/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-Separate.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 [2021-05-22 02:23:11,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:23:11,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:23:11,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:23:11,890 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-Separate.epf [2021-05-22 02:23:11,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:23:11,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:23:11,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:23:11,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:23:11,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:23:11,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:23:11,928 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:23:11,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:23:11,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:23:11,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:23:11,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:23:11,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:23:11,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:23:11,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:23:11,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:23:11,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:23:11,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:23:11,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:23:11,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:23:11,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:23:11,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:23:11,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:23:11,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:23:11,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:23:11,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:23:11,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:23:11,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:23:11,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:23:11,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:23:11,933 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:23:11,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:23:11,933 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:23:11,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:23:12,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:23:12,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:23:12,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:23:12,264 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:23:12,265 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:23:12,266 INFO L432 ainManager$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 [2021-05-22 02:23:12,266 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl' [2021-05-22 02:23:12,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:23:12,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:23:12,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:12,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:23:12,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:23:12,316 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 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,323 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 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:12,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:23:12,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:23:12,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:23:12,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/1) ... [2021-05-22 02:23:12,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:23:12,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:23:12,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:23:12,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:23:12,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (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 [2021-05-22 02:23:12,414 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:23:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:23:12,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:23:12,415 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:23:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:23:12,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:23:12,415 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:23:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:23:12,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:23:12,416 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:23:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:23:12,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:23:12,417 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:23:12,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:23:12,773 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-22 02:23:12,775 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:12 BoogieIcfgContainer [2021-05-22 02:23:12,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:23:12,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:23:12,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:23:12,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:23:12,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:12" (1/2) ... [2021-05-22 02:23:12,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fbb588 and model type word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:23:12, skipping insertion in model container [2021-05-22 02:23:12,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:12" (2/2) ... [2021-05-22 02:23:12,781 INFO L111 eAbstractionObserver]: Analyzing ICFG word-subst.wvr.bpl [2021-05-22 02:23:12,786 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:23:12,786 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:23:12,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:23:12,787 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:23:12,828 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:23:12,848 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:23:12,864 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:23:12,864 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:23:12,864 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:23:12,864 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:23:12,864 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:23:12,865 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:23:12,865 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:23:12,865 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:23:12,872 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-05-22 02:23:12,888 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) [2021-05-22 02:23:12,890 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) [2021-05-22 02:23:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:12,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:12,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:12,898 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:12,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:12,903 INFO L82 PathProgramCache]: Analyzing trace with hash -200100504, now seen corresponding path program 1 times [2021-05-22 02:23:12,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:12,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206613329] [2021-05-22 02:23:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:13,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:13,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206613329] [2021-05-22 02:23:13,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206613329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:13,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:13,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:13,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029876889] [2021-05-22 02:23:13,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:13,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:13,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:13,182 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) [2021-05-22 02:23:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:13,248 INFO L93 Difference]: Finished difference Result 171 states and 561 transitions. [2021-05-22 02:23:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:23:13,250 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 [2021-05-22 02:23:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:13,263 INFO L225 Difference]: With dead ends: 171 [2021-05-22 02:23:13,264 INFO L226 Difference]: Without dead ends: 108 [2021-05-22 02:23:13,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-22 02:23:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-22 02:23:13,319 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) [2021-05-22 02:23:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 353 transitions. [2021-05-22 02:23:13,324 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 353 transitions. Word has length 14 [2021-05-22 02:23:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:13,324 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 353 transitions. [2021-05-22 02:23:13,325 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) [2021-05-22 02:23:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 353 transitions. [2021-05-22 02:23:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:13,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:13,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:13,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:23:13,329 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1713787741, now seen corresponding path program 1 times [2021-05-22 02:23:13,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:13,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266334282] [2021-05-22 02:23:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:13,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:13,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266334282] [2021-05-22 02:23:13,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266334282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:13,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:13,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:13,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500529406] [2021-05-22 02:23:13,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:13,448 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) [2021-05-22 02:23:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:13,560 INFO L93 Difference]: Finished difference Result 172 states and 504 transitions. [2021-05-22 02:23:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:13,561 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 [2021-05-22 02:23:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:13,565 INFO L225 Difference]: With dead ends: 172 [2021-05-22 02:23:13,566 INFO L226 Difference]: Without dead ends: 153 [2021-05-22 02:23:13,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-22 02:23:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-05-22 02:23:13,586 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) [2021-05-22 02:23:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 390 transitions. [2021-05-22 02:23:13,587 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 390 transitions. Word has length 15 [2021-05-22 02:23:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:13,589 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 390 transitions. [2021-05-22 02:23:13,589 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) [2021-05-22 02:23:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 390 transitions. [2021-05-22 02:23:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:13,632 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:13,632 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:13,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:23:13,632 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1520780803, now seen corresponding path program 2 times [2021-05-22 02:23:13,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:13,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885636753] [2021-05-22 02:23:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:13,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:13,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885636753] [2021-05-22 02:23:13,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885636753] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:13,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:13,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:13,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074333090] [2021-05-22 02:23:13,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:13,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:13,704 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) [2021-05-22 02:23:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:13,776 INFO L93 Difference]: Finished difference Result 179 states and 520 transitions. [2021-05-22 02:23:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:13,776 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 [2021-05-22 02:23:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:13,777 INFO L225 Difference]: With dead ends: 179 [2021-05-22 02:23:13,778 INFO L226 Difference]: Without dead ends: 160 [2021-05-22 02:23:13,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-22 02:23:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-05-22 02:23:13,784 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) [2021-05-22 02:23:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 410 transitions. [2021-05-22 02:23:13,785 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 410 transitions. Word has length 15 [2021-05-22 02:23:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:13,785 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 410 transitions. [2021-05-22 02:23:13,785 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) [2021-05-22 02:23:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 410 transitions. [2021-05-22 02:23:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:13,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:13,786 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:13,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:23:13,786 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash 372369077, now seen corresponding path program 3 times [2021-05-22 02:23:13,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:13,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587019281] [2021-05-22 02:23:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:13,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:13,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587019281] [2021-05-22 02:23:13,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587019281] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:13,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:13,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:13,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657668575] [2021-05-22 02:23:13,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:13,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:13,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:13,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:13,862 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) [2021-05-22 02:23:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:13,943 INFO L93 Difference]: Finished difference Result 235 states and 657 transitions. [2021-05-22 02:23:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:13,944 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 [2021-05-22 02:23:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:13,945 INFO L225 Difference]: With dead ends: 235 [2021-05-22 02:23:13,946 INFO L226 Difference]: Without dead ends: 216 [2021-05-22 02:23:13,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-22 02:23:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 135. [2021-05-22 02:23:13,952 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) [2021-05-22 02:23:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 422 transitions. [2021-05-22 02:23:13,953 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 422 transitions. Word has length 15 [2021-05-22 02:23:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:13,953 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 422 transitions. [2021-05-22 02:23:13,953 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) [2021-05-22 02:23:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 422 transitions. [2021-05-22 02:23:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:13,954 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:13,954 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:13,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:23:13,954 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash 384286855, now seen corresponding path program 4 times [2021-05-22 02:23:13,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:13,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921346547] [2021-05-22 02:23:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921346547] [2021-05-22 02:23:14,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921346547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:14,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956972817] [2021-05-22 02:23:14,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:14,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:14,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,033 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) [2021-05-22 02:23:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,105 INFO L93 Difference]: Finished difference Result 194 states and 550 transitions. [2021-05-22 02:23:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:14,106 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 [2021-05-22 02:23:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,107 INFO L225 Difference]: With dead ends: 194 [2021-05-22 02:23:14,107 INFO L226 Difference]: Without dead ends: 171 [2021-05-22 02:23:14,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-22 02:23:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2021-05-22 02:23:14,112 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) [2021-05-22 02:23:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 420 transitions. [2021-05-22 02:23:14,113 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 420 transitions. Word has length 15 [2021-05-22 02:23:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,114 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 420 transitions. [2021-05-22 02:23:14,114 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) [2021-05-22 