:00,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:00,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:00,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:00,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554168315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:00,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:00,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:00,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692301559] [2021-05-21 20:51:00,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:00,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:00,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:00,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:00,551 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) [2021-05-21 20:51:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:00,644 INFO L93 Difference]: Finished difference Result 445 states and 1322 transitions. [2021-05-21 20:51:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:00,644 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 [2021-05-21 20:51:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:00,644 INFO L225 Difference]: With dead ends: 445 [2021-05-21 20:51:00,645 INFO L226 Difference]: Without dead ends: 445 [2021-05-21 20:51:00,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-05-21 20:51:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 255. [2021-05-21 20:51:00,647 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) [2021-05-21 20:51:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-05-21 20:51:00,648 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-05-21 20:51:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:00,648 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-05-21 20:51:00,648 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) [2021-05-21 20:51:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-05-21 20:51:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:00,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:00,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:00,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-05-21 20:51:00,870 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash 510647071, now seen corresponding path program 25 times [2021-05-21 20:51:00,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:00,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796152934] [2021-05-21 20:51:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:00,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796152934] [2021-05-21 20:51:00,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796152934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:00,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:00,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:00,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214597819] [2021-05-21 20:51:00,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:00,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:00,898 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) [2021-05-21 20:51:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:01,002 INFO L93 Difference]: Finished difference Result 454 states and 1310 transitions. [2021-05-21 20:51:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:01,003 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 [2021-05-21 20:51:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:01,003 INFO L225 Difference]: With dead ends: 454 [2021-05-21 20:51:01,003 INFO L226 Difference]: Without dead ends: 446 [2021-05-21 20:51:01,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-21 20:51:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 275. [2021-05-21 20:51:01,006 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) [2021-05-21 20:51:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-05-21 20:51:01,007 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-05-21 20:51:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:01,007 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-05-21 20:51:01,007 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) [2021-05-21 20:51:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-05-21 20:51:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:01,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:01,007 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:01,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2021-05-21 20:51:01,007 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash 891384711, now seen corresponding path program 26 times [2021-05-21 20:51:01,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:01,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035210217] [2021-05-21 20:51:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:01,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035210217] [2021-05-21 20:51:01,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035210217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:01,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:01,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:01,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978563470] [2021-05-21 20:51:01,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:01,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:01,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:01,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:01,061 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) [2021-05-21 20:51:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:01,164 INFO L93 Difference]: Finished difference Result 460 states and 1325 transitions. [2021-05-21 20:51:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:01,164 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 [2021-05-21 20:51:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:01,165 INFO L225 Difference]: With dead ends: 460 [2021-05-21 20:51:01,165 INFO L226 Difference]: Without dead ends: 452 [2021-05-21 20:51:01,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-21 20:51:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 279. [2021-05-21 20:51:01,168 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) [2021-05-21 20:51:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 845 transitions. [2021-05-21 20:51:01,168 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 845 transitions. Word has length 19 [2021-05-21 20:51:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:01,169 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 845 transitions. [2021-05-21 20:51:01,169 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) [2021-05-21 20:51:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 845 transitions. [2021-05-21 20:51:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:01,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:01,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:01,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2021-05-21 20:51:01,169 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1851957296, now seen corresponding path program 25 times [2021-05-21 20:51:01,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:01,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780885912] [2021-05-21 20:51:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:01,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780885912] [2021-05-21 20:51:01,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780885912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64177423] [2021-05-21 20:51:01,205 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 [2021-05-21 20:51:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:01,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:01,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64177423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:01,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:01,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:01,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635715312] [2021-05-21 20:51:01,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:01,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:01,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:01,310 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) [2021-05-21 20:51:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:01,432 INFO L93 Difference]: Finished difference Result 519 states and 1519 transitions. [2021-05-21 20:51:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:01,433 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 [2021-05-21 20:51:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:01,433 INFO L225 Difference]: With dead ends: 519 [2021-05-21 20:51:01,433 INFO L226 Difference]: Without dead ends: 519 [2021-05-21 20:51:01,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-05-21 20:51:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 285. [2021-05-21 20:51:01,438 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) [2021-05-21 20:51:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 872 transitions. [2021-05-21 20:51:01,439 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 872 transitions. Word has length 19 [2021-05-21 20:51:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:01,439 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 872 transitions. [2021-05-21 20:51:01,439 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) [2021-05-21 20:51:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 872 transitions. [2021-05-21 20:51:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:01,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:01,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:01,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:01,663 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash -921796120, now seen corresponding path program 26 times [2021-05-21 20:51:01,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:01,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568846807] [2021-05-21 20:51:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:01,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:01,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568846807] [2021-05-21 20:51:01,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568846807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:01,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956474341] [2021-05-21 20:51:01,691 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 [2021-05-21 20:51:01,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:01,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:01,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:01,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956474341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:01,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:01,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:01,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484910264] [2021-05-21 20:51:01,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:01,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:01,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:01,786 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) [2021-05-21 20:51:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:01,882 INFO L93 Difference]: Finished difference Result 501 states and 1450 transitions. [2021-05-21 20:51:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:01,882 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 [2021-05-21 20:51:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:01,883 INFO L225 Difference]: With dead ends: 501 [2021-05-21 20:51:01,883 INFO L226 Difference]: Without dead ends: 495 [2021-05-21 20:51:01,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-21 20:51:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 284. [2021-05-21 20:51:01,886 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) [2021-05-21 20:51:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 867 transitions. [2021-05-21 20:51:01,886 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 867 transitions. Word has length 19 [2021-05-21 20:51:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:01,886 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 867 transitions. [2021-05-21 20:51:01,886 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) [2021-05-21 20:51:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 867 transitions. [2021-05-21 20:51:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:01,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:01,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:02,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-05-21 20:51:02,087 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash 306512931, now seen corresponding path program 27 times [2021-05-21 20:51:02,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:02,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753049707] [2021-05-21 20:51:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:02,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753049707] [2021-05-21 20:51:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753049707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72284249] [2021-05-21 20:51:02,117 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 [2021-05-21 20:51:02,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:02,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:02,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72284249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:02,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:02,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:02,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079141573] [2021-05-21 20:51:02,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:02,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:02,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:02,215 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) [2021-05-21 20:51:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:02,308 INFO L93 Difference]: Finished difference Result 478 states and 1372 transitions. [2021-05-21 20:51:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:02,308 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 [2021-05-21 20:51:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:02,309 INFO L225 Difference]: With dead ends: 478 [2021-05-21 20:51:02,309 INFO L226 Difference]: Without dead ends: 470 [2021-05-21 20:51:02,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-21 20:51:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 284. [2021-05-21 20:51:02,312 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) [2021-05-21 20:51:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 870 transitions. [2021-05-21 20:51:02,313 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 870 transitions. Word has length 19 [2021-05-21 20:51:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:02,313 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 870 transitions. [2021-05-21 20:51:02,313 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) [2021-05-21 20:51:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 870 transitions. [2021-05-21 20:51:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:02,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:02,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:02,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:02,514 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1651557640, now seen corresponding path program 27 times [2021-05-21 20:51:02,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:02,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247349132] [2021-05-21 20:51:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:02,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:02,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247349132] [2021-05-21 20:51:02,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247349132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:02,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622329230] [2021-05-21 20:51:02,544 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 [2021-05-21 20:51:02,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:51:02,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:02,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622329230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:02,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:02,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:02,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539568707] [2021-05-21 20:51:02,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:02,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:02,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:02,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:02,629 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) [2021-05-21 20:51:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:02,707 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-05-21 20:51:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:02,707 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 [2021-05-21 20:51:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:02,708 INFO L225 Difference]: With dead ends: 498 [2021-05-21 20:51:02,708 INFO L226 Difference]: Without dead ends: 498 [2021-05-21 20:51:02,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-21 20:51:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 275. [2021-05-21 20:51:02,711 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) [2021-05-21 20:51:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 840 transitions. [2021-05-21 20:51:02,711 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 840 transitions. Word has length 19 [2021-05-21 20:51:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:02,711 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 840 transitions. [2021-05-21 20:51:02,711 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) [2021-05-21 20:51:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 840 transitions. [2021-05-21 20:51:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:02,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:02,712 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-05-21 20:51:02,912 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1732798312, now seen corresponding path program 28 times [2021-05-21 20:51:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91025418] [2021-05-21 20:51:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:02,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:02,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91025418] [2021-05-21 20:51:02,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91025418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:02,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244458757] [2021-05-21 20:51:02,940 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 [2021-05-21 20:51:02,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:02,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:03,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244458757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:03,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:03,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:03,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362850891] [2021-05-21 20:51:03,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:03,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:03,023 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) [2021-05-21 20:51:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:03,121 INFO L93 Difference]: Finished difference Result 453 states and 1315 transitions. [2021-05-21 20:51:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:03,121 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 [2021-05-21 20:51:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:03,122 INFO L225 Difference]: With dead ends: 453 [2021-05-21 20:51:03,122 INFO L226 Difference]: Without dead ends: 444 [2021-05-21 20:51:03,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-21 20:51:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 275. [2021-05-21 20:51:03,125 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) [2021-05-21 20:51:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-05-21 20:51:03,125 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-05-21 20:51:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:03,126 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-05-21 20:51:03,126 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) [2021-05-21 20:51:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-05-21 20:51:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:03,126 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:03,126 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:03,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:03,326 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:03,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:03,327 INFO L82 PathProgramCache]: Analyzing trace with hash 586507491, now seen corresponding path program 28 times [2021-05-21 20:51:03,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:03,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809302982] [2021-05-21 20:51:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:03,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:03,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809302982] [2021-05-21 20:51:03,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809302982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:03,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981196519] [2021-05-21 20:51:03,359 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 [2021-05-21 20:51:03,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:03,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:03,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:03,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:03,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981196519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:03,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:03,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:03,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260368825] [2021-05-21 20:51:03,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:03,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:03,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:03,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:03,448 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) [2021-05-21 20:51:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:03,552 INFO L93 Difference]: Finished difference Result 450 states and 1322 transitions. [2021-05-21 20:51:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:03,552 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 [2021-05-21 20:51:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:03,553 INFO L225 Difference]: With dead ends: 450 [2021-05-21 20:51:03,553 INFO L226 Difference]: Without dead ends: 450 [2021-05-21 20:51:03,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-21 20:51:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 271. [2021-05-21 20:51:03,556 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) [2021-05-21 20:51:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-05-21 20:51:03,556 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-05-21 20:51:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:03,556 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-05-21 20:51:03,556 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) [2021-05-21 20:51:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-05-21 20:51:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:03,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:03,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:03,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-05-21 20:51:03,757 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1108954472, now seen corresponding path program 29 times [2021-05-21 20:51:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:03,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017354683] [2021-05-21 20:51:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:03,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:03,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017354683] [2021-05-21 20:51:03,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017354683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:03,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:03,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:03,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485715667] [2021-05-21 20:51:03,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:03,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:03,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:03,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:03,794 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) [2021-05-21 20:51:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:03,871 INFO L93 Difference]: Finished difference Result 424 states and 1226 transitions. [2021-05-21 20:51:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:03,871 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 [2021-05-21 20:51:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:03,872 INFO L225 Difference]: With dead ends: 424 [2021-05-21 20:51:03,872 INFO L226 Difference]: Without dead ends: 418 [2021-05-21 20:51:03,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-21 20:51:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 281. [2021-05-21 20:51:03,875 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) [2021-05-21 20:51:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 849 transitions. [2021-05-21 20:51:03,875 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 849 transitions. Word has length 19 [2021-05-21 20:51:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:03,875 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 849 transitions. [2021-05-21 20:51:03,875 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) [2021-05-21 20:51:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 849 transitions. [2021-05-21 20:51:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:03,875 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:03,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:03,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2021-05-21 20:51:03,876 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2084098672, now seen corresponding path program 30 times [2021-05-21 20:51:03,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:03,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036084654] [2021-05-21 20:51:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:03,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:03,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036084654] [2021-05-21 20:51:03,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036084654] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:03,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:03,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:03,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961679123] [2021-05-21 20:51:03,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:03,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:03,903 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) [2021-05-21 20:51:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:03,978 INFO L93 Difference]: Finished difference Result 388 states and 1143 transitions. [2021-05-21 20:51:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:03,978 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 [2021-05-21 20:51:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:03,979 INFO L225 Difference]: With dead ends: 388 [2021-05-21 20:51:03,979 INFO L226 Difference]: Without dead ends: 377 [2021-05-21 20:51:03,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-21 20:51:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 271. [2021-05-21 20:51:03,981 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) [2021-05-21 20:51:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 823 transitions. [2021-05-21 20:51:03,982 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 823 transitions. Word has length 19 [2021-05-21 20:51:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:03,982 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 823 transitions. [2021-05-21 20:51:03,982 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) [2021-05-21 20:51:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 823 transitions. [2021-05-21 20:51:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:03,982 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:03,982 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:03,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2021-05-21 20:51:03,982 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash -384942261, now seen corresponding path program 29 times [2021-05-21 20:51:03,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:03,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761571625] [2021-05-21 20:51:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:04,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:04,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761571625] [2021-05-21 20:51:04,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761571625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:04,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:04,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:04,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207154398] [2021-05-21 20:51:04,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:04,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:04,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:04,031 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) [2021-05-21 20:51:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:04,133 INFO L93 Difference]: Finished difference Result 401 states and 1166 transitions. [2021-05-21 20:51:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:04,133 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 [2021-05-21 20:51:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:04,133 INFO L225 Difference]: With dead ends: 401 [2021-05-21 20:51:04,134 INFO L226 Difference]: Without dead ends: 395 [2021-05-21 20:51:04,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-21 20:51:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 277. [2021-05-21 20:51:04,136 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) [2021-05-21 20:51:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 837 transitions. [2021-05-21 20:51:04,137 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 837 transitions. Word has length 19 [2021-05-21 20:51:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:04,137 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 837 transitions. [2021-05-21 20:51:04,137 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) [2021-05-21 20:51:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 837 transitions. [2021-05-21 20:51:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:04,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:04,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:04,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2021-05-21 20:51:04,137 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:04,138 INFO L82 PathProgramCache]: Analyzing trace with hash -114432569, now seen corresponding path program 30 times [2021-05-21 20:51:04,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:04,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826593096] [2021-05-21 20:51:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:04,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:04,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826593096] [2021-05-21 20:51:04,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826593096] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:04,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:04,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:04,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576100380] [2021-05-21 20:51:04,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:04,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:04,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:04,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:04,170 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) [2021-05-21 20:51:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:04,278 INFO L93 Difference]: Finished difference Result 379 states and 1129 transitions. [2021-05-21 20:51:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:04,279 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 [2021-05-21 20:51:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:04,279 INFO L225 Difference]: With dead ends: 379 [2021-05-21 20:51:04,279 INFO L226 Difference]: Without dead ends: 379 [2021-05-21 20:51:04,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-21 20:51:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 255. [2021-05-21 20:51:04,282 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) [2021-05-21 20:51:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-05-21 20:51:04,282 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-05-21 20:51:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:04,282 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-05-21 20:51:04,282 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) [2021-05-21 20:51:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-05-21 20:51:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:04,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:04,283 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:04,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2021-05-21 20:51:04,283 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:04,283 INFO L82 PathProgramCache]: Analyzing trace with hash 401252280, now seen corresponding path program 31 times [2021-05-21 20:51:04,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:04,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535499058] [2021-05-21 20:51:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:04,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535499058] [2021-05-21 20:51:04,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535499058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406042872] [2021-05-21 20:51:04,316 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 [2021-05-21 20:51:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:04,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:04,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406042872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:04,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:04,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:04,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096398222] [2021-05-21 20:51:04,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:04,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:04,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:04,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:04,398 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) [2021-05-21 20:51:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:04,472 INFO L93 Difference]: Finished difference Result 485 states and 1377 transitions. [2021-05-21 20:51:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:04,473 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 [2021-05-21 20:51:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:04,473 INFO L225 Difference]: With dead ends: 485 [2021-05-21 20:51:04,473 INFO L226 Difference]: Without dead ends: 461 [2021-05-21 20:51:04,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-21 20:51:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 255. [2021-05-21 20:51:04,476 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) [2021-05-21 20:51:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-05-21 20:51:04,477 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-05-21 20:51:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:04,477 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-05-21 20:51:04,477 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) [2021-05-21 20:51:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-05-21 20:51:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:04,477 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:04,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:04,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:04,678 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash 317204657, now seen corresponding path program 31 times [2021-05-21 20:51:04,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:04,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052843526] [2021-05-21 20:51:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:04,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052843526] [2021-05-21 20:51:04,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052843526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758992617] [2021-05-21 20:51:04,705 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 [2021-05-21 20:51:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:04,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758992617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:04,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:04,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:51:04,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707144401] [2021-05-21 20:51:04,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:51:04,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:51:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:04,769 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) [2021-05-21 20:51:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:04,853 INFO L93 Difference]: Finished difference Result 428 states and 1251 transitions. [2021-05-21 20:51:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:04,853 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 [2021-05-21 20:51:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:04,854 INFO L225 Difference]: With dead ends: 428 [2021-05-21 20:51:04,854 INFO L226 Difference]: Without dead ends: 428 [2021-05-21 20:51:04,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-21 20:51:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 255. [2021-05-21 20:51:04,856 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) [2021-05-21 20:51:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-05-21 20:51:04,857 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-05-21 20:51:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:04,857 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-05-21 20:51:04,857 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) [2021-05-21 20:51:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-05-21 20:51:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:04,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:04,857 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:05,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-05-21 20:51:05,061 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash -27612327, now seen corresponding path program 32 times [2021-05-21 20:51:05,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:05,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400917657] [2021-05-21 20:51:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:05,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400917657] [2021-05-21 20:51:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400917657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335096961] [2021-05-21 20:51:05,086 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 [2021-05-21 20:51:05,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:05,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335096961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:05,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:05,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:05,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841428040] [2021-05-21 20:51:05,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:05,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:05,157 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) [2021-05-21 20:51:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:05,230 INFO L93 Difference]: Finished difference Result 425 states and 1238 transitions. [2021-05-21 20:51:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:05,230 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 [2021-05-21 20:51:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:05,231 INFO L225 Difference]: With dead ends: 425 [2021-05-21 20:51:05,231 INFO L226 Difference]: Without dead ends: 417 [2021-05-21 20:51:05,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-21 20:51:05,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 271. [2021-05-21 20:51:05,234 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) [2021-05-21 20:51:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-05-21 20:51:05,234 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-05-21 20:51:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:05,234 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-05-21 20:51:05,234 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) [2021-05-21 20:51:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-05-21 20:51:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:05,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:05,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:05,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-21 20:51:05,435 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:05,435 INFO L82 PathProgramCache]: Analyzing trace with hash 4334626, now seen corresponding path program 32 times [2021-05-21 20:51:05,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:05,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474955882] [2021-05-21 20:51:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:05,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:05,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474955882] [2021-05-21 20:51:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474955882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:05,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581883953] [2021-05-21 20:51:05,468 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 [2021-05-21 20:51:05,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:05,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:05,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:05,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581883953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:05,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:05,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380049035] [2021-05-21 