02:23:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 420 transitions. [2021-05-22 02:23:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:14,114 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,115 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:23:14,115 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1046340473, now seen corresponding path program 5 times [2021-05-22 02:23:14,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767994378] [2021-05-22 02:23:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767994378] [2021-05-22 02:23:14,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767994378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:14,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948755626] [2021-05-22 02:23:14,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:14,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:14,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,208 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) [2021-05-22 02:23:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,288 INFO L93 Difference]: Finished difference Result 228 states and 638 transitions. [2021-05-22 02:23:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:14,289 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 [2021-05-22 02:23:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,291 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:23:14,291 INFO L226 Difference]: Without dead ends: 209 [2021-05-22 02:23:14,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-22 02:23:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 137. [2021-05-22 02:23:14,298 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) [2021-05-22 02:23:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 427 transitions. [2021-05-22 02:23:14,299 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 427 transitions. Word has length 15 [2021-05-22 02:23:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,302 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 427 transitions. [2021-05-22 02:23:14,302 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) [2021-05-22 02:23:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 427 transitions. [2021-05-22 02:23:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:23:14,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:23:14,307 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash -964122021, now seen corresponding path program 6 times [2021-05-22 02:23:14,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236761300] [2021-05-22 02:23:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236761300] [2021-05-22 02:23:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236761300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:14,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555079505] [2021-05-22 02:23:14,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:14,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,427 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) [2021-05-22 02:23:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,498 INFO L93 Difference]: Finished difference Result 195 states and 552 transitions. [2021-05-22 02:23:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:14,499 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 [2021-05-22 02:23:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,500 INFO L225 Difference]: With dead ends: 195 [2021-05-22 02:23:14,500 INFO L226 Difference]: Without dead ends: 172 [2021-05-22 02:23:14,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-22 02:23:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-05-22 02:23:14,505 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) [2021-05-22 02:23:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 425 transitions. [2021-05-22 02:23:14,505 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 425 transitions. Word has length 15 [2021-05-22 02:23:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,506 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 425 transitions. [2021-05-22 02:23:14,506 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) [2021-05-22 02:23:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 425 transitions. [2021-05-22 02:23:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,507 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,507 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:23:14,507 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1568921575, now seen corresponding path program 1 times [2021-05-22 02:23:14,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828238872] [2021-05-22 02:23:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828238872] [2021-05-22 02:23:14,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828238872] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483488341] [2021-05-22 02:23:14,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,527 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) [2021-05-22 02:23:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,568 INFO L93 Difference]: Finished difference Result 203 states and 586 transitions. [2021-05-22 02:23:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:14,568 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 [2021-05-22 02:23:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,570 INFO L225 Difference]: With dead ends: 203 [2021-05-22 02:23:14,570 INFO L226 Difference]: Without dead ends: 203 [2021-05-22 02:23:14,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-22 02:23:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2021-05-22 02:23:14,574 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) [2021-05-22 02:23:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 421 transitions. [2021-05-22 02:23:14,575 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 421 transitions. Word has length 16 [2021-05-22 02:23:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,575 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 421 transitions. [2021-05-22 02:23:14,575 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) [2021-05-22 02:23:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 421 transitions. [2021-05-22 02:23:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:23:14,576 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1557107456, now seen corresponding path program 1 times [2021-05-22 02:23:14,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94357815] [2021-05-22 02:23:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94357815] [2021-05-22 02:23:14,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94357815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160720196] [2021-05-22 02:23:14,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,605 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) [2021-05-22 02:23:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,629 INFO L93 Difference]: Finished difference Result 194 states and 542 transitions. [2021-05-22 02:23:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:14,629 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 [2021-05-22 02:23:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,631 INFO L225 Difference]: With dead ends: 194 [2021-05-22 02:23:14,631 INFO L226 Difference]: Without dead ends: 171 [2021-05-22 02:23:14,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-22 02:23:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2021-05-22 02:23:14,635 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) [2021-05-22 02:23:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 408 transitions. [2021-05-22 02:23:14,635 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 408 transitions. Word has length 16 [2021-05-22 02:23:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,637 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 408 transitions. [2021-05-22 02:23:14,637 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) [2021-05-22 02:23:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 408 transitions. [2021-05-22 02:23:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,637 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,637 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:23:14,639 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1420564495, now seen corresponding path program 2 times [2021-05-22 02:23:14,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951771787] [2021-05-22 02:23:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951771787] [2021-05-22 02:23:14,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951771787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568218700] [2021-05-22 02:23:14,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,672 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) [2021-05-22 02:23:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,700 INFO L93 Difference]: Finished difference Result 205 states and 567 transitions. [2021-05-22 02:23:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:14,700 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 [2021-05-22 02:23:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,703 INFO L225 Difference]: With dead ends: 205 [2021-05-22 02:23:14,703 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:23:14,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:23:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 114. [2021-05-22 02:23:14,707 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) [2021-05-22 02:23:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 330 transitions. [2021-05-22 02:23:14,707 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 330 transitions. Word has length 16 [2021-05-22 02:23:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,707 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 330 transitions. [2021-05-22 02:23:14,708 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) [2021-05-22 02:23:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 330 transitions. [2021-05-22 02:23:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:23:14,708 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1521275701, now seen corresponding path program 3 times [2021-05-22 02:23:14,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644556160] [2021-05-22 02:23:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644556160] [2021-05-22 02:23:14,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644556160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834476919] [2021-05-22 02:23:14,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,730 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) [2021-05-22 02:23:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,744 INFO L93 Difference]: Finished difference Result 171 states and 460 transitions. [2021-05-22 02:23:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:14,744 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 [2021-05-22 02:23:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,745 INFO L225 Difference]: With dead ends: 171 [2021-05-22 02:23:14,745 INFO L226 Difference]: Without dead ends: 165 [2021-05-22 02:23:14,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-22 02:23:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2021-05-22 02:23:14,749 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) [2021-05-22 02:23:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 317 transitions. [2021-05-22 02:23:14,749 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 317 transitions. Word has length 16 [2021-05-22 02:23:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,749 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 317 transitions. [2021-05-22 02:23:14,749 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) [2021-05-22 02:23:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 317 transitions. [2021-05-22 02:23:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:23:14,750 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1372165464, now seen corresponding path program 2 times [2021-05-22 02:23:14,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283897309] [2021-05-22 02:23:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283897309] [2021-05-22 02:23:14,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283897309] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371547133] [2021-05-22 02:23:14,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,778 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) [2021-05-22 02:23:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,793 INFO L93 Difference]: Finished difference Result 179 states and 482 transitions. [2021-05-22 02:23:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:14,794 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 [2021-05-22 02:23:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,795 INFO L225 Difference]: With dead ends: 179 [2021-05-22 02:23:14,795 INFO L226 Difference]: Without dead ends: 164 [2021-05-22 02:23:14,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-22 02:23:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 114. [2021-05-22 02:23:14,799 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) [2021-05-22 02:23:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-05-22 02:23:14,800 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 16 [2021-05-22 02:23:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,800 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-05-22 02:23:14,800 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) [2021-05-22 02:23:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-05-22 02:23:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:23:14,801 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -507426732, now seen corresponding path program 3 times [2021-05-22 02:23:14,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100040336] [2021-05-22 02:23:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100040336] [2021-05-22 02:23:14,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100040336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248129406] [2021-05-22 02:23:14,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,822 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) [2021-05-22 02:23:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,834 INFO L93 Difference]: Finished difference Result 156 states and 416 transitions. [2021-05-22 02:23:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:14,835 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 [2021-05-22 02:23:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,836 INFO L225 Difference]: With dead ends: 156 [2021-05-22 02:23:14,836 INFO L226 Difference]: Without dead ends: 146 [2021-05-22 02:23:14,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-22 02:23:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-05-22 02:23:14,839 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) [2021-05-22 02:23:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 315 transitions. [2021-05-22 02:23:14,840 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 315 transitions. Word has length 16 [2021-05-22 02:23:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,840 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 315 transitions. [2021-05-22 02:23:14,840 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) [2021-05-22 02:23:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 315 transitions. [2021-05-22 02:23:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:23:14,841 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1294148210, now seen corresponding path program 4 times [2021-05-22 02:23:14,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008473027] [2021-05-22 02:23:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008473027] [2021-05-22 02:23:14,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008473027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445304776] [2021-05-22 02:23:14,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,858 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) [2021-05-22 02:23:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,870 INFO L93 Difference]: Finished difference Result 151 states and 405 transitions. [2021-05-22 02:23:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:14,870 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 [2021-05-22 02:23:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,872 INFO L225 Difference]: With dead ends: 151 [2021-05-22 02:23:14,872 INFO L226 Difference]: Without dead ends: 145 [2021-05-22 02:23:14,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-22 02:23:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2021-05-22 02:23:14,876 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) [2021-05-22 02:23:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 312 transitions. [2021-05-22 02:23:14,877 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 312 transitions. Word has length 16 [2021-05-22 02:23:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,877 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 312 transitions. [2021-05-22 02:23:14,877 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) [2021-05-22 02:23:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 312 transitions. [2021-05-22 02:23:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:23:14,878 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,878 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:23:14,878 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1904685263, now seen corresponding path program 4 times [2021-05-22 02:23:14,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693615820] [2021-05-22 02:23:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693615820] [2021-05-22 02:23:14,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693615820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421188617] [2021-05-22 02:23:14,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,898 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) [2021-05-22 02:23:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,908 INFO L93 Difference]: Finished difference Result 116 states and 321 transitions. [2021-05-22 02:23:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:14,909 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 [2021-05-22 02:23:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,909 INFO L225 Difference]: With dead ends: 116 [2021-05-22 02:23:14,909 INFO L226 Difference]: Without dead ends: 108 [2021-05-22 02:23:14,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-22 02:23:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-22 02:23:14,915 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) [2021-05-22 02:23:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-05-22 02:23:14,916 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-05-22 02:23:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,916 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-05-22 02:23:14,916 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) [2021-05-22 02:23:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-05-22 02:23:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:14,917 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,917 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:23:14,918 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1361223606, now seen corresponding path program 1 times [2021-05-22 02:23:14,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372092633] [2021-05-22 02:23:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372092633] [2021-05-22 02:23:14,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372092633] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:14,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355898991] [2021-05-22 02:23:14,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:14,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:14,998 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) [2021-05-22 02:23:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,155 INFO L93 Difference]: Finished difference Result 265 states and 721 transitions. [2021-05-22 02:23:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,157 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:23:15,157 INFO L226 Difference]: Without dead ends: 250 [2021-05-22 02:23:15,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-22 02:23:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-05-22 02:23:15,164 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) [2021-05-22 02:23:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-05-22 02:23:15,165 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-05-22 02:23:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,165 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-05-22 02:23:15,165 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) [2021-05-22 02:23:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-05-22 02:23:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:15,168 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,168 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:23:15,168 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1726190618, now seen corresponding path program 2 times [2021-05-22 02:23:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557168712] [2021-05-22 02:23:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557168712] [2021-05-22 02:23:15,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557168712] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:15,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:15,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:15,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442049108] [2021-05-22 02:23:15,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:15,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:15,266 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) [2021-05-22 02:23:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,482 INFO L93 Difference]: Finished difference Result 298 states and 795 transitions. [2021-05-22 02:23:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:15,483 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 [2021-05-22 02:23:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,488 INFO L225 Difference]: With dead ends: 298 [2021-05-22 02:23:15,488 INFO L226 Difference]: Without dead ends: 283 [2021-05-22 02:23:15,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-22 02:23:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-05-22 02:23:15,499 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) [2021-05-22 02:23:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-22 02:23:15,500 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-22 02:23:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,500 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-22 02:23:15,500 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) [2021-05-22 02:23:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-22 02:23:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:15,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:23:15,501 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,502 INFO L82 PathProgramCache]: Analyzing trace with hash 870056290, now seen corresponding path program 3 times [2021-05-22 02:23:15,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272794561] [2021-05-22 02:23:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272794561] [2021-05-22 02:23:15,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272794561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:15,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:15,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:15,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284953848] [2021-05-22 02:23:15,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:15,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:15,584 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) [2021-05-22 02:23:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,829 INFO L93 Difference]: Finished difference Result 281 states and 763 transitions. [2021-05-22 02:23:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:15,830 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 [2021-05-22 02:23:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,832 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:23:15,832 INFO L226 Difference]: Without dead ends: 266 [2021-05-22 02:23:15,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-22 02:23:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-05-22 02:23:15,837 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) [2021-05-22 02:23:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-22 02:23:15,838 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-22 02:23:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,838 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-22 02:23:15,839 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) [2021-05-22 02:23:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-22 02:23:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:15,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,839 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:23:15,840 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2059322360, now seen corresponding path program 4 times [2021-05-22 02:23:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172744805] [2021-05-22 02:23:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172744805] [2021-05-22 02:23:15,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172744805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:15,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:15,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051901541] [2021-05-22 02:23:15,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:15,933 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) [2021-05-22 02:23:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,083 INFO L93 Difference]: Finished difference Result 289 states and 784 transitions. [2021-05-22 02:23:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:16,083 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 [2021-05-22 02:23:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,085 INFO L225 Difference]: With dead ends: 289 [2021-05-22 02:23:16,085 INFO L226 Difference]: Without dead ends: 274 [2021-05-22 02:23:16,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-22 02:23:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-05-22 02:23:16,090 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) [2021-05-22 02:23:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-22 02:23:16,091 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-22 02:23:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,091 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-22 02:23:16,091 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) [2021-05-22 02:23:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-22 02:23:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:16,092 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,092 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:23:16,092 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2033546876, now seen corresponding path program 5 times [2021-05-22 02:23:16,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874052842] [2021-05-22 02:23:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874052842] [2021-05-22 02:23:16,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874052842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:16,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83258750] [2021-05-22 02:23:16,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:16,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:16,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:16,164 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) [2021-05-22 02:23:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,356 INFO L93 Difference]: Finished difference Result 322 states and 859 transitions. [2021-05-22 02:23:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:16,356 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 [2021-05-22 02:23:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,358 INFO L225 Difference]: With dead ends: 322 [2021-05-22 02:23:16,358 INFO L226 Difference]: Without dead ends: 307 [2021-05-22 02:23:16,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-22 02:23:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-05-22 02:23:16,364 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) [2021-05-22 02:23:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-05-22 02:23:16,365 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-05-22 02:23:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,365 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-05-22 02:23:16,365 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) [2021-05-22 02:23:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-05-22 02:23:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:16,366 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:23:16,366 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash 334826488, now seen corresponding path program 6 times [2021-05-22 02:23:16,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022480762] [2021-05-22 02:23:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022480762] [2021-05-22 02:23:16,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022480762] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:16,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565899016] [2021-05-22 02:23:16,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:16,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:16,433 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) [2021-05-22 02:23:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,629 INFO L93 Difference]: Finished difference Result 299 states and 814 transitions. [2021-05-22 02:23:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:16,630 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 [2021-05-22 02:23:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,631 INFO L225 Difference]: With dead ends: 299 [2021-05-22 02:23:16,631 INFO L226 Difference]: Without dead ends: 284 [2021-05-22 02:23:16,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-22 02:23:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-05-22 02:23:16,636 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) [2021-05-22 02:23:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-22 02:23:16,637 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-22 02:23:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,637 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-22 02:23:16,637 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) [2021-05-22 02:23:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-22 02:23:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:16,638 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,638 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:23:16,638 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2035892590, now seen corresponding path program 7 times [2021-05-22 02:23:16,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969117611] [2021-05-22 02:23:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969117611] [2021-05-22 02:23:16,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969117611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:16,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407354252] [2021-05-22 02:23:16,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:16,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:16,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:16,698 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) [2021-05-22 02:23:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,902 INFO L93 Difference]: Finished difference Result 389 states and 1040 transitions. [2021-05-22 02:23:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:16,902 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 [2021-05-22 02:23:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,904 INFO L225 Difference]: With dead ends: 389 [2021-05-22 02:23:16,904 INFO L226 Difference]: Without dead ends: 374 [2021-05-22 02:23:16,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-22 02:23:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-05-22 02:23:16,910 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) [2021-05-22 02:23:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-05-22 02:23:16,910 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-05-22 02:23:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,911 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-05-22 02:23:16,911 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) [2021-05-22 02:23:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-05-22 02:23:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:16,911 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,911 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 02:23:16,912 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash -828339518, now seen corresponding path program 8 times [2021-05-22 02:23:16,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763233731] [2021-05-22 02:23:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763233731] [2021-05-22 02:23:16,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763233731] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:16,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964881739] [2021-05-22 02:23:16,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:16,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:16,977 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) [2021-05-22 02:23:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:17,205 INFO L93 Difference]: Finished difference Result 398 states and 1066 transitions. [2021-05-22 02:23:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:17,205 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 [2021-05-22 02:23:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:17,207 INFO L225 Difference]: With dead ends: 398 [2021-05-22 02:23:17,207 INFO L226 Difference]: Without dead ends: 383 [2021-05-22 02:23:17,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-22 02:23:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-05-22 02:23:17,214 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) [2021-05-22 02:23:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-05-22 02:23:17,214 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-05-22 02:23:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:17,215 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-05-22 02:23:17,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-05-22 02:23:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:17,215 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:17,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:17,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 02:23:17,216 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:17,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1767907390, now seen corresponding path program 9 times [2021-05-22 02:23:17,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:17,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802006259] [2021-05-22 02:23:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:17,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:17,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802006259] [2021-05-22 02:23:17,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802006259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:17,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:17,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:17,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006157714] [2021-05-22 02:23:17,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:17,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:17,284 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) [2021-05-22 02:23:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:17,503 INFO L93 Difference]: Finished difference Result 405 states and 1082 transitions. [2021-05-22 02:23:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:17,503 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 [2021-05-22 02:23:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:17,505 INFO L225 Difference]: With dead ends: 405 [2021-05-22 02:23:17,505 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:23:17,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:23:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-05-22 02:23:17,511 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) [2021-05-22 02:23:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-05-22 02:23:17,512 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-05-22 02:23:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:17,512 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-05-22 02:23:17,512 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) [2021-05-22 02:23:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-05-22 02:23:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:17,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:17,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:17,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 02:23:17,513 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1043349262, now seen corresponding path program 10 times [2021-05-22 02:23:17,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:17,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780726104] [2021-05-22 