20:51:05,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:05,556 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) [2021-05-21 20:51:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:05,643 INFO L93 Difference]: Finished difference Result 489 states and 1412 transitions. [2021-05-21 20:51:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:05,643 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 [2021-05-21 20:51:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:05,644 INFO L225 Difference]: With dead ends: 489 [2021-05-21 20:51:05,644 INFO L226 Difference]: Without dead ends: 489 [2021-05-21 20:51:05,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-21 20:51:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-05-21 20:51:05,647 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) [2021-05-21 20:51:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-05-21 20:51:05,647 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-05-21 20:51:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:05,647 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-05-21 20:51:05,647 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) [2021-05-21 20:51:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-05-21 20:51:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:05,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:05,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:05,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:05,848 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1867633454, now seen corresponding path program 33 times [2021-05-21 20:51:05,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:05,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559937113] [2021-05-21 20:51:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:05,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:05,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559937113] [2021-05-21 20:51:05,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559937113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:05,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363040846] [2021-05-21 20:51:05,878 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 [2021-05-21 20:51:05,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:05,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:05,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:05,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363040846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:05,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:05,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:05,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058333741] [2021-05-21 20:51:05,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:05,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:05,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:05,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:05,964 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) [2021-05-21 20:51:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:06,063 INFO L93 Difference]: Finished difference Result 498 states and 1425 transitions. [2021-05-21 20:51:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:06,063 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 [2021-05-21 20:51:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:06,064 INFO L225 Difference]: With dead ends: 498 [2021-05-21 20:51:06,064 INFO L226 Difference]: Without dead ends: 489 [2021-05-21 20:51:06,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-21 20:51:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-05-21 20:51:06,068 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) [2021-05-21 20:51:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 815 transitions. [2021-05-21 20:51:06,068 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 815 transitions. Word has length 19 [2021-05-21 20:51:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:06,068 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 815 transitions. [2021-05-21 20:51:06,068 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) [2021-05-21 20:51:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 815 transitions. [2021-05-21 20:51:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:06,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:06,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:06,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-05-21 20:51:06,269 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 451672349, now seen corresponding path program 33 times [2021-05-21 20:51:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:06,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630774109] [2021-05-21 20:51:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:06,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:06,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630774109] [2021-05-21 20:51:06,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630774109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:06,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086982953] [2021-05-21 20:51:06,299 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 [2021-05-21 20:51:06,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:06,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:06,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:06,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:06,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086982953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:06,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:06,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:06,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369119897] [2021-05-21 20:51:06,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:06,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:06,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:06,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:06,374 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) [2021-05-21 20:51:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:06,454 INFO L93 Difference]: Finished difference Result 447 states and 1310 transitions. [2021-05-21 20:51:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:06,454 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 [2021-05-21 20:51:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:06,455 INFO L225 Difference]: With dead ends: 447 [2021-05-21 20:51:06,455 INFO L226 Difference]: Without dead ends: 447 [2021-05-21 20:51:06,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-21 20:51:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 260. [2021-05-21 20:51:06,458 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) [2021-05-21 20:51:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 782 transitions. [2021-05-21 20:51:06,458 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 782 transitions. Word has length 19 [2021-05-21 20:51:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:06,458 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 782 transitions. [2021-05-21 20:51:06,458 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) [2021-05-21 20:51:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 782 transitions. [2021-05-21 20:51:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:06,459 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:06,459 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:06,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:06,659 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash 256701904, now seen corresponding path program 34 times [2021-05-21 20:51:06,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:06,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288060048] [2021-05-21 20:51:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:06,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:06,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288060048] [2021-05-21 20:51:06,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288060048] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:06,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:06,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:06,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195426651] [2021-05-21 20:51:06,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:06,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:06,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:06,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:06,685 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) [2021-05-21 20:51:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:06,752 INFO L93 Difference]: Finished difference Result 556 states and 1559 transitions. [2021-05-21 20:51:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:06,753 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 [2021-05-21 20:51:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:06,753 INFO L225 Difference]: With dead ends: 556 [2021-05-21 20:51:06,753 INFO L226 Difference]: Without dead ends: 532 [2021-05-21 20:51:06,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-21 20:51:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 264. [2021-05-21 20:51:06,756 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) [2021-05-21 20:51:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-05-21 20:51:06,757 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 19 [2021-05-21 20:51:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:06,757 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-05-21 20:51:06,757 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) [2021-05-21 20:51:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-05-21 20:51:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:06,757 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:06,757 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:06,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2021-05-21 20:51:06,757 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2084615198, now seen corresponding path program 35 times [2021-05-21 20:51:06,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:06,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480067445] [2021-05-21 20:51:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:06,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:06,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480067445] [2021-05-21 20:51:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480067445] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:06,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:06,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:06,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591641076] [2021-05-21 20:51:06,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:06,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:06,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:06,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:06,785 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) [2021-05-21 20:51:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:06,857 INFO L93 Difference]: Finished difference Result 540 states and 1513 transitions. [2021-05-21 20:51:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:06,857 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 [2021-05-21 20:51:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:06,858 INFO L225 Difference]: With dead ends: 540 [2021-05-21 20:51:06,858 INFO L226 Difference]: Without dead ends: 534 [2021-05-21 20:51:06,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:06,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-21 20:51:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 274. [2021-05-21 20:51:06,861 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) [2021-05-21 20:51:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 813 transitions. [2021-05-21 20:51:06,862 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 813 transitions. Word has length 19 [2021-05-21 20:51:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:06,862 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 813 transitions. [2021-05-21 20:51:06,862 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) [2021-05-21 20:51:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 813 transitions. [2021-05-21 20:51:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:06,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:06,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:06,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2021-05-21 20:51:06,862 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash -180498166, now seen corresponding path program 36 times [2021-05-21 20:51:06,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:06,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028263682] [2021-05-21 20:51:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:06,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:06,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028263682] [2021-05-21 20:51:06,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028263682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:06,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:06,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:06,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095014741] [2021-05-21 20:51:06,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:06,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:06,892 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) [2021-05-21 20:51:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:06,969 INFO L93 Difference]: Finished difference Result 504 states and 1430 transitions. [2021-05-21 20:51:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:06,969 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 [2021-05-21 20:51:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:06,970 INFO L225 Difference]: With dead ends: 504 [2021-05-21 20:51:06,970 INFO L226 Difference]: Without dead ends: 489 [2021-05-21 20:51:06,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-21 20:51:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 260. [2021-05-21 20:51:06,973 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) [2021-05-21 20:51:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-05-21 20:51:06,973 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-05-21 20:51:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:06,973 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-05-21 20:51:06,973 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) [2021-05-21 20:51:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-05-21 20:51:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:06,974 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:06,974 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:06,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2021-05-21 20:51:06,974 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash -136390839, now seen corresponding path program 34 times [2021-05-21 20:51:06,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:06,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454307496] [2021-05-21 20:51:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:07,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:07,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454307496] [2021-05-21 20:51:07,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454307496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:07,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428364247] [2021-05-21 20:51:07,019 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 [2021-05-21 20:51:07,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:07,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428364247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:07,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:07,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:51:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497662588] [2021-05-21 20:51:07,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:51:07,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:07,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:51:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:07,092 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) [2021-05-21 20:51:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:07,181 INFO L93 Difference]: Finished difference Result 588 states and 1723 transitions. [2021-05-21 20:51:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:07,181 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 [2021-05-21 20:51:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:07,182 INFO L225 Difference]: With dead ends: 588 [2021-05-21 20:51:07,182 INFO L226 Difference]: Without dead ends: 588 [2021-05-21 20:51:07,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-21 20:51:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 266. [2021-05-21 20:51:07,185 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) [2021-05-21 20:51:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 798 transitions. [2021-05-21 20:51:07,185 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 798 transitions. Word has length 19 [2021-05-21 20:51:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:07,185 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 798 transitions. [2021-05-21 20:51:07,185 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) [2021-05-21 20:51:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 798 transitions. [2021-05-21 20:51:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:07,186 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:07,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:07,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-05-21 20:51:07,386 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:07,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1036563747, now seen corresponding path program 35 times [2021-05-21 20:51:07,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:07,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534751177] [2021-05-21 20:51:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:07,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:07,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534751177] [2021-05-21 20:51:07,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534751177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:07,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265461476] [2021-05-21 20:51:07,412 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 [2021-05-21 20:51:07,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:07,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:07,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265461476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:07,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:07,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:07,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144190447] [2021-05-21 20:51:07,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:07,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:07,484 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) [2021-05-21 20:51:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:07,561 INFO L93 Difference]: Finished difference Result 527 states and 1532 transitions. [2021-05-21 20:51:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:07,561 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 [2021-05-21 20:51:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:07,562 INFO L225 Difference]: With dead ends: 527 [2021-05-21 20:51:07,562 INFO L226 Difference]: Without dead ends: 521 [2021-05-21 20:51:07,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-21 20:51:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 278. [2021-05-21 20:51:07,566 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) [2021-05-21 20:51:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 837 transitions. [2021-05-21 20:51:07,566 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 837 transitions. Word has length 19 [2021-05-21 20:51:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:07,566 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 837 transitions. [2021-05-21 20:51:07,566 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) [2021-05-21 20:51:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 837 transitions. [2021-05-21 20:51:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:07,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:07,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:07,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-05-21 20:51:07,781 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2043043929, now seen corresponding path program 36 times [2021-05-21 20:51:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:07,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179689805] [2021-05-21 20:51:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:07,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:07,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179689805] [2021-05-21 20:51:07,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179689805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:07,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663928845] [2021-05-21 20:51:07,810 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 [2021-05-21 20:51:07,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:07,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663928845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:07,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:07,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:07,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025172782] [2021-05-21 20:51:07,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:07,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:07,878 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) [2021-05-21 20:51:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:07,959 INFO L93 Difference]: Finished difference Result 505 states and 1485 transitions. [2021-05-21 20:51:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:07,959 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 [2021-05-21 20:51:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:07,960 INFO L225 Difference]: With dead ends: 505 [2021-05-21 20:51:07,960 INFO L226 Difference]: Without dead ends: 505 [2021-05-21 20:51:07,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-21 20:51:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-05-21 20:51:07,962 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) [2021-05-21 20:51:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-05-21 20:51:07,963 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-05-21 20:51:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:07,963 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-05-21 20:51:07,963 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) [2021-05-21 20:51:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-05-21 20:51:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:07,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:07,963 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:08,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-05-21 20:51:08,164 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash -695873807, now seen corresponding path program 37 times [2021-05-21 20:51:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:08,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539255652] [2021-05-21 20:51:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:08,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:08,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539255652] [2021-05-21 20:51:08,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539255652] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:08,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:08,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:08,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831939674] [2021-05-21 20:51:08,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:08,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:08,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:08,191 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) [2021-05-21 20:51:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:08,272 INFO L93 Difference]: Finished difference Result 507 states and 1464 transitions. [2021-05-21 20:51:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:08,272 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 [2021-05-21 20:51:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:08,273 INFO L225 Difference]: With dead ends: 507 [2021-05-21 20:51:08,273 INFO L226 Difference]: Without dead ends: 499 [2021-05-21 20:51:08,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-05-21 20:51:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 272. [2021-05-21 20:51:08,276 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) [2021-05-21 20:51:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-21 20:51:08,276 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-21 20:51:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:08,276 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-21 20:51:08,276 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) [2021-05-21 20:51:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-21 20:51:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:08,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:08,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:08,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2021-05-21 20:51:08,277 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -315136167, now seen corresponding path program 38 times [2021-05-21 20:51:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415190886] [2021-05-21 20:51:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:08,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415190886] [2021-05-21 20:51:08,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415190886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:08,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:08,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:08,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889260333] [2021-05-21 20:51:08,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:08,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:08,303 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) [2021-05-21 20:51:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:08,382 INFO L93 Difference]: Finished difference Result 497 states and 1439 transitions. [2021-05-21 20:51:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:08,382 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 [2021-05-21 20:51:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:08,383 INFO L225 Difference]: With dead ends: 497 [2021-05-21 20:51:08,383 INFO L226 Difference]: Without dead ends: 489 [2021-05-21 20:51:08,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-21 20:51:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 276. [2021-05-21 20:51:08,386 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) [2021-05-21 20:51:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-05-21 20:51:08,386 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-05-21 20:51:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:08,386 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-05-21 20:51:08,386 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) [2021-05-21 20:51:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-05-21 20:51:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:08,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:08,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:08,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2021-05-21 20:51:08,387 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1236489122, now seen corresponding path program 37 times [2021-05-21 20:51:08,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:08,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55420054] [2021-05-21 20:51:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:08,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:08,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55420054] [2021-05-21 20:51:08,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55420054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:08,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330985108] [2021-05-21 20:51:08,421 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 [2021-05-21 20:51:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:08,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:08,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330985108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:08,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:08,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111874664] [2021-05-21 20:51:08,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:08,509 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) [2021-05-21 20:51:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:08,600 INFO L93 Difference]: Finished difference Result 591 states and 1709 transitions. [2021-05-21 20:51:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:08,600 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 [2021-05-21 20:51:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:08,601 INFO L225 Difference]: With dead ends: 591 [2021-05-21 20:51:08,601 INFO L226 Difference]: Without dead ends: 591 [2021-05-21 20:51:08,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-21 20:51:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 282. [2021-05-21 20:51:08,605 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) [2021-05-21 20:51:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 862 transitions. [2021-05-21 20:51:08,605 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 862 transitions. Word has length 19 [2021-05-21 20:51:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:08,605 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 862 transitions. [2021-05-21 20:51:08,605 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) [2021-05-21 20:51:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 862 transitions. [2021-05-21 20:51:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:08,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:08,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:08,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-05-21 20:51:08,806 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2128316998, now seen corresponding path program 38 times [2021-05-21 20:51:08,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:08,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47132921] [2021-05-21 20:51:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:08,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:08,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47132921] [2021-05-21 20:51:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47132921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:08,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909426713] [2021-05-21 20:51:08,836 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 [2021-05-21 20:51:08,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:08,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:08,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909426713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:08,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:08,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697479584] [2021-05-21 20:51:08,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:08,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:08,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:08,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:08,923 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) [2021-05-21 20:51:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:09,014 INFO L93 Difference]: Finished difference Result 573 states and 1640 transitions. [2021-05-21 20:51:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:09,014 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 [2021-05-21 20:51:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:09,015 INFO L225 Difference]: With dead ends: 573 [2021-05-21 20:51:09,015 INFO L226 Difference]: Without dead ends: 567 [2021-05-21 20:51:09,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-21 20:51:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 281. [2021-05-21 20:51:09,018 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) [2021-05-21 20:51:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-05-21 20:51:09,019 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-05-21 20:51:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:09,019 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-05-21 20:51:09,019 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) [2021-05-21 20:51:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-05-21 20:51:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:09,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:09,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:09,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:09,240 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash -900007947, now seen corresponding path program 39 times [2021-05-21 20:51:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:09,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401756460] [2021-05-21 20:51:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:09,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:09,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401756460] [2021-05-21 20:51:09,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401756460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:09,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027589738] [2021-05-21 20:51:09,268 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 [2021-05-21 20:51:09,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:09,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:09,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:09,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027589738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:09,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:09,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:09,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093284520] [2021-05-21 20:51:09,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:09,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:09,345 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) [2021-05-21 20:51:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:09,436 INFO L93 Difference]: Finished difference Result 558 states and 1599 transitions. [2021-05-21 20:51:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:09,436 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 [2021-05-21 20:51:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:09,437 INFO L225 Difference]: With dead ends: 558 [2021-05-21 20:51:09,437 INFO L226 Difference]: Without dead ends: 550 [2021-05-21 20:51:09,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-21 20:51:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 281. [2021-05-21 20:51:09,446 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) [2021-05-21 20:51:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-05-21 20:51:09,447 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-05-21 20:51:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:09,447 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-05-21 20:51:09,447 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) [2021-05-21 20:51:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-05-21 20:51:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:09,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:09,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:09,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:09,648 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1436888778, now seen corresponding path program 39 times [2021-05-21 20:51:09,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:09,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122573948] [2021-05-21 20:51:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:09,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:09,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122573948] [2021-05-21 20:51:09,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122573948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:09,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146157114] [2021-05-21 20:51:09,683 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 [2021-05-21 20:51:09,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:51:09,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:09,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146157114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:09,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:09,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:09,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878507099] [2021-05-21 20:51:09,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:09,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:09,774 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) [2021-05-21 20:51:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:09,873 INFO L93 Difference]: Finished difference Result 621 states and 1765 transitions. [2021-05-21 20:51:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:09,873 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 [2021-05-21 20:51:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:09,874 INFO L225 Difference]: With dead ends: 621 [2021-05-21 20:51:09,874 INFO L226 Difference]: Without dead ends: 621 [2021-05-21 20:51:09,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-05-21 20:51:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 272. [2021-05-21 20:51:09,878 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) [2021-05-21 20:51:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-05-21 20:51:09,879 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-05-21 20:51:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:09,879 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-05-21 20:51:09,879 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) [2021-05-21 20:51:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-05-21 20:51:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:09,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:09,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:10,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-05-21 20:51:10,093 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1355648106, now seen corresponding path program 40 times [2021-05-21 20:51:10,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:10,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667472167] [2021-05-21 20:51:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:10,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:10,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667472167] [2021-05-21 20:51:10,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667472167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:10,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443644303] [2021-05-21 20:51:10,125 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 [2021-05-21 20:51:10,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:10,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:10,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:10,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443644303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:10,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:10,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:10,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202259023] [2021-05-21 20:51:10,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:10,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:10,219 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) [2021-05-21 20:51:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:10,318 INFO L93 Difference]: Finished difference Result 576 states and 1637 transitions. [2021-05-21 20:51:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:10,318 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 [2021-05-21 20:51:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:10,319 INFO L225 Difference]: With dead ends: 576 [2021-05-21 20:51:10,319 INFO L226 Difference]: Without dead ends: 567 [2021-05-21 20:51:10,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-21 20:51:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 272. [2021-05-21 20:51:10,322 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) [2021-05-21 20:51:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-21 20:51:10,323 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-21 20:51:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:10,323 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-21 20:51:10,323 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) [2021-05-21 20:51:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-21 20:51:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:10,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:10,323 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:10,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:10,524 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash -620013387, now seen corresponding path program 40 times [2021-05-21 20:51:10,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:10,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956388120] [2021-05-21 20:51:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:10,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:10,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956388120] [2021-05-21 20:51:10,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956388120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:10,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349967011] [2021-05-21 20:51:10,554 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 [2021-05-21 20:51:10,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:10,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:10,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349967011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:10,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:10,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:10,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023962922] [2021-05-21 