02:23:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:17,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:17,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780726104] [2021-05-22 02:23:17,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780726104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:17,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:17,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:17,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194235665] [2021-05-22 02:23:17,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:17,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:17,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:17,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:17,563 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) [2021-05-22 02:23:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:17,676 INFO L93 Difference]: Finished difference Result 340 states and 918 transitions. [2021-05-22 02:23:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:17,678 INFO L225 Difference]: With dead ends: 340 [2021-05-22 02:23:17,678 INFO L226 Difference]: Without dead ends: 325 [2021-05-22 02:23:17,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-22 02:23:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-05-22 02:23:17,685 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) [2021-05-22 02:23:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-05-22 02:23:17,685 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-05-22 02:23:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:17,686 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-05-22 02:23:17,686 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) [2021-05-22 02:23:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-05-22 02:23:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:17,686 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:17,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:17,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:23:17,687 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:17,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1480345592, now seen corresponding path program 11 times [2021-05-22 02:23:17,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:17,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459719720] [2021-05-22 02:23:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:17,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:17,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459719720] [2021-05-22 02:23:17,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459719720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:17,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:17,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:17,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254941059] [2021-05-22 02:23:17,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:17,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:17,742 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) [2021-05-22 02:23:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:17,889 INFO L93 Difference]: Finished difference Result 335 states and 909 transitions. [2021-05-22 02:23:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:17,891 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 [2021-05-22 02:23:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:17,893 INFO L225 Difference]: With dead ends: 335 [2021-05-22 02:23:17,893 INFO L226 Difference]: Without dead ends: 320 [2021-05-22 02:23:17,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-22 02:23:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-05-22 02:23:17,898 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) [2021-05-22 02:23:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-22 02:23:17,899 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-22 02:23:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:17,899 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-22 02:23:17,899 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) [2021-05-22 02:23:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-22 02:23:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:17,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:17,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:17,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 02:23:17,900 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash -145439044, now seen corresponding path program 12 times [2021-05-22 02:23:17,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:17,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634690413] [2021-05-22 02:23:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:17,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:17,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634690413] [2021-05-22 02:23:17,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634690413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:17,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:17,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:17,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997589558] [2021-05-22 02:23:17,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:17,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:17,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:17,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:17,953 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) [2021-05-22 02:23:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:18,105 INFO L93 Difference]: Finished difference Result 318 states and 879 transitions. [2021-05-22 02:23:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:18,106 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 [2021-05-22 02:23:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:18,107 INFO L225 Difference]: With dead ends: 318 [2021-05-22 02:23:18,107 INFO L226 Difference]: Without dead ends: 303 [2021-05-22 02:23:18,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-22 02:23:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-05-22 02:23:18,128 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) [2021-05-22 02:23:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-22 02:23:18,129 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-22 02:23:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:18,129 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-22 02:23:18,129 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) [2021-05-22 02:23:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-22 02:23:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:18,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:18,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:18,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 02:23:18,130 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash 161256120, now seen corresponding path program 13 times [2021-05-22 02:23:18,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:18,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499483776] [2021-05-22 02:23:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:18,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:18,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499483776] [2021-05-22 02:23:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499483776] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:18,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:18,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:18,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985149650] [2021-05-22 02:23:18,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:18,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:18,183 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) [2021-05-22 02:23:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:18,304 INFO L93 Difference]: Finished difference Result 385 states and 1046 transitions. [2021-05-22 02:23:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:18,304 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 [2021-05-22 02:23:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:18,306 INFO L225 Difference]: With dead ends: 385 [2021-05-22 02:23:18,306 INFO L226 Difference]: Without dead ends: 370 [2021-05-22 02:23:18,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-22 02:23:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-05-22 02:23:18,312 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) [2021-05-22 02:23:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:18,313 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:18,313 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:18,313 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) [2021-05-22 02:23:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:18,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:18,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:18,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 02:23:18,314 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1057379240, now seen corresponding path program 14 times [2021-05-22 02:23:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:18,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687129540] [2021-05-22 02:23:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:18,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:18,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687129540] [2021-05-22 02:23:18,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687129540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:18,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:18,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:18,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721485326] [2021-05-22 02:23:18,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:18,368 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) [2021-05-22 02:23:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:18,504 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-05-22 02:23:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:18,506 INFO L225 Difference]: With dead ends: 383 [2021-05-22 02:23:18,506 INFO L226 Difference]: Without dead ends: 368 [2021-05-22 02:23:18,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-22 02:23:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-05-22 02:23:18,512 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) [2021-05-22 02:23:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:18,512 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:18,512 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:18,512 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) [2021-05-22 02:23:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:18,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:18,513 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:18,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 02:23:18,513 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:18,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1150316668, now seen corresponding path program 15 times [2021-05-22 02:23:18,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:18,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161976359] [2021-05-22 02:23:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:18,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:18,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161976359] [2021-05-22 02:23:18,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161976359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:18,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:18,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403332873] [2021-05-22 02:23:18,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:18,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:18,568 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) [2021-05-22 02:23:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:18,743 INFO L93 Difference]: Finished difference Result 392 states and 1055 transitions. [2021-05-22 02:23:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:18,743 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 [2021-05-22 02:23:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:18,745 INFO L225 Difference]: With dead ends: 392 [2021-05-22 02:23:18,745 INFO L226 Difference]: Without dead ends: 377 [2021-05-22 02:23:18,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-22 02:23:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-05-22 02:23:18,751 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) [2021-05-22 02:23:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-05-22 02:23:18,751 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-05-22 02:23:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:18,752 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-05-22 02:23:18,752 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) [2021-05-22 02:23:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-05-22 02:23:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:18,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:18,752 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:18,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 02:23:18,753 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -19872328, now seen corresponding path program 16 times [2021-05-22 02:23:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452961680] [2021-05-22 02:23:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:18,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:18,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452961680] [2021-05-22 02:23:18,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452961680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:18,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:18,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:18,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344829992] [2021-05-22 02:23:18,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:18,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:18,813 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) [2021-05-22 02:23:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:18,995 INFO L93 Difference]: Finished difference Result 376 states and 1032 transitions. [2021-05-22 02:23:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:18,996 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 [2021-05-22 02:23:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:18,998 INFO L225 Difference]: With dead ends: 376 [2021-05-22 02:23:18,998 INFO L226 Difference]: Without dead ends: 361 [2021-05-22 02:23:18,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-22 02:23:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-05-22 02:23:19,003 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) [2021-05-22 02:23:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:19,003 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:19,003 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:19,003 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) [2021-05-22 02:23:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:19,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:19,004 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:19,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 02:23:19,004 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:19,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:19,005 INFO L82 PathProgramCache]: Analyzing trace with hash -36809380, now seen corresponding path program 17 times [2021-05-22 02:23:19,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:19,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597238703] [2021-05-22 02:23:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:19,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:19,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597238703] [2021-05-22 02:23:19,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597238703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:19,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:19,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:19,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366294450] [2021-05-22 02:23:19,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:19,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:19,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:19,065 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) [2021-05-22 02:23:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:19,205 INFO L93 Difference]: Finished difference Result 364 states and 991 transitions. [2021-05-22 02:23:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:19,205 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 [2021-05-22 02:23:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:19,207 INFO L225 Difference]: With dead ends: 364 [2021-05-22 02:23:19,207 INFO L226 Difference]: Without dead ends: 349 [2021-05-22 02:23:19,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-22 02:23:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-05-22 02:23:19,212 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) [2021-05-22 02:23:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-05-22 02:23:19,213 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-05-22 02:23:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:19,213 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-05-22 02:23:19,213 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) [2021-05-22 02:23:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-05-22 02:23:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:19,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:19,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:19,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 02:23:19,214 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1103474456, now seen corresponding path program 18 times [2021-05-22 02:23:19,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:19,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556042267] [2021-05-22 02:23:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:19,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:19,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556042267] [2021-05-22 02:23:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556042267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:19,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:19,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340302916] [2021-05-22 02:23:19,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:19,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:19,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:19,265 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) [2021-05-22 02:23:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:19,425 INFO L93 Difference]: Finished difference Result 343 states and 953 transitions. [2021-05-22 02:23:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:19,425 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 [2021-05-22 02:23:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:19,426 INFO L225 Difference]: With dead ends: 343 [2021-05-22 02:23:19,427 INFO L226 Difference]: Without dead ends: 328 [2021-05-22 02:23:19,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-22 02:23:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-05-22 02:23:19,431 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) [2021-05-22 02:23:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-22 02:23:19,432 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-22 02:23:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:19,432 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-22 02:23:19,432 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) [2021-05-22 02:23:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-22 02:23:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:19,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:19,433 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:19,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 02:23:19,433 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1622951230, now seen corresponding path program 19 times [2021-05-22 02:23:19,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:19,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752786042] [2021-05-22 02:23:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:19,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:19,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752786042] [2021-05-22 02:23:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752786042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:19,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:19,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672580725] [2021-05-22 02:23:19,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:19,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:19,480 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) [2021-05-22 02:23:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:19,584 INFO L93 Difference]: Finished difference Result 360 states and 983 transitions. [2021-05-22 02:23:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:19,584 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 [2021-05-22 02:23:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:19,586 INFO L225 Difference]: With dead ends: 360 [2021-05-22 02:23:19,586 INFO L226 Difference]: Without dead ends: 345 [2021-05-22 02:23:19,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-22 02:23:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-05-22 02:23:19,591 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) [2021-05-22 02:23:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:19,591 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:19,592 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:19,592 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) [2021-05-22 02:23:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:19,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:19,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:19,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 02:23:19,593 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1422092646, now seen corresponding path program 20 times [2021-05-22 02:23:19,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:19,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791949261] [2021-05-22 02:23:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:19,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:19,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791949261] [2021-05-22 02:23:19,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791949261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:19,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:19,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:19,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209205031] [2021-05-22 02:23:19,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:19,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:19,638 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) [2021-05-22 02:23:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:19,787 INFO L93 Difference]: Finished difference Result 377 states and 1017 transitions. [2021-05-22 02:23:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:19,788 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 [2021-05-22 02:23:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:19,789 INFO L225 Difference]: With dead ends: 377 [2021-05-22 02:23:19,789 INFO L226 Difference]: Without dead ends: 362 [2021-05-22 02:23:19,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-22 02:23:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-05-22 02:23:19,795 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) [2021-05-22 02:23:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-05-22 02:23:19,796 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-05-22 02:23:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:19,796 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-05-22 02:23:19,796 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) [2021-05-22 02:23:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-05-22 02:23:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:19,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:19,797 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:19,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 02:23:19,797 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash 203457286, now seen corresponding path program 21 times [2021-05-22 02:23:19,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:19,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455975357] [2021-05-22 02:23:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:19,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455975357] [2021-05-22 02:23:19,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455975357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:19,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:19,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:19,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773062511] [2021-05-22 02:23:19,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:19,859 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) [2021-05-22 02:23:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,005 INFO L93 Difference]: Finished difference Result 354 states and 972 transitions. [2021-05-22 02:23:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,007 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:23:20,007 INFO L226 Difference]: Without dead ends: 339 [2021-05-22 02:23:20,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-22 02:23:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-05-22 02:23:20,012 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) [2021-05-22 02:23:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:20,013 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,013 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:20,013 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) [2021-05-22 02:23:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:20,013 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,013 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 02:23:20,014 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1026845314, now seen corresponding path program 22 times [2021-05-22 02:23:20,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896295073] [2021-05-22 02:23:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896295073] [2021-05-22 02:23:20,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896295073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:20,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:20,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:20,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609619513] [2021-05-22 02:23:20,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:20,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:20,081 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) [2021-05-22 02:23:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,237 INFO L93 Difference]: Finished difference Result 409 states and 1106 transitions. [2021-05-22 02:23:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:20,237 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 [2021-05-22 02:23:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,239 INFO L225 Difference]: With dead ends: 409 [2021-05-22 02:23:20,239 INFO L226 Difference]: Without dead ends: 394 [2021-05-22 02:23:20,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-22 02:23:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-05-22 02:23:20,245 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) [2021-05-22 02:23:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-05-22 02:23:20,245 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-05-22 02:23:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,246 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-05-22 02:23:20,246 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) [2021-05-22 02:23:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-05-22 02:23:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:20,246 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,246 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 02:23:20,247 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1848016830, now seen corresponding path program 23 times [2021-05-22 02:23:20,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584813032] [2021-05-22 02:23:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584813032] [2021-05-22 02:23:20,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584813032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:20,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:20,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:20,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784023584] [2021-05-22 02:23:20,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:20,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:20,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:20,309 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) [2021-05-22 02:23:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,523 INFO L93 Difference]: Finished difference Result 407 states and 1110 transitions. [2021-05-22 02:23:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:20,524 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 [2021-05-22 02:23:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,525 INFO L225 Difference]: With dead ends: 407 [2021-05-22 02:23:20,525 INFO L226 Difference]: Without dead ends: 392 [2021-05-22 02:23:20,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-22 02:23:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-05-22 02:23:20,531 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) [2021-05-22 02:23:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-05-22 02:23:20,531 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-05-22 02:23:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,532 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-05-22 02:23:20,532 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) [2021-05-22 02:23:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-05-22 02:23:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:20,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 02:23:20,532 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 748230078, now seen corresponding path program 24 times [2021-05-22 02:23:20,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144072272] [2021-05-22 02:23:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144072272] [2021-05-22 02:23:20,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144072272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:20,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:20,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:20,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949473069] [2021-05-22 02:23:20,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:20,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:20,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:20,598 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) [2021-05-22 02:23:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,786 INFO L93 Difference]: Finished difference Result 384 states and 1065 transitions. [2021-05-22 02:23:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:20,787 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 [2021-05-22 02:23:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,788 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:23:20,788 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:23:20,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:23:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-05-22 02:23:20,793 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) [2021-05-22 02:23:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:20,794 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,794 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:20,794 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) [2021-05-22 02:23:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:20,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 02:23:20,795 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1951172510, now seen corresponding path program 25 times [2021-05-22 02:23:20,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715484634] [2021-05-22 02:23:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715484634] [2021-05-22 02:23:20,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715484634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:20,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:20,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:20,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892267943] [2021-05-22 02:23:20,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:20,844 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) [2021-05-22 02:23:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,972 INFO L93 Difference]: Finished difference Result 403 states and 1103 transitions. [2021-05-22 02:23:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:20,972 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 [2021-05-22 02:23:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,974 INFO L225 Difference]: With dead ends: 403 [2021-05-22 02:23:20,974 INFO L226 Difference]: Without dead ends: 388 [2021-05-22 02:23:20,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-22 02:23:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-05-22 02:23:20,978 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) [2021-05-22 02:23:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-22 02:23:20,979 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-22 02:23:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,979 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-22 02:23:20,979 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) [2021-05-22 02:23:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-22 02:23:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:20,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,979 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 02:23:20,980 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159426, now seen corresponding path program 26 times [2021-05-22 02:23:20,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385854129] [2021-05-22 02:23:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385854129] [2021-05-22 02:23:21,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385854129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:21,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770632976] [2021-05-22 02:23:21,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:21,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:21,043 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) [2021-05-22 02:23:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,167 INFO L93 Difference]: Finished difference Result 401 states and 1096 transitions. [2021-05-22 02:23:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:21,167 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 [2021-05-22 02:23:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,169 INFO L225 Difference]: With dead ends: 401 [2021-05-22 02:23:21,169 INFO L226 Difference]: Without dead ends: 386 [2021-05-22 02:23:21,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-22 02:23:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-05-22 02:23:21,173 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) [2021-05-22 02:23:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-22 02:23:21,174 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-22 02:23:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,174 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-22 02:23:21,174 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) [2021-05-22 02:23:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-22 02:23:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:21,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,175 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 02:23:21,175 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -962111962, now seen corresponding path program 27 times [2021-05-22 02:23:21,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561291675] [2021-05-22 02:23:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561291675] [2021-05-22 02:23:21,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561291675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007374624] [2021-05-22 02:23:21,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:21,232 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) [2021-05-22 02:23:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,404 INFO L93 Difference]: Finished difference Result 395 states and 1075 transitions. [2021-05-22 02:23:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:21,404 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 [2021-05-22 02:23:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,406 INFO L225 Difference]: With dead ends: 395 [2021-05-22 02:23:21,406 INFO L226 Difference]: Without dead ends: 380 [2021-05-22 02:23:21,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-22 02:23:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-05-22 02:23:21,412 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) [2021-05-22 02:23:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-05-22 02:23:21,413 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-05-22 02:23:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,413 