20:51:10,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:10,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:10,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:10,632 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) [2021-05-21 20:51:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:10,727 INFO L93 Difference]: Finished difference Result 530 states and 1549 transitions. [2021-05-21 20:51:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:10,727 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 [2021-05-21 20:51:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:10,728 INFO L225 Difference]: With dead ends: 530 [2021-05-21 20:51:10,728 INFO L226 Difference]: Without dead ends: 530 [2021-05-21 20:51:10,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-21 20:51:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 264. [2021-05-21 20:51:10,731 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) [2021-05-21 20:51:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 794 transitions. [2021-05-21 20:51:10,731 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 794 transitions. Word has length 19 [2021-05-21 20:51:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:10,731 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 794 transitions. [2021-05-21 20:51:10,731 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) [2021-05-21 20:51:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 794 transitions. [2021-05-21 20:51:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:10,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:10,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:10,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:10,932 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1979491946, now seen corresponding path program 41 times [2021-05-21 20:51:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:10,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485660812] [2021-05-21 20:51:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:10,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:10,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485660812] [2021-05-21 20:51:10,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485660812] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:10,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:10,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:10,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916760755] [2021-05-21 20:51:10,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:10,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:10,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:10,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:10,962 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) [2021-05-21 20:51:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,033 INFO L93 Difference]: Finished difference Result 551 states and 1548 transitions. [2021-05-21 20:51:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,034 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 [2021-05-21 20:51:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,034 INFO L225 Difference]: With dead ends: 551 [2021-05-21 20:51:11,034 INFO L226 Difference]: Without dead ends: 545 [2021-05-21 20:51:11,034 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 [2021-05-21 20:51:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-21 20:51:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 274. [2021-05-21 20:51:11,037 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) [2021-05-21 20:51:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 819 transitions. [2021-05-21 20:51:11,038 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 819 transitions. Word has length 19 [2021-05-21 20:51:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,038 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 819 transitions. [2021-05-21 20:51:11,038 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) [2021-05-21 20:51:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 819 transitions. [2021-05-21 20:51:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,038 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616 [2021-05-21 20:51:11,039 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash 877577794, now seen corresponding path program 42 times [2021-05-21 20:51:11,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007329698] [2021-05-21 20:51:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007329698] [2021-05-21 20:51:11,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007329698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913492070] [2021-05-21 20:51:11,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,068 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) [2021-05-21 20:51:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,137 INFO L93 Difference]: Finished difference Result 515 states and 1465 transitions. [2021-05-21 20:51:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,137 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 [2021-05-21 20:51:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,137 INFO L225 Difference]: With dead ends: 515 [2021-05-21 20:51:11,137 INFO L226 Difference]: Without dead ends: 504 [2021-05-21 20:51:11,138 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 [2021-05-21 20:51:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-21 20:51:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 264. [2021-05-21 20:51:11,141 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) [2021-05-21 20:51:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 793 transitions. [2021-05-21 20:51:11,141 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 793 transitions. Word has length 19 [2021-05-21 20:51:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,141 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 793 transitions. [2021-05-21 20:51:11,141 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) [2021-05-21 20:51:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 793 transitions. [2021-05-21 20:51:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,141 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617 [2021-05-21 20:51:11,142 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1591463139, now seen corresponding path program 41 times [2021-05-21 20:51:11,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224170514] [2021-05-21 20:51:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224170514] [2021-05-21 20:51:11,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224170514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340881296] [2021-05-21 20:51:11,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,181 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) [2021-05-21 20:51:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,264 INFO L93 Difference]: Finished difference Result 504 states and 1450 transitions. [2021-05-21 20:51:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,264 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 [2021-05-21 20:51:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,265 INFO L225 Difference]: With dead ends: 504 [2021-05-21 20:51:11,265 INFO L226 Difference]: Without dead ends: 498 [2021-05-21 20:51:11,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-21 20:51:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 276. [2021-05-21 20:51:11,268 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) [2021-05-21 20:51:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 830 transitions. [2021-05-21 20:51:11,268 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 830 transitions. Word has length 19 [2021-05-21 20:51:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,268 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 830 transitions. [2021-05-21 20:51:11,268 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) [2021-05-21 20:51:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 830 transitions. [2021-05-21 20:51:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,269 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618 [2021-05-21 20:51:11,269 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1320953447, now seen corresponding path program 42 times [2021-05-21 20:51:11,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066634114] [2021-05-21 20:51:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066634114] [2021-05-21 20:51:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066634114] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822003523] [2021-05-21 20:51:11,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,299 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) [2021-05-21 20:51:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,386 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-05-21 20:51:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,387 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 [2021-05-21 20:51:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,387 INFO L225 Difference]: With dead ends: 482 [2021-05-21 20:51:11,387 INFO L226 Difference]: Without dead ends: 482 [2021-05-21 20:51:11,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-05-21 20:51:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 261. [2021-05-21 20:51:11,390 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) [2021-05-21 20:51:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 784 transitions. [2021-05-21 20:51:11,391 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 784 transitions. Word has length 19 [2021-05-21 20:51:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,391 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 784 transitions. [2021-05-21 20:51:11,391 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) [2021-05-21 20:51:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 784 transitions. [2021-05-21 20:51:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,391 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,391 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619 [2021-05-21 20:51:11,391 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -549537380, now seen corresponding path program 43 times [2021-05-21 20:51:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266098706] [2021-05-21 20:51:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266098706] [2021-05-21 20:51:11,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266098706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799215523] [2021-05-21 20:51:11,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,416 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) [2021-05-21 20:51:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,481 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-05-21 20:51:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,482 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 [2021-05-21 20:51:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,482 INFO L225 Difference]: With dead ends: 407 [2021-05-21 20:51:11,482 INFO L226 Difference]: Without dead ends: 383 [2021-05-21 20:51:11,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-21 20:51:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 265. [2021-05-21 20:51:11,485 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) [2021-05-21 20:51:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 790 transitions. [2021-05-21 20:51:11,485 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 790 transitions. Word has length 19 [2021-05-21 20:51:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,485 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 790 transitions. [2021-05-21 20:51:11,485 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) [2021-05-21 20:51:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 790 transitions. [2021-05-21 20:51:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620 [2021-05-21 20:51:11,486 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1404112814, now seen corresponding path program 44 times [2021-05-21 20:51:11,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256226336] [2021-05-21 20:51:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256226336] [2021-05-21 20:51:11,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256226336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980161869] [2021-05-21 20:51:11,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,513 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) [2021-05-21 20:51:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,593 INFO L93 Difference]: Finished difference Result 430 states and 1198 transitions. [2021-05-21 20:51:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,593 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 [2021-05-21 20:51:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,594 INFO L225 Difference]: With dead ends: 430 [2021-05-21 20:51:11,594 INFO L226 Difference]: Without dead ends: 424 [2021-05-21 20:51:11,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-21 20:51:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 275. [2021-05-21 20:51:11,597 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) [2021-05-21 20:51:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 815 transitions. [2021-05-21 20:51:11,597 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 815 transitions. Word has length 19 [2021-05-21 20:51:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,597 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 815 transitions. [2021-05-21 20:51:11,597 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) [2021-05-21 20:51:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 815 transitions. [2021-05-21 20:51:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,598 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621 [2021-05-21 20:51:11,598 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,598 INFO L82 PathProgramCache]: Analyzing trace with hash -986737450, now seen corresponding path program 45 times [2021-05-21 20:51:11,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637704292] [2021-05-21 20:51:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637704292] [2021-05-21 20:51:11,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637704292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865574606] [2021-05-21 20:51:11,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,644 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) [2021-05-21 20:51:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,723 INFO L93 Difference]: Finished difference Result 394 states and 1115 transitions. [2021-05-21 20:51:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,723 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 [2021-05-21 20:51:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,724 INFO L225 Difference]: With dead ends: 394 [2021-05-21 20:51:11,724 INFO L226 Difference]: Without dead ends: 379 [2021-05-21 20:51:11,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-21 20:51:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 261. [2021-05-21 20:51:11,727 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) [2021-05-21 20:51:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 780 transitions. [2021-05-21 20:51:11,727 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 780 transitions. Word has length 19 [2021-05-21 20:51:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,727 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 780 transitions. [2021-05-21 20:51:11,727 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) [2021-05-21 20:51:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 780 transitions. [2021-05-21 20:51:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622 [2021-05-21 20:51:11,728 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash 879484852, now seen corresponding path program 46 times [2021-05-21 20:51:11,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686173129] [2021-05-21 20:51:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686173129] [2021-05-21 20:51:11,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686173129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389033825] [2021-05-21 20:51:11,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,753 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) [2021-05-21 20:51:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,812 INFO L93 Difference]: Finished difference Result 393 states and 1118 transitions. [2021-05-21 20:51:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,812 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 [2021-05-21 20:51:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,813 INFO L225 Difference]: With dead ends: 393 [2021-05-21 20:51:11,813 INFO L226 Difference]: Without dead ends: 381 [2021-05-21 20:51:11,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-21 20:51:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 263. [2021-05-21 20:51:11,815 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) [2021-05-21 20:51:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 783 transitions. [2021-05-21 20:51:11,816 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 783 transitions. Word has length 19 [2021-05-21 20:51:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,816 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 783 transitions. [2021-05-21 20:51:11,816 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) [2021-05-21 20:51:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 783 transitions. [2021-05-21 20:51:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623 [2021-05-21 20:51:11,816 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash 199463632, now seen corresponding path program 47 times [2021-05-21 20:51:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243576189] [2021-05-21 20:51:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243576189] [2021-05-21 20:51:11,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243576189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215052388] [2021-05-21 20:51:11,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,849 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) [2021-05-21 20:51:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:11,928 INFO L93 Difference]: Finished difference Result 381 states and 1080 transitions. [2021-05-21 20:51:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:11,928 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 [2021-05-21 20:51:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:11,929 INFO L225 Difference]: With dead ends: 381 [2021-05-21 20:51:11,929 INFO L226 Difference]: Without dead ends: 375 [2021-05-21 20:51:11,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-21 20:51:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 273. [2021-05-21 20:51:11,931 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) [2021-05-21 20:51:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 808 transitions. [2021-05-21 20:51:11,932 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 808 transitions. Word has length 19 [2021-05-21 20:51:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:11,932 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 808 transitions. [2021-05-21 20:51:11,932 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) [2021-05-21 20:51:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 808 transitions. [2021-05-21 20:51:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:11,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:11,932 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:11,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624 [2021-05-21 20:51:11,932 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:11,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2103580664, now seen corresponding path program 48 times [2021-05-21 20:51:11,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:11,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717178149] [2021-05-21 20:51:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:11,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717178149] [2021-05-21 20:51:11,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717178149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:11,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:11,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:11,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909649500] [2021-05-21 20:51:11,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:11,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:11,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:11,961 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) [2021-05-21 20:51:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:12,037 INFO L93 Difference]: Finished difference Result 345 states and 997 transitions. [2021-05-21 20:51:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:12,037 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 [2021-05-21 20:51:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:12,038 INFO L225 Difference]: With dead ends: 345 [2021-05-21 20:51:12,038 INFO L226 Difference]: Without dead ends: 328 [2021-05-21 20:51:12,038 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 [2021-05-21 20:51:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-21 20:51:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 257. [2021-05-21 20:51:12,040 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) [2021-05-21 20:51:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 772 transitions. [2021-05-21 20:51:12,040 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 772 transitions. Word has length 19 [2021-05-21 20:51:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:12,041 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 772 transitions. [2021-05-21 20:51:12,041 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) [2021-05-21 20:51:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 772 transitions. [2021-05-21 20:51:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:12,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:12,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:12,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625 [2021-05-21 20:51:12,041 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:12,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1070480311, now seen corresponding path program 43 times [2021-05-21 20:51:12,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:12,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340505574] [2021-05-21 20:51:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:12,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:12,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340505574] [2021-05-21 20:51:12,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340505574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:12,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171627260] [2021-05-21 20:51:12,067 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 [2021-05-21 20:51:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:12,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171627260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:12,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:12,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:51:12,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061356645] [2021-05-21 20:51:12,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:51:12,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:51:12,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:12,130 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) [2021-05-21 20:51:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:12,211 INFO L93 Difference]: Finished difference Result 449 states and 1320 transitions. [2021-05-21 20:51:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:12,212 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 [2021-05-21 20:51:12,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:12,212 INFO L225 Difference]: With dead ends: 449 [2021-05-21 20:51:12,212 INFO L226 Difference]: Without dead ends: 449 [2021-05-21 20:51:12,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-21 20:51:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 235. [2021-05-21 20:51:12,215 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) [2021-05-21 20:51:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 707 transitions. [2021-05-21 20:51:12,215 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 707 transitions. Word has length 19 [2021-05-21 20:51:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:12,215 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 707 transitions. [2021-05-21 20:51:12,215 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) [2021-05-21 20:51:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 707 transitions. [2021-05-21 20:51:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:12,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:12,216 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:12,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:12,416 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash 170307403, now seen corresponding path program 44 times [2021-05-21 20:51:12,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:12,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292923902] [2021-05-21 20:51:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:12,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:12,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292923902] [2021-05-21 20:51:12,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292923902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:12,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363762654] [2021-05-21 20:51:12,445 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 [2021-05-21 20:51:12,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:12,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:12,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:12,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363762654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:12,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:12,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:12,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513780194] [2021-05-21 20:51:12,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:12,531 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) [2021-05-21 20:51:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:12,619 INFO L93 Difference]: Finished difference Result 437 states and 1251 transitions. [2021-05-21 20:51:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:12,619 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 [2021-05-21 20:51:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:12,620 INFO L225 Difference]: With dead ends: 437 [2021-05-21 20:51:12,620 INFO L226 Difference]: Without dead ends: 431 [2021-05-21 20:51:12,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-21 20:51:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 241. [2021-05-21 20:51:12,623 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) [2021-05-21 20:51:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 721 transitions. [2021-05-21 20:51:12,623 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 721 transitions. Word has length 19 [2021-05-21 20:51:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:12,623 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 721 transitions. [2021-05-21 20:51:12,623 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) [2021-05-21 20:51:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 721 transitions. [2021-05-21 20:51:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:12,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:12,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:12,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-05-21 20:51:12,824 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:12,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1045052217, now seen corresponding path program 45 times [2021-05-21 20:51:12,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:12,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029624849] [2021-05-21 20:51:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:12,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:12,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029624849] [2021-05-21 20:51:12,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029624849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:12,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915569062] [2021-05-21 20:51:12,852 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 [2021-05-21 20:51:12,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:12,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915569062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:12,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:12,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477033834] [2021-05-21 20:51:12,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:12,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:12,921 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) [2021-05-21 20:51:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:13,011 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-05-21 20:51:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:13,012 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 [2021-05-21 20:51:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:13,012 INFO L225 Difference]: With dead ends: 415 [2021-05-21 20:51:13,012 INFO L226 Difference]: Without dead ends: 415 [2021-05-21 20:51:13,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-21 20:51:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 214. [2021-05-21 20:51:13,015 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) [2021-05-21 20:51:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 639 transitions. [2021-05-21 20:51:13,015 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 639 transitions. Word has length 19 [2021-05-21 20:51:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:13,015 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 639 transitions. [2021-05-21 20:51:13,015 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) [2021-05-21 20:51:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 639 transitions. [2021-05-21 20:51:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:13,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:13,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:13,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-05-21 20:51:13,216 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:13,216 INFO L82 PathProgramCache]: Analyzing trace with hash -990658535, now seen corresponding path program 46 times [2021-05-21 20:51:13,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:13,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557835257] [2021-05-21 20:51:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:13,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:13,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557835257] [2021-05-21 20:51:13,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557835257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:13,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542814076] [2021-05-21 20:51:13,240 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 [2021-05-21 20:51:13,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:13,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:13,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:13,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542814076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:13,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:13,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:13,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378568754] [2021-05-21 20:51:13,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:13,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:13,310 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) [2021-05-21 20:51:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:13,389 INFO L93 Difference]: Finished difference Result 367 states and 1064 transitions. [2021-05-21 20:51:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:13,390 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 [2021-05-21 20:51:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:13,390 INFO L225 Difference]: With dead ends: 367 [2021-05-21 20:51:13,390 INFO L226 Difference]: Without dead ends: 355 [2021-05-21 20:51:13,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:13,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-21 20:51:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 217. [2021-05-21 20:51:13,392 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) [2021-05-21 20:51:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-05-21 20:51:13,393 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-05-21 20:51:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:13,393 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-05-21 20:51:13,393 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) [2021-05-21 20:51:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-05-21 20:51:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:13,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:13,393 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:13,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-05-21 20:51:13,594 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:13,594 INFO L82 PathProgramCache]: Analyzing trace with hash -33107299, now seen corresponding path program 47 times [2021-05-21 20:51:13,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:13,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893332222] [2021-05-21 20:51:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:13,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893332222] [2021-05-21 20:51:13,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893332222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622476288] [2021-05-21 20:51:13,620 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 [2021-05-21 20:51:13,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:13,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:13,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:13,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622476288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:13,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:13,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:13,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418183351] [2021-05-21 20:51:13,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:13,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:13,699 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) [2021-05-21 20:51:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:13,783 INFO L93 Difference]: Finished difference Result 355 states and 1025 transitions. [2021-05-21 20:51:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:13,783 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 [2021-05-21 20:51:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:13,784 INFO L225 Difference]: With dead ends: 355 [2021-05-21 20:51:13,784 INFO L226 Difference]: Without dead ends: 349 [2021-05-21 20:51:13,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-21 20:51:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 229. [2021-05-21 20:51:13,786 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) [2021-05-21 20:51:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 687 transitions. [2021-05-21 20:51:13,786 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 687 transitions. Word has length 19 [2021-05-21 20:51:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:13,787 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 687 transitions. [2021-05-21 20:51:13,787 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) [2021-05-21 20:51:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 687 transitions. [2021-05-21 20:51:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:13,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:13,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:14,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:14,001 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:14,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1248466919, now seen corresponding path program 48 times [2021-05-21 20:51:14,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:14,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441416995] [2021-05-21 20:51:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:14,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:14,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441416995] [2021-05-21 20:51:14,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441416995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:14,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667398654] [2021-05-21 20:51:14,031 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 [2021-05-21 20:51:14,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:14,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:14,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667398654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:14,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:14,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:14,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513012136] [2021-05-21 20:51:14,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:14,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:14,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:14,111 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) [2021-05-21 20:51:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:14,198 INFO L93 Difference]: Finished difference Result 320 states and 940 transitions. [2021-05-21 20:51:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:14,199 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 [2021-05-21 20:51:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:14,199 INFO L225 Difference]: With dead ends: 320 [2021-05-21 20:51:14,199 INFO L226 Difference]: Without dead ends: 320 [2021-05-21 20:51:14,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-21 20:51:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 215. [2021-05-21 20:51:14,201 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) [2021-05-21 20:51:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 643 transitions. [2021-05-21 20:51:14,202 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 643 transitions. Word has length 19 [2021-05-21 20:51:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:14,202 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 643 transitions. [2021-05-21 20:51:14,202 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) [2021-05-21 20:51:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 643 transitions. [2021-05-21 20:51:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:14,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:14,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:14,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:14,403 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:14,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1006159271, now seen corresponding path program 49 times [2021-05-21 20:51:14,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:14,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214382427] [2021-05-21 20:51:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:14,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:14,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214382427] [2021-05-21 20:51:14,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214382427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:14,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:14,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:14,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175949385] [2021-05-21 20:51:14,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:14,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:14,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:14,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:14,431 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) [2021-05-21 20:51:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:14,525 INFO L93 Difference]: Finished difference Result 361 states and 1031 transitions. [2021-05-21 20:51:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:14,526 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 [2021-05-21 20:51:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:14,526 INFO L225 Difference]: With dead ends: 361 [2021-05-21 20:51:14,526 INFO L226 Difference]: Without dead ends: 353 [2021-05-21 20:51:14,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-21 20:51:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 233. [2021-05-21 20:51:14,529 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) [2021-05-21 20:51:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 695 transitions. [2021-05-21 20:51:14,529 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 695 transitions. Word has length 19 [2021-05-21 20:51:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:14,529 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 695 transitions. [2021-05-21 20:51:14,529 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) [2021-05-21 20:51:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 695 transitions. [2021-05-21 20:51:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:14,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:14,530 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:14,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638 [2021-05-21 20:51:14,530 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1386896911, now seen corresponding path program 50 times [2021-05-21 20:51:14,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:14,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022911609] [2021-05-21 20:51:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:14,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:14,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022911609] [2021-05-21 20:51:14,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022911609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:14,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:14,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:14,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368136070] [2021-05-21 20:51:14,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:14,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:14,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:14,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:14,558 