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-05-22 02:23:21,413 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) [2021-05-22 02:23:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-05-22 02:23:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:21,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,414 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 02:23:21,414 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2132300958, now seen corresponding path program 28 times [2021-05-22 02:23:21,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976771772] [2021-05-22 02:23:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976771772] [2021-05-22 02:23:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976771772] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:21,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15987371] [2021-05-22 02:23:21,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:21,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:21,476 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) [2021-05-22 02:23:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,670 INFO L93 Difference]: Finished difference Result 379 states and 1052 transitions. [2021-05-22 02:23:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:21,671 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 [2021-05-22 02:23:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,672 INFO L225 Difference]: With dead ends: 379 [2021-05-22 02:23:21,672 INFO L226 Difference]: Without dead ends: 364 [2021-05-22 02:23:21,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-22 02:23:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-05-22 02:23:21,678 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) [2021-05-22 02:23:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-22 02:23:21,679 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-22 02:23:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,681 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-22 02:23:21,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-22 02:23:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:21,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,682 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 02:23:21,682 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2145729286, now seen corresponding path program 29 times [2021-05-22 02:23:21,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419231135] [2021-05-22 02:23:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419231135] [2021-05-22 02:23:21,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419231135] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:21,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379088553] [2021-05-22 02:23:21,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:21,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:21,743 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) [2021-05-22 02:23:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,898 INFO L93 Difference]: Finished difference Result 363 states and 1003 transitions. [2021-05-22 02:23:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:21,899 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 [2021-05-22 02:23:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,900 INFO L225 Difference]: With dead ends: 363 [2021-05-22 02:23:21,900 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:23:21,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:23:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-05-22 02:23:21,904 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) [2021-05-22 02:23:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-22 02:23:21,904 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-22 02:23:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,905 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-22 02:23:21,905 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) [2021-05-22 02:23:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-22 02:23:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:21,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 02:23:21,906 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1008954174, now seen corresponding path program 30 times [2021-05-22 02:23:21,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772267812] [2021-05-22 02:23:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:21,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772267812] [2021-05-22 02:23:21,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772267812] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:21,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:21,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:21,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170230042] [2021-05-22 02:23:21,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:21,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:21,961 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) [2021-05-22 02:23:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,088 INFO L93 Difference]: Finished difference Result 342 states and 965 transitions. [2021-05-22 02:23:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:22,089 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 [2021-05-22 02:23:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,090 INFO L225 Difference]: With dead ends: 342 [2021-05-22 02:23:22,090 INFO L226 Difference]: Without dead ends: 327 [2021-05-22 02:23:22,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-22 02:23:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-05-22 02:23:22,093 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) [2021-05-22 02:23:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-22 02:23:22,094 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-22 02:23:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,094 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-22 02:23:22,094 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) [2021-05-22 02:23:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-22 02:23:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:22,095 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,095 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-22 02:23:22,095 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1057121422, now seen corresponding path program 31 times [2021-05-22 02:23:22,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090821656] [2021-05-22 02:23:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090821656] [2021-05-22 02:23:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090821656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339522624] [2021-05-22 02:23:22,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:22,165 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) [2021-05-22 02:23:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,342 INFO L93 Difference]: Finished difference Result 377 states and 1036 transitions. [2021-05-22 02:23:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:22,342 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 [2021-05-22 02:23:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,343 INFO L225 Difference]: With dead ends: 377 [2021-05-22 02:23:22,343 INFO L226 Difference]: Without dead ends: 362 [2021-05-22 02:23:22,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-22 02:23:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-05-22 02:23:22,347 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) [2021-05-22 02:23:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-05-22 02:23:22,348 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-05-22 02:23:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,348 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-05-22 02:23:22,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-05-22 02:23:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:22,349 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,349 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-22 02:23:22,349 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2030292802, now seen corresponding path program 32 times [2021-05-22 02:23:22,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561031908] [2021-05-22 02:23:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561031908] [2021-05-22 02:23:22,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561031908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:22,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759184111] [2021-05-22 02:23:22,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:22,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:22,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:22,406 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) [2021-05-22 02:23:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,569 INFO L93 Difference]: Finished difference Result 386 states and 1062 transitions. [2021-05-22 02:23:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:22,570 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 [2021-05-22 02:23:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,571 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:23:22,571 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:23:22,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:23:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-05-22 02:23:22,575 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) [2021-05-22 02:23:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-05-22 02:23:22,575 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-05-22 02:23:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,576 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-05-22 02:23:22,576 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) [2021-05-22 02:23:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-05-22 02:23:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:22,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-22 02:23:22,576 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,577 INFO L82 PathProgramCache]: Analyzing trace with hash 565954106, now seen corresponding path program 33 times [2021-05-22 02:23:22,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556992489] [2021-05-22 02:23:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556992489] [2021-05-22 02:23:22,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556992489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081622918] [2021-05-22 02:23:22,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:22,634 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) [2021-05-22 02:23:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,810 INFO L93 Difference]: Finished difference Result 393 states and 1078 transitions. [2021-05-22 02:23:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:22,815 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 [2021-05-22 02:23:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,816 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:23:22,816 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:23:22,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:23:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-05-22 02:23:22,821 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) [2021-05-22 02:23:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-22 02:23:22,821 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-22 02:23:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,821 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-22 02:23:22,822 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) [2021-05-22 02:23:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-22 02:23:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:22,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,822 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-22 02:23:22,822 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2049664750, now seen corresponding path program 34 times [2021-05-22 02:23:22,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112141421] [2021-05-22 02:23:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112141421] [2021-05-22 02:23:22,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112141421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:22,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:22,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206427690] [2021-05-22 02:23:22,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:22,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:22,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:22,868 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) [2021-05-22 02:23:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:22,979 INFO L93 Difference]: Finished difference Result 438 states and 1184 transitions. [2021-05-22 02:23:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:22,981 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 [2021-05-22 02:23:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:22,982 INFO L225 Difference]: With dead ends: 438 [2021-05-22 02:23:22,982 INFO L226 Difference]: Without dead ends: 423 [2021-05-22 02:23:22,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-22 02:23:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-05-22 02:23:22,987 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) [2021-05-22 02:23:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-05-22 02:23:22,988 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-05-22 02:23:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:22,988 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-05-22 02:23:22,988 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) [2021-05-22 02:23:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-05-22 02:23:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:22,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:22,988 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-22 02:23:22,989 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash 278392308, now seen corresponding path program 35 times [2021-05-22 02:23:22,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642315591] [2021-05-22 02:23:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642315591] [2021-05-22 02:23:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642315591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731475896] [2021-05-22 02:23:23,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,045 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) [2021-05-22 02:23:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,182 INFO L93 Difference]: Finished difference Result 433 states and 1175 transitions. [2021-05-22 02:23:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,182 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 [2021-05-22 02:23:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,184 INFO L225 Difference]: With dead ends: 433 [2021-05-22 02:23:23,184 INFO L226 Difference]: Without dead ends: 418 [2021-05-22 02:23:23,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-22 02:23:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-05-22 02:23:23,189 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) [2021-05-22 02:23:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-05-22 02:23:23,189 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-05-22 02:23:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,189 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-05-22 02:23:23,189 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) [2021-05-22 02:23:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-05-22 02:23:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,190 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,190 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-22 02:23:23,190 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1347392328, now seen corresponding path program 36 times [2021-05-22 02:23:23,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814051316] [2021-05-22 02:23:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814051316] [2021-05-22 02:23:23,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814051316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500250007] [2021-05-22 02:23:23,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,242 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) [2021-05-22 02:23:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,368 INFO L93 Difference]: Finished difference Result 416 states and 1145 transitions. [2021-05-22 02:23:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,368 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 [2021-05-22 02:23:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,370 INFO L225 Difference]: With dead ends: 416 [2021-05-22 02:23:23,370 INFO L226 Difference]: Without dead ends: 401 [2021-05-22 02:23:23,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-22 02:23:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-05-22 02:23:23,375 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) [2021-05-22 02:23:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-22 02:23:23,375 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-22 02:23:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,376 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-22 02:23:23,376 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) [2021-05-22 02:23:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-22 02:23:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-22 02:23:23,377 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1040697164, now seen corresponding path program 37 times [2021-05-22 02:23:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37066314] [2021-05-22 02:23:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37066314] [2021-05-22 02:23:23,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37066314] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47105275] [2021-05-22 02:23:23,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,424 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) [2021-05-22 02:23:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,560 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-22 02:23:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,561 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 [2021-05-22 02:23:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,563 INFO L225 Difference]: With dead ends: 437 [2021-05-22 02:23:23,563 INFO L226 Difference]: Without dead ends: 422 [2021-05-22 02:23:23,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-22 02:23:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-05-22 02:23:23,568 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) [2021-05-22 02:23:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-22 02:23:23,568 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-22 