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) [2021-05-21 20:51:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:14,661 INFO L93 Difference]: Finished difference Result 359 states and 1026 transitions. [2021-05-21 20:51:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:14,661 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 [2021-05-21 20:51:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:14,662 INFO L225 Difference]: With dead ends: 359 [2021-05-21 20:51:14,662 INFO L226 Difference]: Without dead ends: 351 [2021-05-21 20:51:14,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-21 20:51:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 231. [2021-05-21 20:51:14,664 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) [2021-05-21 20:51:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-05-21 20:51:14,664 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 19 [2021-05-21 20:51:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:14,664 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-05-21 20:51:14,664 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) [2021-05-21 20:51:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-05-21 20:51:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:14,665 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:14,665 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:14,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639 [2021-05-21 20:51:14,665 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1984233569, now seen corresponding path program 51 times [2021-05-21 20:51:14,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:14,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328533807] [2021-05-21 20:51:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:14,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:14,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328533807] [2021-05-21 20:51:14,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328533807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:14,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:14,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:14,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932811092] [2021-05-21 20:51:14,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:14,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:14,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:14,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:14,690 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) [2021-05-21 20:51:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:14,778 INFO L93 Difference]: Finished difference Result 373 states and 1067 transitions. [2021-05-21 20:51:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:14,778 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 [2021-05-21 20:51:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:14,779 INFO L225 Difference]: With dead ends: 373 [2021-05-21 20:51:14,779 INFO L226 Difference]: Without dead ends: 359 [2021-05-21 20:51:14,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-21 20:51:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-21 20:51:14,781 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) [2021-05-21 20:51:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-05-21 20:51:14,781 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 19 [2021-05-21 20:51:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:14,781 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-05-21 20:51:14,781 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) [2021-05-21 20:51:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-05-21 20:51:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:14,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:14,782 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:14,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640 [2021-05-21 20:51:14,782 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1454990024, now seen corresponding path program 49 times [2021-05-21 20:51:14,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:14,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784937146] [2021-05-21 20:51:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:14,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:14,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784937146] [2021-05-21 20:51:14,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784937146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:14,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11937609] [2021-05-21 20:51:14,814 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 [2021-05-21 20:51:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:14,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:14,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:14,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11937609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:14,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:14,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:14,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888806764] [2021-05-21 20:51:14,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:14,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:14,906 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) [2021-05-21 20:51:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:14,992 INFO L93 Difference]: Finished difference Result 461 states and 1330 transitions. [2021-05-21 20:51:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:14,992 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 [2021-05-21 20:51:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:14,993 INFO L225 Difference]: With dead ends: 461 [2021-05-21 20:51:14,993 INFO L226 Difference]: Without dead ends: 461 [2021-05-21 20:51:14,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-21 20:51:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 235. [2021-05-21 20:51:14,996 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) [2021-05-21 20:51:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 706 transitions. [2021-05-21 20:51:14,996 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 706 transitions. Word has length 19 [2021-05-21 20:51:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:14,996 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 706 transitions. [2021-05-21 20:51:14,996 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) [2021-05-21 20:51:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 706 transitions. [2021-05-21 20:51:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:14,996 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:14,996 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:15,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-05-21 20:51:15,197 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -524828848, now seen corresponding path program 50 times [2021-05-21 20:51:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396536836] [2021-05-21 20:51:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:15,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:15,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396536836] [2021-05-21 20:51:15,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396536836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:15,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878200884] [2021-05-21 20:51:15,231 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 [2021-05-21 20:51:15,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:15,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:15,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878200884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:15,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:15,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:15,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292038625] [2021-05-21 20:51:15,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:15,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:15,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:15,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:15,325 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) [2021-05-21 20:51:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:15,442 INFO L93 Difference]: Finished difference Result 467 states and 1339 transitions. [2021-05-21 20:51:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:15,442 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 [2021-05-21 20:51:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:15,443 INFO L225 Difference]: With dead ends: 467 [2021-05-21 20:51:15,443 INFO L226 Difference]: Without dead ends: 461 [2021-05-21 20:51:15,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-21 20:51:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 232. [2021-05-21 20:51:15,447 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) [2021-05-21 20:51:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 694 transitions. [2021-05-21 20:51:15,447 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 694 transitions. Word has length 19 [2021-05-21 20:51:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:15,448 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 694 transitions. [2021-05-21 20:51:15,448 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) [2021-05-21 20:51:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 694 transitions. [2021-05-21 20:51:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:15,448 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:15,448 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:15,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-05-21 20:51:15,671 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:15,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1537521380, now seen corresponding path program 51 times [2021-05-21 20:51:15,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:15,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23267194] [2021-05-21 20:51:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:15,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:15,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23267194] [2021-05-21 20:51:15,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23267194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:15,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355391959] [2021-05-21 20:51:15,697 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 [2021-05-21 20:51:15,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:15,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355391959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:15,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:15,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:15,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643409505] [2021-05-21 20:51:15,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:15,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:15,771 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) [2021-05-21 20:51:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:15,841 INFO L93 Difference]: Finished difference Result 458 states and 1306 transitions. [2021-05-21 20:51:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:15,841 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 [2021-05-21 20:51:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:15,842 INFO L225 Difference]: With dead ends: 458 [2021-05-21 20:51:15,842 INFO L226 Difference]: Without dead ends: 446 [2021-05-21 20:51:15,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-21 20:51:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 230. [2021-05-21 20:51:15,844 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) [2021-05-21 20:51:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 686 transitions. [2021-05-21 20:51:15,845 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 686 transitions. Word has length 19 [2021-05-21 20:51:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:15,845 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 686 transitions. [2021-05-21 20:51:15,845 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) [2021-05-21 20:51:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 686 transitions. [2021-05-21 20:51:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:15,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:15,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:16,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:16,046 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:16,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:16,046 INFO L82 PathProgramCache]: Analyzing trace with hash 242250915, now seen corresponding path program 52 times [2021-05-21 20:51:16,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:16,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495655773] [2021-05-21 20:51:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:16,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:16,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495655773] [2021-05-21 20:51:16,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495655773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:16,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:16,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:16,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174223644] [2021-05-21 20:51:16,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:16,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:16,075 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) [2021-05-21 20:51:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:16,175 INFO L93 Difference]: Finished difference Result 403 states and 1125 transitions. [2021-05-21 20:51:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:16,175 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 [2021-05-21 20:51:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:16,175 INFO L225 Difference]: With dead ends: 403 [2021-05-21 20:51:16,176 INFO L226 Difference]: Without dead ends: 395 [2021-05-21 20:51:16,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-21 20:51:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 242. [2021-05-21 20:51:16,178 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) [2021-05-21 20:51:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 732 transitions. [2021-05-21 20:51:16,179 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 732 transitions. Word has length 19 [2021-05-21 20:51:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:16,179 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 732 transitions. [2021-05-21 20:51:16,179 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) [2021-05-21 20:51:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 732 transitions. [2021-05-21 20:51:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:16,179 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:16,179 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:16,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648 [2021-05-21 20:51:16,179 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:16,179 INFO L82 PathProgramCache]: Analyzing trace with hash 622988555, now seen corresponding path program 53 times [2021-05-21 20:51:16,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:16,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677449387] [2021-05-21 20:51:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:16,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:16,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677449387] [2021-05-21 20:51:16,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677449387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:16,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:16,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:16,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458567133] [2021-05-21 20:51:16,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:16,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:16,209 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) [2021-05-21 20:51:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:16,309 INFO L93 Difference]: Finished difference Result 409 states and 1140 transitions. [2021-05-21 20:51:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:16,310 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 [2021-05-21 20:51:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:16,310 INFO L225 Difference]: With dead ends: 409 [2021-05-21 20:51:16,310 INFO L226 Difference]: Without dead ends: 401 [2021-05-21 20:51:16,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-21 20:51:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 244. [2021-05-21 20:51:16,313 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) [2021-05-21 20:51:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 736 transitions. [2021-05-21 20:51:16,313 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 736 transitions. Word has length 19 [2021-05-21 20:51:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:16,314 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 736 transitions. [2021-05-21 20:51:16,314 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) [2021-05-21 20:51:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 736 transitions. [2021-05-21 20:51:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:16,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:16,314 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:16,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649 [2021-05-21 20:51:16,314 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2120353452, now seen corresponding path program 52 times [2021-05-21 20:51:16,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:16,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693943848] [2021-05-21 20:51:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:16,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:16,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693943848] [2021-05-21 20:51:16,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693943848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:16,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080642917] [2021-05-21 20:51:16,348 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 [2021-05-21 20:51:16,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:16,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:16,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080642917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:16,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:16,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:16,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141282574] [2021-05-21 20:51:16,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:16,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:16,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:16,439 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) [2021-05-21 20:51:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:16,523 INFO L93 Difference]: Finished difference Result 532 states and 1524 transitions. [2021-05-21 20:51:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:16,524 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 [2021-05-21 20:51:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:16,524 INFO L225 Difference]: With dead ends: 532 [2021-05-21 20:51:16,524 INFO L226 Difference]: Without dead ends: 532 [2021-05-21 20:51:16,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-21 20:51:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 250. [2021-05-21 20:51:16,527 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) [2021-05-21 20:51:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 763 transitions. [2021-05-21 20:51:16,528 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 763 transitions. Word has length 19 [2021-05-21 20:51:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:16,528 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 763 transitions. [2021-05-21 20:51:16,528 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) [2021-05-21 20:51:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 763 transitions. [2021-05-21 20:51:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:16,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:16,528 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:16,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-05-21 20:51:16,729 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1190192276, now seen corresponding path program 53 times [2021-05-21 20:51:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536620130] [2021-05-21 20:51:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:16,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:16,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536620130] [2021-05-21 20:51:16,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536620130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:16,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235230941] [2021-05-21 20:51:16,763 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 [2021-05-21 20:51:16,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:16,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:16,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235230941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:16,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:16,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:16,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520151307] [2021-05-21 20:51:16,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:16,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:16,854 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) [2021-05-21 20:51:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:16,934 INFO L93 Difference]: Finished difference Result 514 states and 1455 transitions. [2021-05-21 20:51:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:16,935 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 [2021-05-21 20:51:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:16,935 INFO L225 Difference]: With dead ends: 514 [2021-05-21 20:51:16,935 INFO L226 Difference]: Without dead ends: 508 [2021-05-21 20:51:16,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-05-21 20:51:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 249. [2021-05-21 20:51:16,938 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) [2021-05-21 20:51:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 758 transitions. [2021-05-21 20:51:16,939 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 758 transitions. Word has length 19 [2021-05-21 20:51:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:16,939 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 758 transitions. [2021-05-21 20:51:16,939 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) [2021-05-21 20:51:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 758 transitions. [2021-05-21 20:51:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:16,939 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:16,939 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:17,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-05-21 20:51:17,140 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash 38116775, now seen corresponding path program 54 times [2021-05-21 20:51:17,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:17,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462031059] [2021-05-21 20:51:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:17,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:17,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462031059] [2021-05-21 20:51:17,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462031059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960107879] [2021-05-21 20:51:17,174 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 [2021-05-21 20:51:17,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:17,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:17,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960107879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:17,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:17,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:17,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827364740] [2021-05-21 20:51:17,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:17,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:17,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:17,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:17,268 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) [2021-05-21 20:51:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:17,359 INFO L93 Difference]: Finished difference Result 375 states and 1066 transitions. [2021-05-21 20:51:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:17,359 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 [2021-05-21 20:51:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:17,360 INFO L225 Difference]: With dead ends: 375 [2021-05-21 20:51:17,360 INFO L226 Difference]: Without dead ends: 367 [2021-05-21 20:51:17,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-21 20:51:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 249. [2021-05-21 20:51:17,363 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) [2021-05-21 20:51:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 761 transitions. [2021-05-21 20:51:17,363 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 761 transitions. Word has length 19 [2021-05-21 20:51:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:17,363 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 761 transitions. [2021-05-21 20:51:17,363 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) [2021-05-21 20:51:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 761 transitions. [2021-05-21 20:51:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:17,363 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:17,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:17,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-05-21 20:51:17,564 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:17,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1919953796, now seen corresponding path program 54 times [2021-05-21 20:51:17,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:17,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599307140] [2021-05-21 20:51:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:17,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:17,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599307140] [2021-05-21 20:51:17,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599307140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:17,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673061873] [2021-05-21 20:51:17,597 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 [2021-05-21 20:51:17,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:51:17,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:17,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:17,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:17,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673061873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:17,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:17,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:17,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942851186] [2021-05-21 20:51:17,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:17,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:17,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:17,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:17,687 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) [2021-05-21 20:51:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:17,778 INFO L93 Difference]: Finished difference Result 459 states and 1316 transitions. [2021-05-21 20:51:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:17,779 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 [2021-05-21 20:51:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:17,779 INFO L225 Difference]: With dead ends: 459 [2021-05-21 20:51:17,779 INFO L226 Difference]: Without dead ends: 459 [2021-05-21 20:51:17,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-21 20:51:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 240. [2021-05-21 20:51:17,782 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) [2021-05-21 20:51:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 731 transitions. [2021-05-21 20:51:17,782 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 731 transitions. Word has length 19 [2021-05-21 20:51:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:17,782 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 731 transitions. [2021-05-21 20:51:17,782 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) [2021-05-21 20:51:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 731 transitions. [2021-05-21 20:51:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:17,783 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:17,783 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:17,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-05-21 20:51:17,983 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:17,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2001194468, now seen corresponding path program 55 times [2021-05-21 20:51:17,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:17,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952089622] [2021-05-21 20:51:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:18,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:18,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952089622] [2021-05-21 20:51:18,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952089622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:18,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759251395] [2021-05-21 20:51:18,031 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 [2021-05-21 20:51:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:18,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759251395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:18,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:18,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:18,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404659731] [2021-05-21 20:51:18,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:18,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:18,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:18,137 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) [2021-05-21 20:51:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:18,241 INFO L93 Difference]: Finished difference Result 414 states and 1188 transitions. [2021-05-21 20:51:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:18,241 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 [2021-05-21 20:51:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:18,242 INFO L225 Difference]: With dead ends: 414 [2021-05-21 20:51:18,242 INFO L226 Difference]: Without dead ends: 405 [2021-05-21 20:51:18,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-21 20:51:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 240. [2021-05-21 20:51:18,246 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) [2021-05-21 20:51:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 727 transitions. [2021-05-21 20:51:18,246 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 727 transitions. Word has length 19 [2021-05-21 20:51:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:18,246 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 727 transitions. [2021-05-21 20:51:18,246 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) [2021-05-21 20:51:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 727 transitions. [2021-05-21 20:51:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:18,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:18,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:18,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable658 [2021-05-21 20:51:18,470 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash 318111335, now seen corresponding path program 55 times [2021-05-21 20:51:18,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:18,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021823133] [2021-05-21 20:51:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:18,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:18,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021823133] [2021-05-21 20:51:18,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021823133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:18,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588972128] [2021-05-21 20:51:18,511 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 [2021-05-21 20:51:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:18,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588972128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:18,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:18,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:18,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916881111] [2021-05-21 20:51:18,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:18,607 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) [2021-05-21 20:51:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:18,715 INFO L93 Difference]: Finished difference Result 347 states and 1016 transitions. [2021-05-21 20:51:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:18,715 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 [2021-05-21 20:51:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:18,716 INFO L225 Difference]: With dead ends: 347 [2021-05-21 20:51:18,716 INFO L226 Difference]: Without dead ends: 347 [2021-05-21 20:51:18,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-21 20:51:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 236. [2021-05-21 20:51:18,718 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) [2021-05-21 20:51:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 715 transitions. [2021-05-21 20:51:18,718 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 715 transitions. Word has length 19 [2021-05-21 20:51:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:18,718 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 715 transitions. [2021-05-21 20:51:18,718 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) [2021-05-21 20:51:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 715 transitions. [2021-05-21 20:51:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:18,719 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:18,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:18,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:18,919 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:18,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1377350628, now seen corresponding path program 56 times [2021-05-21 20:51:18,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:18,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861314374] [2021-05-21 20:51:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:18,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:18,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861314374] [2021-05-21 20:51:18,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861314374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:18,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:18,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:18,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122201004] [2021-05-21 20:51:18,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:18,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:18,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:18,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:18,950 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) [2021-05-21 20:51:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,021 INFO L93 Difference]: Finished difference Result 452 states and 1270 transitions. [2021-05-21 20:51:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,021 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 [2021-05-21 20:51:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,021 INFO L225 Difference]: With dead ends: 452 [2021-05-21 20:51:19,022 INFO L226 Difference]: Without dead ends: 446 [2021-05-21 20:51:19,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-21 20:51:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 246. [2021-05-21 20:51:19,024 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) [2021-05-21 20:51:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 740 transitions. [2021-05-21 20:51:19,025 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 740 transitions. Word has length 19 [2021-05-21 20:51:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,025 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 740 transitions. [2021-05-21 20:51:19,025 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) [2021-05-21 20:51:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 740 transitions. [2021-05-21 20:51:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662 [2021-05-21 20:51:19,025 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1815702516, now seen corresponding path program 57 times [2021-05-21 20:51:19,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393695123] [2021-05-21 20:51:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393695123] [2021-05-21 20:51:19,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393695123] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676177667] [2021-05-21 20:51:19,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,055 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) [2021-05-21 20:51:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,124 INFO L93 Difference]: Finished difference Result 416 states and 1187 transitions. [2021-05-21 20:51:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,125 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 [2021-05-21 20:51:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,125 INFO L225 Difference]: With dead ends: 416 [2021-05-21 20:51:19,125 INFO L226 Difference]: Without dead ends: 405 [2021-05-21 20:51:19,125 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 [2021-05-21 20:51:19,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-21 20:51:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 236. [2021-05-21 20:51:19,128 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) [2021-05-21 20:51:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 714 transitions. [2021-05-21 20:51:19,132 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 714 transitions. Word has length 19 [2021-05-21 20:51:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,132 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 714 transitions. [2021-05-21 20:51:19,132 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) [2021-05-21 20:51:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 714 transitions. [2021-05-21 20:51:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,132 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable663 [2021-05-21 20:51:19,132 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash -653338417, now seen corresponding path program 56 times [2021-05-21 20:51:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565499247] [2021-05-21 20:51:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565499247] [2021-05-21 20:51:19,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565499247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035906055] [2021-05-21 20:51:19,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,167 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) [2021-05-21 20:51:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,280 INFO L93 Difference]: Finished difference Result 388 states and 1108 transitions. [2021-05-21 20:51:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,281 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 [2021-05-21 20:51:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,281 INFO L225 Difference]: With dead ends: 388 [2021-05-21 20:51:19,281 INFO L226 Difference]: Without dead ends: 382 [2021-05-21 20:51:19,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-21 20:51:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 248. [2021-05-21 20:51:19,284 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) [2021-05-21 20:51:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 751 transitions. [2021-05-21 20:51:19,284 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 751 transitions. Word has length 19 [2021-05-21 20:51:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,284 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 751 transitions. [2021-05-21 20:51:19,284 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) [2021-05-21 20:51:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 751 transitions. [2021-05-21 20:51:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable664 [2021-05-21 20:51:19,285 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash -382828725, now seen corresponding path program 57 times [2021-05-21 20:51:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605626178] [2021-05-21 20:51:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605626178] [2021-05-21 20:51:19,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605626178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262929676] [2021-05-21 20:51:19,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,325 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) [2021-05-21 20:51:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,439 INFO L93 Difference]: Finished difference Result 366 states and 1071 transitions. [2021-05-21 20:51:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,439 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 [2021-05-21 20:51:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,439 INFO L225 Difference]: With dead ends: 366 [2021-05-21 20:51:19,439 INFO L226 Difference]: Without dead ends: 366 [2021-05-21 20:51:19,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-21 20:51:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 235. [2021-05-21 20:51:19,442 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) [2021-05-21 20:51:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 711 transitions. [2021-05-21 20:51:19,442 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 711 transitions. Word has length 19 [2021-05-21 20:51:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,442 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 711 transitions. [2021-05-21 20:51:19,442 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) [2021-05-21 20:51:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 711 transitions. [2021-05-21 20:51:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665 [2021-05-21 20:51:19,443 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1250504300, now seen corresponding path program 58 times [2021-05-21 20:51:19,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630780514] [2021-05-21 20:51:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630780514] [2021-05-21 20:51:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630780514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331721553] [2021-05-21 20:51:19,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,468 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) [2021-05-21 20:51:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,530 INFO L93 Difference]: Finished difference Result 391 states and 1119 transitions. [2021-05-21 20:51:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,531 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 [2021-05-21 20:51:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,531 INFO L225 Difference]: With dead ends: 391 [2021-05-21 20:51:19,531 INFO L226 Difference]: Without dead ends: 379 [2021-05-21 20:51:19,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-21 20:51:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 237. [2021-05-21 20:51:19,534 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) [2021-05-21 20:51:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 714 transitions. [2021-05-21 20:51:19,534 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 714 transitions. Word has length 19 [2021-05-21 20:51:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,534 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 714 transitions. [2021-05-21 20:51:19,534 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) [2021-05-21 20:51:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 714 transitions. [2021-05-21 20:51:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,534 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666 [2021-05-21 20:51:19,535 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1644682960, now seen corresponding path program 59 times [2021-05-21 20:51:19,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190745538] [2021-05-21 20:51:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190745538] [2021-05-21 20:51:19,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190745538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765860264] [2021-05-21 20:51:19,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,562 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) [2021-05-21 20:51:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,634 INFO L93 Difference]: Finished difference Result 379 states and 1081 transitions. [2021-05-21 20:51:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,634 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 [2021-05-21 20:51:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,634 INFO L225 Difference]: With dead ends: 379 [2021-05-21 20:51:19,634 INFO L226 Difference]: Without dead ends: 373 [2021-05-21 20:51:19,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-21 20:51:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 247. [2021-05-21 20:51:19,637 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) [2021-05-21 20:51:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 739 transitions. [2021-05-21 20:51:19,637 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 739 transitions. Word has length 19 [2021-05-21 20:51:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,637 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 739 transitions. [2021-05-21 20:51:19,637 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) [2021-05-21 20:51:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 739 transitions. [2021-05-21 20:51:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,638 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,638 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667 [2021-05-21 20:51:19,638 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,638 INFO L82 PathProgramCache]: Analyzing trace with hash 542768808, now seen corresponding path program 60 times [2021-05-21 20:51:19,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512275926] [2021-05-21 20:51:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512275926] [2021-05-21 20:51:19,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512275926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12064793] [2021-05-21 20:51:19,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,666 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) [2021-05-21 20:51:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,723 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-05-21 20:51:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,723 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 [2021-05-21 20:51:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,724 INFO L225 Difference]: With dead ends: 343 [2021-05-21 20:51:19,724 INFO L226 Difference]: Without dead ends: 330 [2021-05-21 20:51:19,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-21 20:51:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 235. [2021-05-21 20:51:19,726 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) [2021-05-21 20:51:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 710 transitions. [2021-05-21 20:51:19,726 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 710 transitions. Word has length 19 [2021-05-21 20:51:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,726 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 710 transitions. [2021-05-21 20:51:19,726 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) [2021-05-21 20:51:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 710 transitions. [2021-05-21 20:51:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,727 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668 [2021-05-21 20:51:19,727 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1072803101, now seen corresponding path program 58 times [2021-05-21 20:51:19,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009667377] [2021-05-21 20:51:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009667377] [2021-05-21 20:51:19,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009667377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698263491] [2021-05-21 20:51:19,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,753 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) [2021-05-21 20:51:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,847 INFO L93 Difference]: Finished difference Result 325 states and 939 transitions. [2021-05-21 20:51:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,847 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 [2021-05-21 20:51:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,848 INFO L225 Difference]: With dead ends: 325 [2021-05-21 20:51:19,848 INFO L226 Difference]: Without dead ends: 313 [2021-05-21 20:51:19,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-21 20:51:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 235. [2021-05-21 20:51:19,850 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) [2021-05-21 20:51:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 709 transitions. [2021-05-21 20:51:19,850 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 709 transitions. Word has length 19 [2021-05-21 20:51:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,850 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 709 transitions. [2021-05-21 20:51:19,850 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) [2021-05-21 20:51:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 709 transitions. [2021-05-21 20:51:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669 [2021-05-21 20:51:19,851 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2138427743, now seen corresponding path program 59 times [2021-05-21 20:51:19,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39325815] [2021-05-21 20:51:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:19,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39325815] [2021-05-21 20:51:19,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39325815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:19,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:19,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:19,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926068445] [2021-05-21 20:51:19,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:19,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:19,881 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) [2021-05-21 20:51:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:19,985 INFO L93 Difference]: Finished difference Result 329 states and 951 transitions. [2021-05-21 20:51:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:19,985 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 [2021-05-21 20:51:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:19,986 INFO L225 Difference]: With dead ends: 329 [2021-05-21 20:51:19,986 INFO L226 Difference]: Without dead ends: 323 [2021-05-21 20:51:19,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-21 20:51:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-05-21 20:51:19,988 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) [2021-05-21 20:51:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 723 transitions. [2021-05-21 20:51:19,988 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 723 transitions. Word has length 19 [2021-05-21 20:51:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:19,988 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 723 transitions. [2021-05-21 20:51:19,988 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) [2021-05-21 20:51:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 723 transitions. [2021-05-21 20:51:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:19,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:19,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:19,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670 [2021-05-21 20:51:19,989 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1867918051, now seen corresponding path program 60 times [2021-05-21 20:51:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:19,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697485] [2021-05-21 20:51:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697485] [2021-05-21 20:51:20,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:20,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:20,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:20,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285760938] [2021-05-21 20:51:20,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:20,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:20,024 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) [2021-05-21 20:51:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,129 INFO L93 Difference]: Finished difference Result 294 states and 876 transitions. [2021-05-21 20:51:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,129 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 [2021-05-21 20:51:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,130 INFO L225 Difference]: With dead ends: 294 [2021-05-21 20:51:20,130 INFO L226 Difference]: Without dead ends: 294 [2021-05-21 20:51:20,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-21 20:51:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 217. [2021-05-21 20:51:20,132 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) [2021-05-21 20:51:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 650 transitions. [2021-05-21 20:51:20,132 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 650 transitions. Word has length 19 [2021-05-21 20:51:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,132 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 650 transitions. [2021-05-21 20:51:20,132 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) [2021-05-21 20:51:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 650 transitions. [2021-05-21 20:51:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,133 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:20,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671 [2021-05-21 20:51:20,133 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1028896921, now seen corresponding path program 61 times [2021-05-21 20:51:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:20,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110518049] [2021-05-21 20:51:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110518049] [2021-05-21 20:51:20,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110518049] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:20,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:20,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:20,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455592739] [2021-05-21 20:51:20,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:20,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:20,159 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) [2021-05-21 20:51:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,223 INFO L93 Difference]: Finished difference Result 362 states and 1019 transitions. [2021-05-21 20:51:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,223 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 [2021-05-21 20:51:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,223 INFO L225 Difference]: With dead ends: 362 [2021-05-21 20:51:20,223 INFO L226 Difference]: Without dead ends: 346 [2021-05-21 20:51:20,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-21 20:51:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 219. [2021-05-21 20:51:20,226 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) [2021-05-21 20:51:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 653 transitions. [2021-05-21 20:51:20,226 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 653 transitions. Word has length 19 [2021-05-21 20:51:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,226 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 653 transitions. [2021-05-21 20:51:20,226 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) [2021-05-21 20:51:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 653 transitions. [2021-05-21 20:51:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:20,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672 [2021-05-21 20:51:20,227 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash 493077425, now seen corresponding path program 62 times [2021-05-21 20:51:20,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:20,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303362217] [2021-05-21 20:51:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303362217] [2021-05-21 20:51:20,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303362217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:20,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:20,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:20,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127768547] [2021-05-21 20:51:20,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:20,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:20,261 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) [2021-05-21 20:51:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,347 INFO L93 Difference]: Finished difference Result 391 states and 1075 transitions. [2021-05-21 20:51:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,348 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 [2021-05-21 20:51:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,348 INFO L225 Difference]: With dead ends: 391 [2021-05-21 20:51:20,348 INFO L226 Difference]: Without dead ends: 383 [2021-05-21 20:51:20,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-21 20:51:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 231. [2021-05-21 20:51:20,351 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) [2021-05-21 20:51:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-05-21 20:51:20,351 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-05-21 20:51:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,351 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-05-21 20:51:20,351 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) [2021-05-21 20:51:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-05-21 20:51:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:20,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673 [2021-05-21 20:51:20,352 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:20,352 INFO L82 PathProgramCache]: Analyzing trace with hash 873815065, now seen corresponding path program 63 times [2021-05-21 20:51:20,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:20,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898199591] [2021-05-21 20:51:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898199591] [2021-05-21 20:51:20,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898199591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:20,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:20,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:20,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166739845] [2021-05-21 20:51:20,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:20,381 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) [2021-05-21 20:51:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,461 INFO L93 Difference]: Finished difference Result 354 states and 997 transitions. [2021-05-21 20:51:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,461 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 [2021-05-21 20:51:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,462 INFO L225 Difference]: With dead ends: 354 [2021-05-21 20:51:20,462 INFO L226 Difference]: Without dead ends: 344 [2021-05-21 20:51:20,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-21 20:51:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 217. [2021-05-21 20:51:20,465 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) [2021-05-21 20:51:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-05-21 20:51:20,465 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-05-21 20:51:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,465 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-05-21 20:51:20,465 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) [2021-05-21 20:51:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-05-21 20:51:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,466 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:20,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674 [2021-05-21 20:51:20,466 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1196865479, now seen corresponding path program 64 times [2021-05-21 20:51:20,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:20,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955197308] [2021-05-21 20:51:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955197308] [2021-05-21 20:51:20,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955197308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:20,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:20,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:20,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696541288] [2021-05-21 20:51:20,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:20,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:20,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:20,495 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) [2021-05-21 20:51:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,576 INFO L93 Difference]: Finished difference Result 397 states and 1090 transitions. [2021-05-21 20:51:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,577 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 [2021-05-21 20:51:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,577 INFO L225 Difference]: With dead ends: 397 [2021-05-21 20:51:20,577 INFO L226 Difference]: Without dead ends: 389 [2021-05-21 20:51:20,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-21 20:51:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 233. [2021-05-21 20:51:20,581 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) [2021-05-21 20:51:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 690 transitions. [2021-05-21 20:51:20,581 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 690 transitions. Word has length 19 [2021-05-21 20:51:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,581 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 690 transitions. [2021-05-21 20:51:20,581 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) [2021-05-21 20:51:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 690 transitions. [2021-05-21 20:51:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:20,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable675 [2021-05-21 20:51:20,582 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash -816127839, now seen corresponding path program 65 times [2021-05-21 20:51:20,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:20,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880325769] [2021-05-21 20:51:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880325769] [2021-05-21 20:51:20,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880325769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:20,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:20,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:20,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964678580] [2021-05-21 20:51:20,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:20,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:20,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:20,610 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) [2021-05-21 20:51:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,696 INFO L93 Difference]: Finished difference Result 395 states and 1085 transitions. [2021-05-21 20:51:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,696 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 [2021-05-21 20:51:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,697 INFO L225 Difference]: With dead ends: 395 [2021-05-21 20:51:20,697 INFO L226 Difference]: Without dead ends: 387 [2021-05-21 20:51:20,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-21 20:51:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 231. [2021-05-21 20:51:20,700 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) [2021-05-21 20:51:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-05-21 20:51:20,700 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-05-21 20:51:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,700 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-05-21 20:51:20,700 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) [2021-05-21 20:51:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-05-21 20:51:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:20,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676 [2021-05-21 20:51:20,701 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:20,701 INFO L82 PathProgramCache]: Analyzing trace with hash -218791181, now seen corresponding path program 66 times [2021-05-21 20:51:20,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:20,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48522181] [2021-05-21 20:51:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48522181] [2021-05-21 20:51:20,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48522181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:20,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:20,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:20,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132333287] [2021-05-21 20:51:20,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:20,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:20,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:20,727 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) [2021-05-21 20:51:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,790 INFO L93 Difference]: Finished difference Result 358 states and 1005 transitions. [2021-05-21 20:51:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,790 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 [2021-05-21 20:51:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,791 INFO L225 Difference]: With dead ends: 358 [2021-05-21 20:51:20,791 INFO L226 Difference]: Without dead ends: 342 [2021-05-21 20:51:20,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-21 20:51:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 215. [2021-05-21 20:51:20,793 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) [2021-05-21 20:51:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-21 20:51:20,793 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-21 20:51:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,793 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-21 20:51:20,793 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) [2021-05-21 20:51:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-21 20:51:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,794 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:20,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677 [2021-05-21 20:51:20,794 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:20,794 INFO L82 PathProgramCache]: Analyzing trace with hash 313632770, now seen corresponding path program 61 times [2021-05-21 20:51:20,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:20,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703085621] [2021-05-21 20:51:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:20,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703085621] [2021-05-21 20:51:20,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703085621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:20,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645170593] [2021-05-21 20:51:20,827 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 [2021-05-21 20:51:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:20,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:20,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:20,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645170593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:20,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:20,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:51:20,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582114300] [2021-05-21 20:51:20,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:51:20,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:20,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:51:20,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:20,894 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) [2021-05-21 20:51:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:20,976 INFO L93 Difference]: Finished difference Result 390 states and 1140 transitions. [2021-05-21 20:51:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:20,976 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 [2021-05-21 20:51:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:20,977 INFO L225 Difference]: With dead ends: 390 [2021-05-21 20:51:20,977 INFO L226 Difference]: Without dead ends: 390 [2021-05-21 20:51:20,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-21 20:51:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 218. [2021-05-21 20:51:20,980 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) [2021-05-21 20:51:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 653 transitions. [2021-05-21 20:51:20,981 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 653 transitions. Word has length 19 [2021-05-21 20:51:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:20,981 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 653 transitions. [2021-05-21 20:51:20,981 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) [2021-05-21 20:51:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 653 transitions. [2021-05-21 20:51:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:20,981 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:20,981 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:21,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-05-21 20:51:21,182 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 157800938, now seen corresponding path program 62 times [2021-05-21 20:51:21,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:21,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614966798] [2021-05-21 20:51:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:21,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:21,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614966798] [2021-05-21 20:51:21,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614966798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:21,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949141924] [2021-05-21 20:51:21,211 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 [2021-05-21 20:51:21,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:21,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:21,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:21,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949141924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:21,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:21,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:21,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736164070] [2021-05-21 20:51:21,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:21,282 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) [2021-05-21 20:51:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:21,369 INFO L93 Difference]: Finished difference Result 453 states and 1308 transitions. [2021-05-21 20:51:21,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:21,369 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 [2021-05-21 20:51:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:21,370 INFO L225 Difference]: With dead ends: 453 [2021-05-21 20:51:21,370 INFO L226 Difference]: Without dead ends: 453 [2021-05-21 20:51:21,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-21 20:51:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 221. [2021-05-21 20:51:21,372 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) [2021-05-21 20:51:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 665 transitions. [2021-05-21 20:51:21,373 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 665 transitions. Word has length 19 [2021-05-21 20:51:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:21,373 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 665 transitions. [2021-05-21 20:51:21,373 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) [2021-05-21 20:51:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 665 transitions. [2021-05-21 20:51:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:21,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:21,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:21,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:21,574 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1087962114, now seen corresponding path program 63 times [2021-05-21 20:51:21,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:21,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660549296] [2021-05-21 20:51:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:21,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:21,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660549296] [2021-05-21 20:51:21,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660549296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:21,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711846580] [2021-05-21 20:51:21,598 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 [2021-05-21 20:51:21,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:21,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711846580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:21,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:21,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:21,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402224385] [2021-05-21 20:51:21,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:21,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:21,667 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) [2021-05-21 20:51:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:21,759 INFO L93 Difference]: Finished difference Result 399 states and 1161 transitions. [2021-05-21 20:51:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:21,759 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 [2021-05-21 20:51:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:21,760 INFO L225 Difference]: With dead ends: 399 [2021-05-21 20:51:21,760 INFO L226 Difference]: Without dead ends: 393 [2021-05-21 20:51:21,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-21 20:51:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 215. [2021-05-21 20:51:21,762 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) [2021-05-21 20:51:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-21 20:51:21,763 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-21 20:51:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:21,763 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-21 20:51:21,763 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) [2021-05-21 20:51:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-21 20:51:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:21,763 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:21,763 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:21,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:21,964 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:21,964 INFO L82 PathProgramCache]: Analyzing trace with hash -727997342, now seen corresponding path program 64 times [2021-05-21 20:51:21,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:21,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215523526] [2021-05-21 20:51:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:21,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:21,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215523526] [2021-05-21 20:51:21,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215523526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137587708] [2021-05-21 20:51:21,996 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 [2021-05-21 20:51:22,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:22,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:22,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:22,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137587708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:22,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:22,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441533746] [2021-05-21 20:51:22,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:22,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:22,077 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) [2021-05-21 20:51:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:22,169 INFO L93 Difference]: Finished difference Result 423 states and 1218 transitions. [2021-05-21 20:51:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:22,170 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 [2021-05-21 20:51:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:22,170 INFO L225 Difference]: With dead ends: 423 [2021-05-21 20:51:22,170 INFO L226 Difference]: Without dead ends: 423 [2021-05-21 20:51:22,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-21 20:51:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 221. [2021-05-21 20:51:22,173 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) [2021-05-21 20:51:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 668 transitions. [2021-05-21 20:51:22,173 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 668 transitions. Word has length 19 [2021-05-21 20:51:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:22,173 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 668 transitions. [2021-05-21 20:51:22,173 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) [2021-05-21 20:51:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 668 transitions. [2021-05-21 20:51:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:22,174 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:22,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:22,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-05-21 20:51:22,374 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:22,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash 202163834, now seen corresponding path program 65 times [2021-05-21 20:51:22,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:22,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460263310] [2021-05-21 20:51:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:22,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460263310] [2021-05-21 20:51:22,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460263310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133365123] [2021-05-21 20:51:22,400 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 [2021-05-21 20:51:22,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:22,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:22,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:22,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133365123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:22,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:22,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:22,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338640652] [2021-05-21 20:51:22,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:22,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:22,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:22,478 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) [2021-05-21 20:51:22,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:22,563 INFO L93 Difference]: Finished difference Result 429 states and 1227 transitions. [2021-05-21 20:51:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:22,563 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 [2021-05-21 20:51:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:22,564 INFO L225 Difference]: With dead ends: 429 [2021-05-21 20:51:22,564 INFO L226 Difference]: Without dead ends: 423 [2021-05-21 20:51:22,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-21 20:51:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 218. [2021-05-21 20:51:22,567 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) [2021-05-21 20:51:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 656 transitions. [2021-05-21 20:51:22,567 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 656 transitions. Word has length 19 [2021-05-21 20:51:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:22,567 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 656 transitions. [2021-05-21 20:51:22,567 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) [2021-05-21 20:51:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 656 transitions. [2021-05-21 20:51:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:22,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:22,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:22,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-05-21 20:51:22,768 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:22,768 INFO L82 PathProgramCache]: Analyzing trace with hash -810528698, now seen corresponding path program 66 times [2021-05-21 20:51:22,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:22,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216063511] [2021-05-21 20:51:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:22,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:22,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216063511] [2021-05-21 20:51:22,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216063511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:22,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808454311] [2021-05-21 20:51:22,791 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 [2021-05-21 20:51:22,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:22,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:22,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808454311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:22,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:22,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:22,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222646610] [2021-05-21 20:51:22,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:22,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:22,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:22,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:22,879 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) [2021-05-21 20:51:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:22,953 INFO L93 Difference]: Finished difference Result 378 states and 1095 transitions. [2021-05-21 20:51:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:22,953 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 [2021-05-21 20:51:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:22,954 INFO L225 Difference]: With dead ends: 378 [2021-05-21 20:51:22,954 INFO L226 Difference]: Without dead ends: 366 [2021-05-21 20:51:22,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-21 20:51:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 215. [2021-05-21 20:51:22,956 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) [2021-05-21 20:51:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-21 20:51:22,956 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-21 20:51:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:22,957 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-21 20:51:22,957 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) [2021-05-21 20:51:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-21 20:51:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:22,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:22,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:23,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-05-21 20:51:23,157 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1177425635, now seen corresponding path program 67 times [2021-05-21 20:51:23,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:23,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661616443] [2021-05-21 20:51:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:23,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:23,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661616443] [2021-05-21 