02:23:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,568 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-22 02:23:23,569 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) [2021-05-22 02:23:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-22 02:23:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,569 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-22 02:23:23,569 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2035634772, now seen corresponding path program 38 times [2021-05-22 02:23:23,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524643187] [2021-05-22 02:23:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524643187] [2021-05-22 02:23:23,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524643187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170416190] [2021-05-22 02:23:23,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,638 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) [2021-05-22 02:23:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,754 INFO L93 Difference]: Finished difference Result 435 states and 1194 transitions. [2021-05-22 02:23:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,755 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 [2021-05-22 02:23:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,756 INFO L225 Difference]: With dead ends: 435 [2021-05-22 02:23:23,756 INFO L226 Difference]: Without dead ends: 420 [2021-05-22 02:23:23,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-22 02:23:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-05-22 02:23:23,761 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) [2021-05-22 02:23:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-22 02:23:23,761 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-22 02:23:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,762 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-22 02:23:23,762 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) [2021-05-22 02:23:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-22 02:23:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:23,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,762 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-22 02:23:23,762 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,763 INFO L82 PathProgramCache]: Analyzing trace with hash -51636616, now seen corresponding path program 39 times [2021-05-22 02:23:23,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168622067] [2021-05-22 02:23:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168622067] [2021-05-22 02:23:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168622067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:23,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:23,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:23,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673061582] [2021-05-22 02:23:23,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:23,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:23,825 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) [2021-05-22 02:23:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,993 INFO L93 Difference]: Finished difference Result 468 states and 1258 transitions. [2021-05-22 02:23:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:23,994 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 [2021-05-22 02:23:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,995 INFO L225 Difference]: With dead ends: 468 [2021-05-22 02:23:23,995 INFO L226 Difference]: Without dead ends: 453 [2021-05-22 02:23:23,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-22 02:23:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-05-22 02:23:24,000 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) [2021-05-22 02:23:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-05-22 02:23:24,001 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-05-22 02:23:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,001 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-05-22 02:23:24,001 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) [2021-05-22 02:23:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-05-22 02:23:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,002 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,002 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-22 02:23:24,002 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1221825612, now seen corresponding path program 40 times [2021-05-22 02:23:24,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410345642] [2021-05-22 02:23:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410345642] [2021-05-22 02:23:24,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410345642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920955719] [2021-05-22 02:23:24,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,054 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) [2021-05-22 02:23:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,202 INFO L93 Difference]: Finished difference Result 452 states and 1235 transitions. [2021-05-22 02:23:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,203 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 [2021-05-22 02:23:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,204 INFO L225 Difference]: With dead ends: 452 [2021-05-22 02:23:24,204 INFO L226 Difference]: Without dead ends: 437 [2021-05-22 02:23:24,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-22 02:23:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-05-22 02:23:24,209 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) [2021-05-22 02:23:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-22 02:23:24,209 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-22 02:23:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,210 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-22 02:23:24,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-22 02:23:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,210 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-22 02:23:24,210 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1238762664, now seen corresponding path program 41 times [2021-05-22 02:23:24,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621705184] [2021-05-22 02:23:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621705184] [2021-05-22 02:23:24,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621705184] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552939961] [2021-05-22 02:23:24,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,305 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) [2021-05-22 02:23:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,424 INFO L93 Difference]: Finished difference Result 446 states and 1215 transitions. [2021-05-22 02:23:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,425 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 [2021-05-22 02:23:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,426 INFO L225 Difference]: With dead ends: 446 [2021-05-22 02:23:24,426 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:23:24,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:23:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-05-22 02:23:24,431 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) [2021-05-22 02:23:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-22 02:23:24,431 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-22 02:23:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,431 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-22 02:23:24,431 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) [2021-05-22 02:23:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-22 02:23:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,432 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-22 02:23:24,432 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash -98478828, now seen corresponding path program 42 times [2021-05-22 02:23:24,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384225035] [2021-05-22 02:23:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384225035] [2021-05-22 02:23:24,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384225035] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645739954] [2021-05-22 02:23:24,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,481 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) [2021-05-22 02:23:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,603 INFO L93 Difference]: Finished difference Result 425 states and 1177 transitions. [2021-05-22 02:23:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,604 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 [2021-05-22 02:23:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,604 INFO L225 Difference]: With dead ends: 425 [2021-05-22 02:23:24,604 INFO L226 Difference]: Without dead ends: 410 [2021-05-22 02:23:24,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-22 02:23:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-05-22 02:23:24,608 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) [2021-05-22 02:23:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-05-22 02:23:24,608 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-05-22 02:23:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,608 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-05-22 02:23:24,608 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) [2021-05-22 02:23:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-05-22 02:23:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-22 02:23:24,609 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash -485249606, now seen corresponding path program 43 times [2021-05-22 02:23:24,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076838431] [2021-05-22 02:23:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076838431] [2021-05-22 02:23:24,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076838431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171094962] [2021-05-22 02:23:24,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,663 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) [2021-05-22 02:23:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,759 INFO L93 Difference]: Finished difference Result 323 states and 889 transitions. [2021-05-22 02:23:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,760 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 [2021-05-22 02:23:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,760 INFO L225 Difference]: With dead ends: 323 [2021-05-22 02:23:24,760 INFO L226 Difference]: Without dead ends: 308 [2021-05-22 02:23:24,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-22 02:23:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-05-22 02:23:24,764 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) [2021-05-22 02:23:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-05-22 02:23:24,765 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-05-22 02:23:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,765 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-05-22 02:23:24,765 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) [2021-05-22 02:23:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-05-22 02:23:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-22 02:23:24,766 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2038445248, now seen corresponding path program 44 times [2021-05-22 02:23:24,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190696853] [2021-05-22 02:23:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190696853] [2021-05-22 02:23:24,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190696853] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:24,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:24,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:24,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056770187] [2021-05-22 02:23:24,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:24,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:24,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:24,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:24,819 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) [2021-05-22 02:23:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,950 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-22 02:23:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:24,951 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 [2021-05-22 02:23:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,952 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:23:24,952 INFO L226 Difference]: Without dead ends: 338 [2021-05-22 02:23:24,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-22 02:23:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-05-22 02:23:24,957 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) [2021-05-22 02:23:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-05-22 02:23:24,957 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-05-22 02:23:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,957 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-05-22 02:23:24,957 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) [2021-05-22 02:23:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-05-22 02:23:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:24,958 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,958 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-22 02:23:24,958 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,959 INFO L82 PathProgramCache]: Analyzing trace with hash 412660612, now seen corresponding path program 45 times [2021-05-22 02:23:24,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166906530] [2021-05-22 02:23:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166906530] [2021-05-22 02:23:25,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166906530] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928223951] [2021-05-22 02:23:25,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,003 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) [2021-05-22 02:23:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,123 INFO L93 Difference]: Finished difference Result 336 states and 921 transitions. [2021-05-22 02:23:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,124 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 [2021-05-22 02:23:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,124 INFO L225 Difference]: With dead ends: 336 [2021-05-22 02:23:25,124 INFO L226 Difference]: Without dead ends: 321 [2021-05-22 02:23:25,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-22 02:23:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-05-22 02:23:25,128 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) [2021-05-22 02:23:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-05-22 02:23:25,129 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-05-22 02:23:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,129 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-05-22 02:23:25,129 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) [2021-05-22 02:23:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-05-22 02:23:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-22 02:23:25,130 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 379489126, now seen corresponding path program 46 times [2021-05-22 02:23:25,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76211415] [2021-05-22 02:23:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76211415] [2021-05-22 02:23:25,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76211415] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670249265] [2021-05-22 02:23:25,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,182 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) [2021-05-22 02:23:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,279 INFO L93 Difference]: Finished difference Result 324 states and 889 transitions. [2021-05-22 02:23:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,286 INFO L225 Difference]: With dead ends: 324 [2021-05-22 02:23:25,286 INFO L226 Difference]: Without dead ends: 309 [2021-05-22 02:23:25,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-22 02:23:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-05-22 02:23:25,289 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) [2021-05-22 02:23:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-22 02:23:25,290 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-22 02:23:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,290 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-22 02:23:25,290 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) [2021-05-22 02:23:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-22 02:23:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-22 02:23:25,291 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1252190110, now seen corresponding path program 47 times [2021-05-22 02:23:25,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96286603] [2021-05-22 02:23:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96286603] [2021-05-22 02:23:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96286603] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541214329] [2021-05-22 02:23:25,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,343 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) [2021-05-22 02:23:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,463 INFO L93 Difference]: Finished difference Result 354 states and 954 transitions. [2021-05-22 02:23:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,463 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 [2021-05-22 02:23:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,464 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:23:25,464 INFO L226 Difference]: Without dead ends: 339 [2021-05-22 02:23:25,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-22 02:23:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-05-22 02:23:25,470 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) [2021-05-22 02:23:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-05-22 02:23:25,471 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-05-22 02:23:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,471 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-05-22 02:23:25,471 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) [2021-05-22 02:23:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-05-22 02:23:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,471 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,471 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-22 02:23:25,471 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1416992550, now seen corresponding path program 48 times [2021-05-22 02:23:25,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719438706] [2021-05-22 