20:51:23,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661616443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:23,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:23,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:23,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867162434] [2021-05-21 20:51:23,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:23,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:23,185 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) [2021-05-21 20:51:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:23,250 INFO L93 Difference]: Finished difference Result 416 states and 1156 transitions. [2021-05-21 20:51:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:23,250 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 [2021-05-21 20:51:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:23,251 INFO L225 Difference]: With dead ends: 416 [2021-05-21 20:51:23,251 INFO L226 Difference]: Without dead ends: 400 [2021-05-21 20:51:23,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-21 20:51:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 219. [2021-05-21 20:51:23,255 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) [2021-05-21 20:51:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 652 transitions. [2021-05-21 20:51:23,255 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 652 transitions. Word has length 19 [2021-05-21 20:51:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:23,255 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 652 transitions. [2021-05-21 20:51:23,255 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) [2021-05-21 20:51:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 652 transitions. [2021-05-21 20:51:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:23,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:23,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:23,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690 [2021-05-21 20:51:23,256 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1713245131, now seen corresponding path program 68 times [2021-05-21 20:51:23,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:23,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084471683] [2021-05-21 20:51:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:23,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084471683] [2021-05-21 20:51:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084471683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:23,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:23,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:23,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653297365] [2021-05-21 20:51:23,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:23,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:23,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:23,289 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) [2021-05-21 20:51:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:23,368 INFO L93 Difference]: Finished difference Result 445 states and 1210 transitions. [2021-05-21 20:51:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:23,368 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 [2021-05-21 20:51:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:23,369 INFO L225 Difference]: With dead ends: 445 [2021-05-21 20:51:23,369 INFO L226 Difference]: Without dead ends: 437 [2021-05-21 20:51:23,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-21 20:51:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 235. [2021-05-21 20:51:23,371 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) [2021-05-21 20:51:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 696 transitions. [2021-05-21 20:51:23,372 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 696 transitions. Word has length 19 [2021-05-21 20:51:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:23,372 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 696 transitions. [2021-05-21 20:51:23,372 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) [2021-05-21 20:51:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 696 transitions. [2021-05-21 20:51:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:23,372 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:23,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:23,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691 [2021-05-21 20:51:23,372 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1332507491, now seen corresponding path program 69 times [2021-05-21 20:51:23,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:23,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131307118] [2021-05-21 20:51:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:23,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:23,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131307118] [2021-05-21 20:51:23,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131307118] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:23,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:23,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:23,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220343299] [2021-05-21 20:51:23,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:23,401 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) [2021-05-21 20:51:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:23,472 INFO L93 Difference]: Finished difference Result 408 states and 1124 transitions. [2021-05-21 20:51:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:23,472 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 [2021-05-21 20:51:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:23,473 INFO L225 Difference]: With dead ends: 408 [2021-05-21 20:51:23,473 INFO L226 Difference]: Without dead ends: 398 [2021-05-21 20:51:23,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-21 20:51:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 225. [2021-05-21 20:51:23,475 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) [2021-05-21 20:51:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-05-21 20:51:23,476 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-05-21 20:51:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:23,476 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-05-21 20:51:23,476 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) [2021-05-21 20:51:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-05-21 20:51:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:23,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:23,476 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:23,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692 [2021-05-21 20:51:23,476 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:23,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1162202982, now seen corresponding path program 67 times [2021-05-21 20:51:23,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:23,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969013657] [2021-05-21 20:51:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:23,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:23,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969013657] [2021-05-21 20:51:23,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969013657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:23,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558909940] [2021-05-21 20:51:23,505 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 [2021-05-21 20:51:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:23,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558909940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:23,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:23,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:51:23,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709684547] [2021-05-21 20:51:23,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:51:23,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:51:23,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:23,570 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) [2021-05-21 20:51:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:23,661 INFO L93 Difference]: Finished difference Result 510 states and 1495 transitions. [2021-05-21 20:51:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:23,662 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 [2021-05-21 20:51:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:23,662 INFO L225 Difference]: With dead ends: 510 [2021-05-21 20:51:23,662 INFO L226 Difference]: Without dead ends: 510 [2021-05-21 20:51:23,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-05-21 20:51:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 225. [2021-05-21 20:51:23,665 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) [2021-05-21 20:51:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-05-21 20:51:23,666 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-05-21 20:51:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:23,666 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-05-21 20:51:23,666 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) [2021-05-21 20:51:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-05-21 20:51:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:23,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:23,666 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:23,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:23,867 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1006371150, now seen corresponding path program 68 times [2021-05-21 20:51:23,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:23,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268951824] [2021-05-21 20:51:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:23,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:23,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268951824] [2021-05-21 20:51:23,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268951824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:23,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213942730] [2021-05-21 20:51:23,896 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 [2021-05-21 20:51:23,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:23,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:23,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:23,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213942730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:23,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:23,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:23,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593543903] [2021-05-21 20:51:23,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:23,965 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) [2021-05-21 20:51:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:24,049 INFO L93 Difference]: Finished difference Result 528 states and 1528 transitions. [2021-05-21 20:51:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:24,049 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 [2021-05-21 20:51:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:24,050 INFO L225 Difference]: With dead ends: 528 [2021-05-21 20:51:24,050 INFO L226 Difference]: Without dead ends: 528 [2021-05-21 20:51:24,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-05-21 20:51:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 231. [2021-05-21 20:51:24,053 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) [2021-05-21 20:51:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 695 transitions. [2021-05-21 20:51:24,053 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 695 transitions. Word has length 19 [2021-05-21 20:51:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:24,053 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 695 transitions. [2021-05-21 20:51:24,053 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) [2021-05-21 20:51:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 695 transitions. [2021-05-21 20:51:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:24,053 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:24,053 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:24,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable694,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:24,254 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1936532326, now seen corresponding path program 69 times [2021-05-21 20:51:24,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:24,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486430006] [2021-05-21 20:51:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:24,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:24,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486430006] [2021-05-21 20:51:24,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486430006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:24,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269565314] [2021-05-21 20:51:24,292 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 [2021-05-21 20:51:24,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:24,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:24,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269565314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:24,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:24,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:24,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837331999] [2021-05-21 20:51:24,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:24,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:24,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:24,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:24,360 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) [2021-05-21 20:51:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:24,438 INFO L93 Difference]: Finished difference Result 474 states and 1375 transitions. [2021-05-21 20:51:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:24,438 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 [2021-05-21 20:51:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:24,439 INFO L225 Difference]: With dead ends: 474 [2021-05-21 20:51:24,439 INFO L226 Difference]: Without dead ends: 468 [2021-05-21 20:51:24,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-21 20:51:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 227. [2021-05-21 20:51:24,441 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) [2021-05-21 20:51:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 681 transitions. [2021-05-21 20:51:24,442 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 681 transitions. Word has length 19 [2021-05-21 20:51:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:24,442 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 681 transitions. [2021-05-21 20:51:24,442 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) [2021-05-21 20:51:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 681 transitions. [2021-05-21 20:51:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:24,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:24,442 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:24,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-05-21 20:51:24,643 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1084350617, now seen corresponding path program 70 times [2021-05-21 20:51:24,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:24,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064488748] [2021-05-21 20:51:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:24,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:24,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064488748] [2021-05-21 20:51:24,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064488748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:24,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134881762] [2021-05-21 20:51:24,673 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 [2021-05-21 20:51:24,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:24,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:24,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:24,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134881762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:24,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:24,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683468976] [2021-05-21 20:51:24,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:24,749 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) [2021-05-21 20:51:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:24,822 INFO L93 Difference]: Finished difference Result 367 states and 1041 transitions. [2021-05-21 20:51:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:24,822 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 [2021-05-21 20:51:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:24,822 INFO L225 Difference]: With dead ends: 367 [2021-05-21 20:51:24,823 INFO L226 Difference]: Without dead ends: 351 [2021-05-21 20:51:24,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-21 20:51:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 221. [2021-05-21 20:51:24,825 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) [2021-05-21 20:51:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 660 transitions. [2021-05-21 20:51:24,825 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 660 transitions. Word has length 19 [2021-05-21 20:51:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:24,825 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 660 transitions. [2021-05-21 20:51:24,825 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) [2021-05-21 20:51:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 660 transitions. [2021-05-21 20:51:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:24,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:24,826 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:25,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable698,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:25,026 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1215342274, now seen corresponding path program 70 times [2021-05-21 20:51:25,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:25,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154262537] [2021-05-21 20:51:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:25,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:25,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154262537] [2021-05-21 20:51:25,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154262537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:25,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400879569] [2021-05-21 20:51:25,054 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 [2021-05-21 20:51:25,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:25,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:25,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:25,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400879569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:25,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:25,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:51:25,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809137850] [2021-05-21 20:51:25,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:51:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:51:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:25,134 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) [2021-05-21 20:51:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:25,223 INFO L93 Difference]: Finished difference Result 404 states and 1187 transitions. [2021-05-21 20:51:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:25,224 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 [2021-05-21 20:51:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:25,224 INFO L225 Difference]: With dead ends: 404 [2021-05-21 20:51:25,224 INFO L226 Difference]: Without dead ends: 404 [2021-05-21 20:51:25,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-21 20:51:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 200. [2021-05-21 20:51:25,227 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) [2021-05-21 20:51:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 594 transitions. [2021-05-21 20:51:25,228 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 594 transitions. Word has length 19 [2021-05-21 20:51:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:25,228 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 594 transitions. [2021-05-21 20:51:25,228 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) [2021-05-21 20:51:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 594 transitions. [2021-05-21 20:51:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:25,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:25,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:25,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-05-21 20:51:25,445 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1597715687, now seen corresponding path program 71 times [2021-05-21 20:51:25,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:25,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152137321] [2021-05-21 20:51:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:25,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152137321] [2021-05-21 20:51:25,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152137321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284569907] [2021-05-21 20:51:25,474 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 [2021-05-21 20:51:25,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:25,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:25,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:25,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284569907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:25,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:25,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:25,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172317473] [2021-05-21 20:51:25,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:25,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:25,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:25,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:25,559 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) [2021-05-21 20:51:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:25,653 INFO L93 Difference]: Finished difference Result 356 states and 1020 transitions. [2021-05-21 20:51:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:25,653 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 [2021-05-21 20:51:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:25,654 INFO L225 Difference]: With dead ends: 356 [2021-05-21 20:51:25,654 INFO L226 Difference]: Without dead ends: 348 [2021-05-21 20:51:25,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-21 20:51:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 216. [2021-05-21 20:51:25,656 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) [2021-05-21 20:51:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-05-21 20:51:25,656 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-05-21 20:51:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:25,657 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-05-21 20:51:25,657 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) [2021-05-21 20:51:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-05-21 20:51:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:25,657 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:25,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:25,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:25,857 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1565768734, now seen corresponding path program 71 times [2021-05-21 20:51:25,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:25,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695855168] [2021-05-21 20:51:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:25,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695855168] [2021-05-21 20:51:25,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695855168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126364173] [2021-05-21 20:51:25,886 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 [2021-05-21 20:51:25,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126364173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:25,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:25,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:25,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028411639] [2021-05-21 20:51:25,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:25,960 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) [2021-05-21 20:51:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:26,048 INFO L93 Difference]: Finished difference Result 393 states and 1145 transitions. [2021-05-21 20:51:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:26,049 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 [2021-05-21 20:51:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:26,049 INFO L225 Difference]: With dead ends: 393 [2021-05-21 20:51:26,049 INFO L226 Difference]: Without dead ends: 393 [2021-05-21 20:51:26,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-21 20:51:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-05-21 20:51:26,051 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) [2021-05-21 20:51:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-05-21 20:51:26,052 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-05-21 20:51:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:26,052 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-05-21 20:51:26,052 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) [2021-05-21 20:51:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-05-21 20:51:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:26,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:26,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:26,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-05-21 20:51:26,253 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 857230482, now seen corresponding path program 72 times [2021-05-21 20:51:26,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:26,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793857051] [2021-05-21 20:51:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:26,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:26,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793857051] [2021-05-21 20:51:26,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793857051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:26,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436677486] [2021-05-21 20:51:26,279 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 [2021-05-21 20:51:26,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:26,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:26,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:26,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436677486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:26,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:26,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:51:26,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044960598] [2021-05-21 20:51:26,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:26,365 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) [2021-05-21 20:51:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:26,440 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-05-21 20:51:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:26,441 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 [2021-05-21 20:51:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:26,441 INFO L225 Difference]: With dead ends: 339 [2021-05-21 20:51:26,441 INFO L226 Difference]: Without dead ends: 330 [2021-05-21 20:51:26,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-21 20:51:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 216. [2021-05-21 20:51:26,443 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) [2021-05-21 20:51:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 646 transitions. [2021-05-21 20:51:26,444 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 646 transitions. Word has length 19 [2021-05-21 20:51:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:26,444 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 646 transitions. [2021-05-21 20:51:26,444 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) [2021-05-21 20:51:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 646 transitions. [2021-05-21 20:51:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:26,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:26,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:26,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:26,645 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:26,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1118431011, now seen corresponding path program 72 times [2021-05-21 20:51:26,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:26,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569555883] [2021-05-21 20:51:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:26,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:26,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569555883] [2021-05-21 20:51:26,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569555883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:26,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215399862] [2021-05-21 20:51:26,680 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 [2021-05-21 20:51:26,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215399862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:26,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:26,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:26,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353305609] [2021-05-21 20:51:26,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:26,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:26,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:26,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:26,766 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) [2021-05-21 20:51:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:26,869 INFO L93 Difference]: Finished difference Result 310 states and 907 transitions. [2021-05-21 20:51:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:26,870 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 [2021-05-21 20:51:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:26,870 INFO L225 Difference]: With dead ends: 310 [2021-05-21 20:51:26,870 INFO L226 Difference]: Without dead ends: 310 [2021-05-21 20:51:26,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-21 20:51:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 196. [2021-05-21 20:51:26,872 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) [2021-05-21 20:51:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 582 transitions. [2021-05-21 20:51:26,872 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 582 transitions. Word has length 19 [2021-05-21 20:51:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:26,872 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 582 transitions. [2021-05-21 20:51:26,872 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) [2021-05-21 20:51:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 582 transitions. [2021-05-21 20:51:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:26,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:26,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:27,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:27,073 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -720751567, now seen corresponding path program 73 times [2021-05-21 20:51:27,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:27,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029101116] [2021-05-21 20:51:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:27,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:27,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029101116] [2021-05-21 20:51:27,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029101116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:27,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:27,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578980815] [2021-05-21 20:51:27,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:27,102 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) [2021-05-21 20:51:27,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:27,182 INFO L93 Difference]: Finished difference Result 415 states and 1176 transitions. [2021-05-21 20:51:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:27,182 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 [2021-05-21 20:51:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:27,182 INFO L225 Difference]: With dead ends: 415 [2021-05-21 20:51:27,182 INFO L226 Difference]: Without dead ends: 407 [2021-05-21 20:51:27,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-21 20:51:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 216. [2021-05-21 20:51:27,185 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) [2021-05-21 20:51:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-05-21 20:51:27,185 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-05-21 20:51:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:27,185 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-05-21 20:51:27,185 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) [2021-05-21 20:51:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-05-21 20:51:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:27,186 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:27,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:27,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710 [2021-05-21 20:51:27,186 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash -340013927, now seen corresponding path program 74 times [2021-05-21 20:51:27,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:27,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246139526] [2021-05-21 20:51:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:27,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:27,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246139526] [2021-05-21 20:51:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246139526] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:27,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:27,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:27,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887591550] [2021-05-21 20:51:27,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:27,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:27,215 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) [2021-05-21 20:51:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:27,295 INFO L93 Difference]: Finished difference Result 421 states and 1191 transitions. [2021-05-21 20:51:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:27,295 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 [2021-05-21 20:51:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:27,295 INFO L225 Difference]: With dead ends: 421 [2021-05-21 20:51:27,295 INFO L226 Difference]: Without dead ends: 413 [2021-05-21 20:51:27,295 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 [2021-05-21 20:51:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-21 20:51:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 220. [2021-05-21 20:51:27,298 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) [2021-05-21 20:51:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 657 transitions. [2021-05-21 20:51:27,298 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 657 transitions. Word has length 19 [2021-05-21 20:51:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:27,298 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 657 transitions. [2021-05-21 20:51:27,298 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) [2021-05-21 20:51:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 657 transitions. [2021-05-21 20:51:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:27,299 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:27,299 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:27,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711 [2021-05-21 20:51:27,299 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:27,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1211611362, now seen corresponding path program 73 times [2021-05-21 20:51:27,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:27,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811731921] [2021-05-21 20:51:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:27,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:27,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811731921] [2021-05-21 20:51:27,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811731921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:27,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63094541] [2021-05-21 20:51:27,330 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 [2021-05-21 20:51:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:27,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:27,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:27,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63094541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:27,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:27,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:27,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123581064] [2021-05-21 20:51:27,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:27,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:27,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:27,413 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) [2021-05-21 20:51:27,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:27,515 INFO L93 Difference]: Finished difference Result 479 states and 1393 transitions. [2021-05-21 20:51:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:27,515 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 [2021-05-21 20:51:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:27,515 INFO L225 Difference]: With dead ends: 479 [2021-05-21 20:51:27,515 INFO L226 Difference]: Without dead ends: 479 [2021-05-21 20:51:27,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-21 20:51:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 226. [2021-05-21 20:51:27,518 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) [2021-05-21 20:51:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 684 transitions. [2021-05-21 20:51:27,519 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 684 transitions. Word has length 19 [2021-05-21 20:51:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:27,519 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 684 transitions. [2021-05-21 20:51:27,519 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) [2021-05-21 20:51:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 684 transitions. [2021-05-21 20:51:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:27,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:27,519 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:27,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-05-21 20:51:27,720 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2141772538, now seen corresponding path program 74 times [2021-05-21 20:51:27,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:27,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526249600] [2021-05-21 20:51:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:27,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:27,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526249600] [2021-05-21 20:51:27,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526249600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:27,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504631012] [2021-05-21 20:51:27,747 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 [2021-05-21 20:51:27,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:27,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:27,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:27,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504631012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:27,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:27,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:27,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373638802] [2021-05-21 20:51:27,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:27,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:27,826 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) [2021-05-21 20:51:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:27,910 INFO L93 Difference]: Finished difference Result 461 states and 1324 transitions. [2021-05-21 20:51:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:27,910 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 [2021-05-21 20:51:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:27,911 INFO L225 Difference]: With dead ends: 461 [2021-05-21 20:51:27,911 INFO L226 Difference]: Without dead ends: 455 [2021-05-21 20:51:27,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-05-21 20:51:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 225. [2021-05-21 20:51:27,914 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) [2021-05-21 20:51:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 679 transitions. [2021-05-21 20:51:27,914 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 679 transitions. Word has length 19 [2021-05-21 20:51:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:27,914 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 679 transitions. [2021-05-21 20:51:27,914 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) [2021-05-21 20:51:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 679 transitions. [2021-05-21 20:51:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:27,914 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:27,915 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:28,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:28,115 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash -924885707, now seen corresponding path program 75 times [2021-05-21 20:51:28,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:28,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134764970] [2021-05-21 20:51:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:28,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:28,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134764970] [2021-05-21 20:51:28,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134764970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:28,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720808504] [2021-05-21 20:51:28,146 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 [2021-05-21 20:51:28,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:28,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720808504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:28,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:28,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:28,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307021361] [2021-05-21 20:51:28,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:28,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:28,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:28,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:28,234 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) [2021-05-21 20:51:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:28,316 INFO L93 Difference]: Finished difference Result 439 states and 1238 transitions. [2021-05-21 20:51:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:28,317 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 [2021-05-21 20:51:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:28,317 INFO L225 Difference]: With dead ends: 439 [2021-05-21 20:51:28,317 INFO L226 Difference]: Without dead ends: 431 [2021-05-21 20:51:28,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-21 20:51:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 225. [2021-05-21 20:51:28,321 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) [2021-05-21 20:51:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 682 transitions. [2021-05-21 20:51:28,322 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 682 transitions. Word has length 19 [2021-05-21 20:51:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:28,322 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 682 transitions. [2021-05-21 20:51:28,322 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) [2021-05-21 20:51:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 682 transitions. [2021-05-21 20:51:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:28,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:28,322 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:28,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-05-21 20:51:28,537 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1412011018, now seen corresponding path program 75 times [2021-05-21 20:51:28,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:28,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872645918] [2021-05-21 20:51:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:28,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872645918] [2021-05-21 20:51:28,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872645918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341516570] [2021-05-21 20:51:28,568 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 [2021-05-21 20:51:28,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:51:28,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:28,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341516570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:28,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:28,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:28,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815147312] [2021-05-21 20:51:28,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:28,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:28,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:28,645 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) [2021-05-21 20:51:28,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:28,731 INFO L93 Difference]: Finished difference Result 458 states and 1317 transitions. [2021-05-21 20:51:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:28,731 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 [2021-05-21 20:51:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:28,732 INFO L225 Difference]: With dead ends: 458 [2021-05-21 20:51:28,732 INFO L226 Difference]: Without dead ends: 458 [2021-05-21 20:51:28,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-21 20:51:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 216. [2021-05-21 20:51:28,735 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) [2021-05-21 20:51:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 652 transitions. [2021-05-21 20:51:28,735 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 652 transitions. Word has length 19 [2021-05-21 20:51:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:28,735 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 652 transitions. [2021-05-21 20:51:28,735 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) [2021-05-21 20:51:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 652 transitions. [2021-05-21 20:51:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:28,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:28,735 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:28,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:28,936 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:28,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:28,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1330770346, now seen corresponding path program 76 times [2021-05-21 20:51:28,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:28,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865061143] [2021-05-21 20:51:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:28,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:28,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865061143] [2021-05-21 20:51:28,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865061143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:28,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541325581] [2021-05-21 20:51:28,963 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 [2021-05-21 20:51:28,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:28,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:28,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:29,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541325581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:29,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:29,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:29,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030834844] [2021-05-21 20:51:29,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:29,040 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) [2021-05-21 20:51:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:29,137 INFO L93 Difference]: Finished difference Result 413 states and 1189 transitions. [2021-05-21 20:51:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:29,137 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 [2021-05-21 20:51:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:29,137 INFO L225 Difference]: With dead ends: 413 [2021-05-21 20:51:29,137 INFO L226 Difference]: Without dead ends: 404 [2021-05-21 20:51:29,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-21 20:51:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 216. [2021-05-21 20:51:29,140 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) [2021-05-21 20:51:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-05-21 20:51:29,140 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-05-21 20:51:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:29,140 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-05-21 20:51:29,140 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) [2021-05-21 20:51:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-05-21 20:51:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:29,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:29,141 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:29,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:29,341 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash -644891147, now seen corresponding path program 76 times [2021-05-21 20:51:29,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:29,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667766809] [2021-05-21 20:51:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:29,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:29,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667766809] [2021-05-21 20:51:29,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667766809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:29,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264197523] [2021-05-21 20:51:29,374 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 [2021-05-21 20:51:29,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:29,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264197523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:29,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:29,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255277432] [2021-05-21 20:51:29,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:29,465 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) [2021-05-21 20:51:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:29,569 INFO L93 Difference]: Finished difference Result 411 states and 1188 transitions. [2021-05-21 20:51:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:29,569 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 [2021-05-21 20:51:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:29,570 INFO L225 Difference]: With dead ends: 411 [2021-05-21 20:51:29,570 INFO L226 Difference]: Without dead ends: 411 [2021-05-21 20:51:29,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-21 20:51:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 212. [2021-05-21 20:51:29,572 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) [2021-05-21 20:51:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 636 transitions. [2021-05-21 20:51:29,573 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 636 transitions. Word has length 19 [2021-05-21 20:51:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:29,573 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 636 transitions. [2021-05-21 20:51:29,573 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) [2021-05-21 20:51:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 636 transitions. [2021-05-21 20:51:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:29,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:29,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:29,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-05-21 20:51:29,774 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1954614186, now seen corresponding path program 77 times [2021-05-21 20:51:29,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:29,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665387595] [2021-05-21 20:51:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:29,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:29,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665387595] [2021-05-21 20:51:29,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665387595] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:29,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:29,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:29,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565842859] [2021-05-21 20:51:29,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:29,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:29,800 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) [2021-05-21 20:51:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:29,878 INFO L93 Difference]: Finished difference Result 384 states and 1100 transitions. [2021-05-21 20:51:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:29,879 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 [2021-05-21 20:51:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:29,879 INFO L225 Difference]: With dead ends: 384 [2021-05-21 20:51:29,879 INFO L226 Difference]: Without dead ends: 378 [2021-05-21 20:51:29,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-21 20:51:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 222. [2021-05-21 20:51:29,881 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) [2021-05-21 20:51:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 661 transitions. [2021-05-21 20:51:29,882 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 661 transitions. Word has length 19 [2021-05-21 20:51:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:29,882 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 661 transitions. [2021-05-21 20:51:29,882 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) [2021-05-21 20:51:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 661 transitions. [2021-05-21 20:51:29,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:29,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:29,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:29,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724 [2021-05-21 20:51:29,882 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:29,882 INFO L82 PathProgramCache]: Analyzing trace with hash 852700034, now seen corresponding path program 78 times [2021-05-21 20:51:29,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:29,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657775086] [2021-05-21 20:51:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:29,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:29,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657775086] [2021-05-21 20:51:29,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657775086] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:29,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:29,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:29,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178768462] [2021-05-21 20:51:29,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:29,908 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) [2021-05-21 20:51:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:29,979 INFO L93 Difference]: Finished difference Result 348 states and 1017 transitions. [2021-05-21 20:51:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:29,979 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 [2021-05-21 20:51:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:29,980 INFO L225 Difference]: With dead ends: 348 [2021-05-21 20:51:29,980 INFO L226 Difference]: Without dead ends: 337 [2021-05-21 20:51:29,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-21 20:51:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 212. [2021-05-21 20:51:29,982 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) [2021-05-21 20:51:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 635 transitions. [2021-05-21 20:51:29,982 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 635 transitions. Word has length 19 [2021-05-21 20:51:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:29,982 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 635 transitions. [2021-05-21 20:51:29,982 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) [2021-05-21 20:51:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 635 transitions. [2021-05-21 20:51:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:29,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:29,983 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:29,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725 [2021-05-21 20:51:29,983 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1616340899, now seen corresponding path program 77 times [2021-05-21 20:51:29,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:29,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501740905] [2021-05-21 20:51:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501740905] [2021-05-21 20:51:30,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501740905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:30,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:30,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:30,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644197904] [2021-05-21 20:51:30,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:30,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:30,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:30,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:30,014 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) [2021-05-21 20:51:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:30,092 INFO L93 Difference]: Finished difference Result 362 states and 1032 transitions. [2021-05-21 20:51:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:30,092 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 [2021-05-21 20:51:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:30,093 INFO L225 Difference]: With dead ends: 362 [2021-05-21 20:51:30,093 INFO L226 Difference]: Without dead ends: 356 [2021-05-21 20:51:30,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-21 20:51:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 218. [2021-05-21 20:51:30,095 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) [2021-05-21 20:51:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 649 transitions. [2021-05-21 20:51:30,095 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 649 transitions. Word has length 19 [2021-05-21 20:51:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:30,095 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 649 transitions. [2021-05-21 20:51:30,095 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) [2021-05-21 20:51:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 649 transitions. [2021-05-21 20:51:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:30,096 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:30,096 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:30,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726 [2021-05-21 20:51:30,096 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1345831207, now seen corresponding path program 78 times [2021-05-21 20:51:30,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:30,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178460757] [2021-05-21 20:51:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:30,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178460757] [2021-05-21 20:51:30,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178460757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:30,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:30,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:30,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216176659] [2021-05-21 20:51:30,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:30,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:30,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:30,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:30,140 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) [2021-05-21 20:51:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:30,224 INFO L93 Difference]: Finished difference Result 340 states and 995 transitions. [2021-05-21 20:51:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:30,224 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 [2021-05-21 20:51:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:30,225 INFO L225 Difference]: With dead ends: 340 [2021-05-21 20:51:30,225 INFO L226 Difference]: Without dead ends: 340 [2021-05-21 20:51:30,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-21 20:51:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 195. [2021-05-21 20:51:30,227 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) [2021-05-21 20:51:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 579 transitions. [2021-05-21 20:51:30,227 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 579 transitions. Word has length 19 [2021-05-21 20:51:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:30,227 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 579 transitions. [2021-05-21 20:51:30,227 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) [2021-05-21 20:51:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 579 transitions. [2021-05-21 20:51:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:30,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:30,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:30,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727 [2021-05-21 20:51:30,228 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -494336067, now seen corresponding path program 79 times [2021-05-21 20:51:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:30,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645154911] [2021-05-21 20:51:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:30,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645154911] [2021-05-21 20:51:30,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645154911] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:30,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:30,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:30,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696514858] [2021-05-21 20:51:30,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:30,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:30,267 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) [2021-05-21 20:51:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:30,336 INFO L93 Difference]: Finished difference Result 335 states and 937 transitions. [2021-05-21 20:51:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:30,336 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 [2021-05-21 20:51:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:30,337 INFO L225 Difference]: With dead ends: 335 [2021-05-21 20:51:30,337 INFO L226 Difference]: Without dead ends: 327 [2021-05-21 20:51:30,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-21 20:51:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 212. [2021-05-21 20:51:30,339 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) [2021-05-21 20:51:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 626 transitions. [2021-05-21 20:51:30,339 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 626 transitions. Word has length 19 [2021-05-21 20:51:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:30,339 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 626 transitions. [2021-05-21 20:51:30,339 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) [2021-05-21 20:51:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 626 transitions. [2021-05-21 20:51:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:30,339 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:30,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:30,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728 [2021-05-21 20:51:30,340 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash -113598427, now seen corresponding path program 80 times [2021-05-21 20:51:30,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:30,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071434214] [2021-05-21 20:51:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:30,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071434214] [2021-05-21 20:51:30,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071434214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:30,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:30,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:30,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727299106] [2021-05-21 20:51:30,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:30,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:30,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:30,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:30,368 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) [2021-05-21 20:51:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:30,447 INFO L93 Difference]: Finished difference Result 333 states and 932 transitions. [2021-05-21 20:51:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:30,447 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 [2021-05-21 20:51:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:30,447 INFO L225 Difference]: With dead ends: 333 [2021-05-21 20:51:30,447 INFO L226 Difference]: Without dead ends: 325 [2021-05-21 20:51:30,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-21 20:51:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 210. [2021-05-21 20:51:30,450 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) [2021-05-21 20:51:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 619 transitions. [2021-05-21 20:51:30,450 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 619 transitions. Word has length 19 [2021-05-21 20:51:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:30,450 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 619 transitions. [2021-05-21 20:51:30,450 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) [2021-05-21 20:51:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 619 transitions. [2021-05-21 20:51:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:30,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:30,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:30,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729 [2021-05-21 20:51:30,450 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:30,451 INFO L82 PathProgramCache]: Analyzing trace with hash 483738231, now seen corresponding path program 81 times [2021-05-21 20:51:30,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:30,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402790743] [2021-05-21 20:51:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:30,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402790743] [2021-05-21 20:51:30,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402790743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:30,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:30,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:30,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620824224] [2021-05-21 20:51:30,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:30,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:30,476 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) [2021-05-21 20:51:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:30,537 INFO L93 Difference]: Finished difference Result 347 states and 973 transitions. [2021-05-21 20:51:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:30,538 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 [2021-05-21 20:51:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:30,538 INFO L225 Difference]: With dead ends: 347 [2021-05-21 20:51:30,538 INFO L226 Difference]: Without dead ends: 333 [2021-05-21 20:51:30,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-21 20:51:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 208. [2021-05-21 20:51:30,541 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) [2021-05-21 20:51:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-21 20:51:30,541 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-21 20:51:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:30,541 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-21 20:51:30,541 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) [2021-05-21 20:51:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-21 20:51:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:30,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:30,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:30,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable730 [2021-05-21 20:51:30,542 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:30,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1339481934, now seen corresponding path program 79 times [2021-05-21 20:51:30,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:30,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361614165] [2021-05-21 20:51:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:30,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361614165] [2021-05-21 20:51:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361614165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:30,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501072340] [2021-05-21 20:51:30,574 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 [2021-05-21 20:51:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501072340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:30,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:30,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:30,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81751321] [2021-05-21 20:51:30,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:30,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:30,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:30,661 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) [2021-05-21 20:51:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:30,758 INFO L93 Difference]: Finished difference Result 388 states and 1116 transitions. [2021-05-21 20:51:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:30,758 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 [2021-05-21 20:51:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:30,759 INFO L225 Difference]: With dead ends: 388 [2021-05-21 20:51:30,759 INFO L226 Difference]: Without dead ends: 388 [2021-05-21 20:51:30,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-21 20:51:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 214. [2021-05-21 20:51:30,761 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) [2021-05-21 20:51:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 637 transitions. [2021-05-21 20:51:30,761 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 637 transitions. Word has length 19 [2021-05-21 20:51:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:30,761 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 637 transitions. [2021-05-21 20:51:30,761 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) [2021-05-21 20:51:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 637 transitions. [2021-05-21 20:51:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:30,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:30,762 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:30,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable731,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:30,962 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2025324186, now seen corresponding path program 80 times [2021-05-21 20:51:30,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:30,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81124598] [2021-05-21 20:51:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:30,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:30,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81124598] [2021-05-21 20:51:30,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81124598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:30,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140030077] [2021-05-21 20:51:30,991 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 [2021-05-21 20:51:31,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:31,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:31,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:31,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140030077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:31,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:31,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:31,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673085170] [2021-05-21 20:51:31,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:31,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:31,076 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) [2021-05-21 20:51:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:31,156 INFO L93 Difference]: Finished difference Result 382 states and 1089 transitions. [2021-05-21 20:51:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:31,157 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 [2021-05-21 20:51:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:31,157 INFO L225 Difference]: With dead ends: 382 [2021-05-21 20:51:31,157 INFO L226 Difference]: Without dead ends: 376 [2021-05-21 20:51:31,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:51:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-21 20:51:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 211. [2021-05-21 20:51:31,159 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) [2021-05-21 20:51:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 625 transitions. [2021-05-21 20:51:31,160 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 625 transitions. Word has length 19 [2021-05-21 20:51:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:31,160 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 625 transitions. [2021-05-21 20:51:31,160 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) [2021-05-21 20:51:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 625 transitions. [2021-05-21 20:51:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:31,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:31,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:31,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-05-21 20:51:31,361 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1256950578, now seen corresponding path program 81 times [2021-05-21 20:51:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:31,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946518389] [2021-05-21 20:51:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:31,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:31,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946518389] [2021-05-21 20:51:31,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946518389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:31,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080363093] [2021-05-21 20:51:31,387 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 [2021-05-21 20:51:31,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:31,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:31,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:31,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080363093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:31,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:31,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:51:31,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150654463] [2021-05-21 20:51:31,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:51:31,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:31,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:51:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:31,465 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) [2021-05-21 20:51:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:31,543 INFO L93 Difference]: Finished difference Result 370 states and 1047 transitions. [2021-05-21 20:51:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:31,543 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 [2021-05-21 20:51:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:31,544 INFO L225 Difference]: With dead ends: 370 [2021-05-21 20:51:31,544 INFO L226 Difference]: Without dead ends: 358 [2021-05-21 20:51:31,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-21 20:51:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 208. [2021-05-21 20:51:31,546 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) [2021-05-21 20:51:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-21 20:51:31,546 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-21 20:51:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:31,547 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-21 20:51:31,547 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) [2021-05-21 20:51:31,547 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-21 20:51:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:31,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:31,547 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:31,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:31,747 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1258244423, now seen corresponding path program 82 times [2021-05-21 20:51:31,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:31,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767538729] [2021-05-21 20:51:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:31,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:31,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767538729] [2021-05-21 20:51:31,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767538729] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:31,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:31,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:31,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742053975] [2021-05-21 20:51:31,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:31,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:31,776 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) [2021-05-21 20:51:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:31,849 INFO L93 Difference]: Finished difference Result 371 states and 1007 transitions. [2021-05-21 20:51:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:31,850 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 [2021-05-21 20:51:31,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:31,850 INFO L225 Difference]: With dead ends: 371 [2021-05-21 20:51:31,850 INFO L226 Difference]: Without dead ends: 363 [2021-05-21 20:51:31,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-21 20:51:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 218. [2021-05-21 20:51:31,852 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) [2021-05-21 20:51:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 648 transitions. [2021-05-21 20:51:31,853 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 648 transitions. Word has length 19 [2021-05-21 20:51:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:31,853 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 648 transitions. [2021-05-21 20:51:31,853 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) [2021-05-21 20:51:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 648 transitions. [2021-05-21 20:51:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:31,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:31,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:31,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738 [2021-05-21 20:51:31,853 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash -877506783, now seen corresponding path program 83 times [2021-05-21 20:51:31,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:31,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437328323] [2021-05-21 20:51:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:31,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437328323] [2021-05-21 20:51:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437328323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:31,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:31,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:31,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424592565] [2021-05-21 20:51:31,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:31,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:31,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:31,890 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) [2021-05-21 20:51:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:31,965 INFO L93 Difference]: Finished difference Result 377 states and 1022 transitions. [2021-05-21 20:51:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:31,965 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 [2021-05-21 20:51:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:31,965 INFO L225 Difference]: With dead ends: 377 [2021-05-21 20:51:31,965 INFO L226 Difference]: Without dead ends: 369 [2021-05-21 20:51:31,965 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 [2021-05-21 20:51:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-21 20:51:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 220. [2021-05-21 20:51:31,968 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) [2021-05-21 20:51:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 652 transitions. [2021-05-21 20:51:31,968 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 652 transitions. Word has length 19 [2021-05-21 20:51:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:31,968 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 652 transitions. [2021-05-21 20:51:31,968 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) [2021-05-21 20:51:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 652 transitions. [2021-05-21 20:51:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:31,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:31,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:31,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739 [2021-05-21 20:51:31,969 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash 674118506, now seen corresponding path program 82 times [2021-05-21 20:51:31,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:31,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411313371] [2021-05-21 20:51:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:32,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:32,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411313371] [2021-05-21 20:51:32,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411313371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:32,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421844471] [2021-05-21 20:51:32,001 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 [2021-05-21 20:51:32,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:32,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421844471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:32,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:32,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328986915] [2021-05-21 20:51:32,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:32,088 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) [2021-05-21 20:51:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:32,194 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-05-21 20:51:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:32,194 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 [2021-05-21 20:51:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:32,194 INFO L225 Difference]: With dead ends: 433 [2021-05-21 20:51:32,195 INFO L226 Difference]: Without dead ends: 433 [2021-05-21 20:51:32,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-21 20:51:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 226. [2021-05-21 20:51:32,197 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) [2021-05-21 20:51:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 679 transitions. [2021-05-21 20:51:32,197 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 679 transitions. Word has length 19 [2021-05-21 20:51:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:32,197 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 679 transitions. [2021-05-21 20:51:32,197 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) [2021-05-21 20:51:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 679 transitions. [2021-05-21 20:51:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:32,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:32,198 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:32,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-05-21 20:51:32,398 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:32,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1604279682, now seen corresponding path program 83 times [2021-05-21 20:51:32,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:32,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086140488] [2021-05-21 20:51:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:32,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:32,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086140488] [2021-05-21 20:51:32,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086140488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:32,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531462728] [2021-05-21 20:51:32,428 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 [2021-05-21 20:51:32,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:32,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:32,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:32,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:32,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531462728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:32,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:32,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:32,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643386642] [2021-05-21 20:51:32,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:32,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:32,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:32,515 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) [2021-05-21 20:51:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:32,595 INFO L93 Difference]: Finished difference Result 415 states and 1158 transitions. [2021-05-21 20:51:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:32,595 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 [2021-05-21 20:51:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:32,595 INFO L225 Difference]: With dead ends: 415 [2021-05-21 20:51:32,595 INFO L226 Difference]: Without dead ends: 409 [2021-05-21 20:51:32,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-21 20:51:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 225. [2021-05-21 20:51:32,598 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) [2021-05-21 20:51:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 674 transitions. [2021-05-21 20:51:32,598 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 674 transitions. Word has length 19 [2021-05-21 20:51:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:32,598 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 674 transitions. [2021-05-21 20:51:32,598 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) [2021-05-21 20:51:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 674 transitions. [2021-05-21 20:51:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:32,599 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:32,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:32,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-05-21 20:51:32,799 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1462378563, now seen corresponding path program 84 times [2021-05-21 20:51:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:32,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333118795] [2021-05-21 20:51:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:32,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:32,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333118795] [2021-05-21 20:51:32,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333118795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:32,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797933452] [2021-05-21 20:51:32,830 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 [2021-05-21 20:51:32,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:51:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:32,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797933452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:32,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:32,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:32,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891450935] [2021-05-21 20:51:32,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:32,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:32,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:32,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:32,917 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) [2021-05-21 20:51:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:33,001 INFO L93 Difference]: Finished difference Result 343 states and 948 transitions. [2021-05-21 20:51:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:33,001 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 [2021-05-21 20:51:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:33,001 INFO L225 Difference]: With dead ends: 343 [2021-05-21 20:51:33,001 INFO L226 Difference]: Without dead ends: 335 [2021-05-21 20:51:33,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-21 20:51:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 222. [2021-05-21 20:51:33,004 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) [2021-05-21 20:51:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 663 transitions. [2021-05-21 20:51:33,004 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 663 transitions. Word has length 19 [2021-05-21 20:51:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:33,004 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 663 transitions. [2021-05-21 20:51:33,004 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) [2021-05-21 20:51:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 663 transitions. [2021-05-21 20:51:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:33,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:33,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:33,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:33,205 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash 874518162, now seen corresponding path program 84 times [2021-05-21 20:51:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006397654] [2021-05-21 20:51:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:33,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006397654] [2021-05-21 20:51:33,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006397654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211517211] [2021-05-21 20:51:33,237 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 [2021-05-21 20:51:33,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:51:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:33,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:33,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211517211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:33,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:33,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:33,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638738084] [2021-05-21 20:51:33,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:33,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:33,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:33,329 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) [2021-05-21 20:51:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:33,418 INFO L93 Difference]: Finished difference Result 360 states and 1019 transitions. [2021-05-21 20:51:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:33,419 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 [2021-05-21 20:51:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:33,419 INFO L225 Difference]: With dead ends: 360 [2021-05-21 20:51:33,419 INFO L226 Difference]: Without dead ends: 360 [2021-05-21 20:51:33,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-21 20:51:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 213. [2021-05-21 20:51:33,421 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) [2021-05-21 20:51:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 633 transitions. [2021-05-21 20:51:33,422 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 633 transitions. Word has length 19 [2021-05-21 20:51:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:33,422 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 633 transitions. [2021-05-21 20:51:33,422 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) [2021-05-21 20:51:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 633 transitions. [2021-05-21 20:51:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:33,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:33,422 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:33,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-05-21 20:51:33,622 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash 793277490, now seen corresponding path program 85 times [2021-05-21 20:51:33,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:33,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690831216] [2021-05-21 20:51:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:33,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:33,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690831216] [2021-05-21 20:51:33,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690831216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:33,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732112256] [2021-05-21 20:51:33,652 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 [2021-05-21 20:51:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732112256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:33,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:33,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974399819] [2021-05-21 20:51:33,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:33,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:33,738 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) [2021-05-21 20:51:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:33,820 INFO L93 Difference]: Finished difference Result 315 states and 891 transitions. [2021-05-21 20:51:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:33,820 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 [2021-05-21 20:51:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:33,821 INFO L225 Difference]: With dead ends: 315 [2021-05-21 20:51:33,821 INFO L226 Difference]: Without dead ends: 306 [2021-05-21 20:51:33,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-21 20:51:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 213. [2021-05-21 20:51:33,823 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) [2021-05-21 20:51:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-05-21 20:51:33,823 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 19 [2021-05-21 20:51:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:33,823 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-05-21 20:51:33,823 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) [2021-05-21 20:51:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-05-21 20:51:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:33,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:33,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:34,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:34,024 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:34,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1182384003, now seen corresponding path program 85 times [2021-05-21 20:51:34,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:34,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483846786] [2021-05-21 20:51:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:34,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:34,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483846786] [2021-05-21 20:51:34,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483846786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:34,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393311229] [2021-05-21 20:51:34,057 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 [2021-05-21 20:51:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:34,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:34,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393311229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:34,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:34,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:51:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006252078] [2021-05-21 20:51:34,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:34,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:34,144 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) [2021-05-21 20:51:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:34,227 INFO L93 Difference]: Finished difference Result 302 states and 860 transitions. [2021-05-21 20:51:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:34,228 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 [2021-05-21 20:51:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:34,228 INFO L225 Difference]: With dead ends: 302 [2021-05-21 20:51:34,228 INFO L226 Difference]: Without dead ends: 302 [2021-05-21 20:51:34,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-21 20:51:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2021-05-21 20:51:34,230 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) [2021-05-21 20:51:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 617 transitions. [2021-05-21 20:51:34,231 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 617 transitions. Word has length 19 [2021-05-21 20:51:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:34,231 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 617 transitions. [2021-05-21 20:51:34,231 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) [2021-05-21 20:51:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 617 transitions. [2021-05-21 20:51:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:34,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:34,231 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:34,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-05-21 20:51:34,431 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1417121330, now seen corresponding path program 86 times [2021-05-21 20:51:34,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:34,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662436696] [2021-05-21 20:51:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:34,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:34,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662436696] [2021-05-21 20:51:34,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662436696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:34,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:34,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:34,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351307794] [2021-05-21 20:51:34,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:34,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:34,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:34,461 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) [2021-05-21 20:51:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:34,569 INFO L93 Difference]: Finished difference Result 353 states and 973 transitions. [2021-05-21 20:51:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:34,569 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 [2021-05-21 20:51:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:34,570 INFO L225 Difference]: With dead ends: 353 [2021-05-21 20:51:34,570 INFO L226 Difference]: Without dead ends: 347 [2021-05-21 20:51:34,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-21 20:51:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 219. [2021-05-21 20:51:34,572 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) [2021-05-21 20:51:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 642 transitions. [2021-05-21 20:51:34,572 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 642 transitions. Word has length 19 [2021-05-21 20:51:34,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:34,572 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 642 transitions. [2021-05-21 20:51:34,572 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) [2021-05-21 20:51:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 642 transitions. [2021-05-21 20:51:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:34,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:34,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:34,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752 [2021-05-21 20:51:34,573 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:34,573 INFO L82 PathProgramCache]: Analyzing trace with hash 315207178, now seen corresponding path program 87 times [2021-05-21 20:51:34,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:34,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68824820] [2021-05-21 20:51:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:34,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:34,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68824820] [2021-05-21 20:51:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68824820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:34,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:34,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259941807] [2021-05-21 20:51:34,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:34,605 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) [2021-05-21 20:51:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:34,705 INFO L93 Difference]: Finished difference Result 317 states and 890 transitions. [2021-05-21 20:51:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:34,706 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 [2021-05-21 20:51:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:34,706 INFO L225 Difference]: With dead ends: 317 [2021-05-21 20:51:34,706 INFO L226 Difference]: Without dead ends: 306 [2021-05-21 20:51:34,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-21 20:51:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 209. [2021-05-21 20:51:34,709 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) [2021-05-21 20:51:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 616 transitions. [2021-05-21 20:51:34,710 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 616 transitions. Word has length 19 [2021-05-21 20:51:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:34,710 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 616 transitions. [2021-05-21 20:51:34,710 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) [2021-05-21 20:51:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 616 transitions. [2021-05-21 20:51:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:34,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:34,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:34,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753 [2021-05-21 20:51:34,711 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:34,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2141133541, now seen corresponding path program 86 times [2021-05-21 20:51:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:34,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451525442] [2021-05-21 20:51:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:34,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:34,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451525442] [2021-05-21 20:51:34,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451525442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:34,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:34,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675587357] [2021-05-21 20:51:34,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:34,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:34,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:34,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:34,757 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) [2021-05-21 20:51:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:34,840 INFO L93 Difference]: Finished difference Result 353 states and 981 transitions. [2021-05-21 20:51:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:34,841 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 [2021-05-21 20:51:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:34,841 INFO L225 Difference]: With dead ends: 353 [2021-05-21 20:51:34,841 INFO L226 Difference]: Without dead ends: 347 [2021-05-21 20:51:34,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-21 20:51:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 221. [2021-05-21 20:51:34,843 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) [2021-05-21 20:51:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 653 transitions. [2021-05-21 20:51:34,844 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 653 transitions. Word has length 19 [2021-05-21 20:51:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:34,844 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 653 transitions. [2021-05-21 20:51:34,844 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) [2021-05-21 20:51:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 653 transitions. [2021-05-21 20:51:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:34,844 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:34,844 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:34,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754 [2021-05-21 20:51:34,845 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1883324063, now seen corresponding path program 87 times [2021-05-21 20:51:34,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:34,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575841386] [2021-05-21 20:51:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:34,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:34,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575841386] [2021-05-21 20:51:34,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575841386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:34,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:34,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:34,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216548831] [2021-05-21 20:51:34,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:34,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:34,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:34,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:34,877 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) [2021-05-21 20:51:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:34,959 INFO L93 Difference]: Finished difference Result 331 states and 944 transitions. [2021-05-21 20:51:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:34,959 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 [2021-05-21 20:51:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:34,960 INFO L225 Difference]: With dead ends: 331 [2021-05-21 20:51:34,960 INFO L226 Difference]: Without dead ends: 331 [2021-05-21 20:51:34,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-21 20:51:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 208. [2021-05-21 20:51:34,962 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) [2021-05-21 20:51:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-21 20:51:34,962 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-21 20:51:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:34,962 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-21 20:51:34,962 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) [2021-05-21 20:51:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-21 20:51:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:34,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:34,963 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:34,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755 [2021-05-21 20:51:34,963 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash -249991038, now seen corresponding path program 88 times [2021-05-21 20:51:34,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:34,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881642927] [2021-05-21 20:51:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:34,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:34,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881642927] [2021-05-21 20:51:34,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881642927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:34,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:34,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:34,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622268188] [2021-05-21 20:51:34,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:34,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:34,990 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) [2021-05-21 20:51:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:35,083 INFO L93 Difference]: Finished difference Result 292 states and 822 transitions. [2021-05-21 20:51:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:35,083 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 [2021-05-21 20:51:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:35,083 INFO L225 Difference]: With dead ends: 292 [2021-05-21 20:51:35,083 INFO L226 Difference]: Without dead ends: 280 [2021-05-21 20:51:35,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-21 20:51:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 210. [2021-05-21 20:51:35,089 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) [2021-05-21 20:51:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 616 transitions. [2021-05-21 20:51:35,090 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 616 transitions. Word has length 19 [2021-05-21 20:51:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:35,090 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 616 transitions. [2021-05-21 20:51:35,090 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) [2021-05-21 20:51:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 616 transitions. [2021-05-21 20:51:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:35,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:35,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:35,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable756 [2021-05-21 20:51:35,090 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 144187622, now seen corresponding path program 89 times [2021-05-21 20:51:35,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:35,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707190078] [2021-05-21 20:51:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:35,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:35,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707190078] [2021-05-21 20:51:35,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707190078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:35,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:35,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:35,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477217779] [2021-05-21 20:51:35,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:35,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:35,118 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) [2021-05-21 20:51:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:35,221 INFO L93 Difference]: Finished difference Result 280 states and 784 transitions. [2021-05-21 20:51:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:35,222 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 [2021-05-21 20:51:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:35,222 INFO L225 Difference]: With dead ends: 280 [2021-05-21 20:51:35,222 INFO L226 Difference]: Without dead ends: 274 [2021-05-21 20:51:35,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-21 20:51:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 220. [2021-05-21 20:51:35,224 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) [2021-05-21 20:51:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-05-21 20:51:35,225 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 19 [2021-05-21 20:51:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-05-21 20:51:35,225 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) [2021-05-21 20:51:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-05-21 20:51:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:35,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:35,225 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:35,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757 [2021-05-21 20:51:35,225 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash -957726530, now seen corresponding path program 90 times [2021-05-21 20:51:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:35,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049238359] [2021-05-21 20:51:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:35,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:35,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049238359] [2021-05-21 20:51:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049238359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:35,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47583630] [2021-05-21 20:51:35,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:35,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:35,252 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) [2021-05-21 20:51:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:35,339 INFO L93 Difference]: Finished difference Result 244 states and 701 transitions. [2021-05-21 20:51:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:35,340 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 [2021-05-21 20:51:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:35,340 INFO L225 Difference]: With dead ends: 244 [2021-05-21 20:51:35,340 INFO L226 Difference]: Without dead ends: 231 [2021-05-21 20:51:35,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-21 20:51:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2021-05-21 20:51:35,342 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) [2021-05-21 20:51:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 612 transitions. [2021-05-21 20:51:35,342 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 612 transitions. Word has length 19 [2021-05-21 20:51:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:35,342 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 612 transitions. [2021-05-21 20:51:35,342 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) [2021-05-21 20:51:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 612 transitions. [2021-05-21 20:51:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:35,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:35,343 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:35,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758 [2021-05-21 20:51:35,343 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash -427692237, now seen corresponding path program 88 times [2021-05-21 20:51:35,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:35,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243407182] [2021-05-21 20:51:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:35,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:35,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243407182] [2021-05-21 20:51:35,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243407182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:35,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:35,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:35,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867743618] [2021-05-21 20:51:35,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:35,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:35,369 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) [2021-05-21 20:51:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:35,433 INFO L93 Difference]: Finished difference Result 277 states and 780 transitions. [2021-05-21 20:51:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:35,433 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 [2021-05-21 20:51:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:35,433 INFO L225 Difference]: With dead ends: 277 [2021-05-21 20:51:35,433 INFO L226 Difference]: Without dead ends: 265 [2021-05-21 20:51:35,434 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 [2021-05-21 20:51:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-21 20:51:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 208. [2021-05-21 20:51:35,435 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) [2021-05-21 20:51:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 611 transitions. [2021-05-21 20:51:35,436 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 611 transitions. Word has length 19 [2021-05-21 20:51:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:35,436 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 611 transitions. [2021-05-21 20:51:35,436 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) [2021-05-21 20:51:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 611 transitions. [2021-05-21 20:51:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:35,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:35,436 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:35,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759 [2021-05-21 20:51:35,436 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:35,436 INFO L82 PathProgramCache]: Analyzing trace with hash 656044215, now seen corresponding path program 89 times [2021-05-21 20:51:35,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:35,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448763657] [2021-05-21 20:51:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:35,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:35,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448763657] [2021-05-21 20:51:35,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448763657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:35,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54596145] [2021-05-21 20:51:35,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:35,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:35,466 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) [2021-05-21 20:51:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:35,537 INFO L93 Difference]: Finished difference Result 281 states and 792 transitions. [2021-05-21 20:51:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:35,537 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 [2021-05-21 20:51:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:35,537 INFO L225 Difference]: With dead ends: 281 [2021-05-21 20:51:35,537 INFO L226 Difference]: Without dead ends: 275 [2021-05-21 20:51:35,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-05-21 20:51:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 214. [2021-05-21 20:51:35,540 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) [2021-05-21 20:51:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 625 transitions. [2021-05-21 20:51:35,541 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 625 transitions. Word has length 19 [2021-05-21 20:51:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:35,541 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 625 transitions. [2021-05-21 20:51:35,541 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) [2021-05-21 20:51:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 625 transitions. [2021-05-21 20:51:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:51:35,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:35,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:35,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760 [2021-05-21 20:51:35,541 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash 926553907, now seen corresponding path program 90 times [2021-05-21 20:51:35,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:35,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741081833] [2021-05-21 20:51:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:35,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741081833] [2021-05-21 20:51:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741081833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:35,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:35,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 20:51:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711174453] [2021-05-21 20:51:35,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:35,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:35,574 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) [2021-05-21 20:51:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:35,648 INFO L93 Difference]: Finished difference Result 246 states and 717 transitions. [2021-05-21 20:51:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:35,648 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 [2021-05-21 20:51:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:35,649 INFO L225 Difference]: With dead ends: 246 [2021-05-21 20:51:35,649 INFO L226 Difference]: Without dead ends: 246 [2021-05-21 20:51:35,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:51:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-21 20:51:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 189. [2021-05-21 20:51:35,651 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) [2021-05-21 20:51:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-05-21 20:51:35,651 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-05-21 20:51:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:35,651 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-05-21 20:51:35,651 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) [2021-05-21 20:51:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-05-21 20:51:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 20:51:35,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:35,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:35,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable761 [2021-05-21 20:51:35,652 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash 92049292, now seen corresponding path program 1 times [2021-05-21 20:51:35,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:35,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220105981] [2021-05-21 20:51:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:36,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:36,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220105981] [2021-05-21 20:51:36,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220105981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:36,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577542270] [2021-05-21 20:51:36,154 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 [2021-05-21 20:51:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:36,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:51:36,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:36,213 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 20:51:36,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-05-21 20:51:36,429 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 20:51:36,431 INFO L168 Benchmark]: Toolchain (without parser) took 134163.63 ms. Allocated memory was 350.2 MB in the beginning and 541.1 MB in the end (delta: 190.8 MB). Free memory was 329.6 MB in the beginning and 230.0 MB in the end (delta: 99.6 MB). Peak memory consumption was 294.7 MB. Max. memory is 16.0 GB. [2021-05-21 20:51:36,432 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 350.2 MB. Free memory was 331.0 MB in the beginning and 330.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:51:36,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.50 ms. Allocated memory is still 350.2 MB. Free memory was 329.6 MB in the beginning and 328.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:51:36,432 INFO L168 Benchmark]: Boogie Preprocessor took 15.81 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 327.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:51:36,432 INFO L168 Benchmark]: RCFGBuilder took 497.51 ms. Allocated memory is still 350.2 MB. Free memory was 326.9 MB in the beginning and 328.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. [2021-05-21 20:51:36,432 INFO L168 Benchmark]: TraceAbstraction took 133612.13 ms. Allocated memory was 350.2 MB in the beginning and 541.1 MB in the end (delta: 190.8 MB). Free memory was 327.6 MB in the beginning and 230.0 MB in the end (delta: 97.6 MB). Peak memory consumption was 290.6 MB. Max. memory is 16.0 GB. [2021-05-21 20:51:36,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 350.2 MB. Free memory was 331.0 MB in the beginning and 330.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.50 ms. Allocated memory is still 350.2 MB. Free memory was 329.6 MB in the beginning and 328.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.81 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 327.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 497.51 ms. Allocated memory is still 350.2 MB. Free memory was 326.9 MB in the beginning and 328.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 133612.13 ms. Allocated memory was 350.2 MB in the beginning and 541.1 MB in the end (delta: 190.8 MB). Free memory was 327.6 MB in the beginning and 230.0 MB in the end (delta: 97.6 MB). Peak memory consumption was 290.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...