02:23:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719438706] [2021-05-22 02:23:25,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719438706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857622755] [2021-05-22 02:23:25,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,540 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) [2021-05-22 02:23:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,681 INFO L93 Difference]: Finished difference Result 333 states and 916 transitions. [2021-05-22 02:23:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,682 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 [2021-05-22 02:23:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,683 INFO L225 Difference]: With dead ends: 333 [2021-05-22 02:23:25,683 INFO L226 Difference]: Without dead ends: 318 [2021-05-22 02:23:25,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-22 02:23:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-05-22 02:23:25,687 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) [2021-05-22 02:23:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-22 02:23:25,687 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-22 02:23:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,687 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-22 02:23:25,688 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) [2021-05-22 02:23:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-22 02:23:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,688 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-22 02:23:25,688 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -167418646, now seen corresponding path program 49 times [2021-05-22 02:23:25,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177537884] [2021-05-22 02:23:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177537884] [2021-05-22 02:23:25,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177537884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256878638] [2021-05-22 02:23:25,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,738 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) [2021-05-22 02:23:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,871 INFO L93 Difference]: Finished difference Result 386 states and 1068 transitions. [2021-05-22 02:23:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:25,871 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 [2021-05-22 02:23:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,872 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:23:25,872 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:23:25,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:23:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-05-22 02:23:25,877 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) [2021-05-22 02:23:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-05-22 02:23:25,877 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-05-22 02:23:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,877 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-05-22 02:23:25,877 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) [2021-05-22 02:23:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-05-22 02:23:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:25,878 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,878 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-22 02:23:25,878 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1386054006, now seen corresponding path program 50 times [2021-05-22 02:23:25,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218046582] [2021-05-22 02:23:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218046582] [2021-05-22 02:23:25,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218046582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:25,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:25,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:25,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406760388] [2021-05-22 02:23:25,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:25,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:25,934 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) [2021-05-22 02:23:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,052 INFO L93 Difference]: Finished difference Result 390 states and 1074 transitions. [2021-05-22 02:23:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,053 INFO L225 Difference]: With dead ends: 390 [2021-05-22 02:23:26,053 INFO L226 Difference]: Without dead ends: 375 [2021-05-22 02:23:26,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-22 02:23:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-05-22 02:23:26,057 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) [2021-05-22 02:23:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:26,057 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,057 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:26,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,058 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-22 02:23:26,058 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,058 INFO L82 PathProgramCache]: Analyzing trace with hash -310342850, now seen corresponding path program 51 times [2021-05-22 02:23:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586010336] [2021-05-22 02:23:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586010336] [2021-05-22 02:23:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586010336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583140168] [2021-05-22 02:23:26,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,110 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) [2021-05-22 02:23:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,221 INFO L93 Difference]: Finished difference Result 386 states and 1060 transitions. [2021-05-22 02:23:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,221 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 [2021-05-22 02:23:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,222 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:23:26,222 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:23:26,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:23:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-05-22 02:23:26,226 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) [2021-05-22 02:23:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:26,227 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,227 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:26,227 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) [2021-05-22 02:23:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-22 02:23:26,227 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash -548101402, now seen corresponding path program 52 times [2021-05-22 02:23:26,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313116521] [2021-05-22 02:23:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313116521] [2021-05-22 02:23:26,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313116521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370598137] [2021-05-22 02:23:26,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,271 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) [2021-05-22 02:23:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,420 INFO L93 Difference]: Finished difference Result 464 states and 1256 transitions. [2021-05-22 02:23:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,420 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 [2021-05-22 02:23:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,421 INFO L225 Difference]: With dead ends: 464 [2021-05-22 02:23:26,421 INFO L226 Difference]: Without dead ends: 449 [2021-05-22 02:23:26,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-22 02:23:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-05-22 02:23:26,429 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) [2021-05-22 02:23:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-22 02:23:26,429 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-22 02:23:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,429 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-22 02:23:26,429 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) [2021-05-22 02:23:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-22 02:23:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,430 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-22 02:23:26,430 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1766736762, now seen corresponding path program 53 times [2021-05-22 02:23:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070952231] [2021-05-22 02:23:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070952231] [2021-05-22 02:23:26,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070952231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108026103] [2021-05-22 02:23:26,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,488 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) [2021-05-22 02:23:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,614 INFO L93 Difference]: Finished difference Result 468 states and 1262 transitions. [2021-05-22 02:23:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,614 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 [2021-05-22 02:23:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,615 INFO L225 Difference]: With dead ends: 468 [2021-05-22 02:23:26,615 INFO L226 Difference]: Without dead ends: 453 [2021-05-22 02:23:26,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-22 02:23:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-05-22 02:23:26,619 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) [2021-05-22 02:23:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-22 02:23:26,620 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-22 02:23:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,620 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-22 02:23:26,620 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) [2021-05-22 02:23:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-22 02:23:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-22 02:23:26,621 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 440959146, now seen corresponding path program 54 times [2021-05-22 02:23:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764389749] [2021-05-22 02:23:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764389749] [2021-05-22 02:23:26,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764389749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398343345] [2021-05-22 02:23:26,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,669 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) [2021-05-22 02:23:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,826 INFO L93 Difference]: Finished difference Result 431 states and 1182 transitions. [2021-05-22 02:23:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:26,826 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 [2021-05-22 02:23:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,827 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:23:26,827 INFO L226 Difference]: Without dead ends: 416 [2021-05-22 02:23:26,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-22 02:23:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-05-22 02:23:26,831 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) [2021-05-22 02:23:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-05-22 02:23:26,831 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-05-22 02:23:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,832 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-05-22 02:23:26,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-05-22 02:23:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:26,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,832 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:26,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-22 02:23:26,833 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash -729229850, now seen corresponding path program 55 times [2021-05-22 02:23:26,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:26,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077549272] [2021-05-22 02:23:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:26,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077549272] [2021-05-22 02:23:26,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077549272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:26,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:26,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:26,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841917082] [2021-05-22 02:23:26,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:26,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:26,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:26,885 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) [2021-05-22 02:23:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,040 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-05-22 02:23:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,040 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 [2021-05-22 02:23:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,041 INFO L225 Difference]: With dead ends: 415 [2021-05-22 02:23:27,041 INFO L226 Difference]: Without dead ends: 400 [2021-05-22 02:23:27,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-22 02:23:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-05-22 02:23:27,044 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) [2021-05-22 02:23:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-22 02:23:27,044 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-22 02:23:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,044 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-22 02:23:27,044 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) [2021-05-22 02:23:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-22 02:23:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-22 02:23:27,045 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash -746166902, now seen corresponding path program 56 times [2021-05-22 02:23:27,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655389157] [2021-05-22 02:23:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655389157] [2021-05-22 02:23:27,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655389157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667126006] [2021-05-22 02:23:27,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,095 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) [2021-05-22 02:23:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,248 INFO L93 Difference]: Finished difference Result 449 states and 1229 transitions. [2021-05-22 02:23:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,249 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 [2021-05-22 02:23:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,250 INFO L225 Difference]: With dead ends: 449 [2021-05-22 02:23:27,250 INFO L226 Difference]: Without dead ends: 434 [2021-05-22 02:23:27,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-22 02:23:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-05-22 02:23:27,254 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) [2021-05-22 02:23:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-22 02:23:27,255 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-22 02:23:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,255 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-22 02:23:27,255 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) [2021-05-22 02:23:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-22 02:23:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,255 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-22 02:23:27,256 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash 394116934, now seen corresponding path program 57 times [2021-05-22 02:23:27,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263552779] [2021-05-22 02:23:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263552779] [2021-05-22 02:23:27,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263552779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820773378] [2021-05-22 02:23:27,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,309 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) [2021-05-22 02:23:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,423 INFO L93 Difference]: Finished difference Result 428 states and 1191 transitions. [2021-05-22 02:23:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,423 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 [2021-05-22 02:23:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,424 INFO L225 Difference]: With dead ends: 428 [2021-05-22 02:23:27,424 INFO L226 Difference]: Without dead ends: 413 [2021-05-22 02:23:27,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-22 02:23:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-05-22 02:23:27,428 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) [2021-05-22 02:23:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:27,428 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,429 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:27,429 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) [2021-05-22 02:23:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,429 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,429 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-22 02:23:27,429 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1262551738, now seen corresponding path program 58 times [2021-05-22 02:23:27,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839813272] [2021-05-22 02:23:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839813272] [2021-05-22 02:23:27,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839813272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884813852] [2021-05-22 02:23:27,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,480 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) [2021-05-22 02:23:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,584 INFO L93 Difference]: Finished difference Result 429 states and 1161 transitions. [2021-05-22 02:23:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,584 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 [2021-05-22 02:23:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,585 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:23:27,585 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:23:27,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:23:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-05-22 02:23:27,589 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) [2021-05-22 02:23:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-05-22 02:23:27,590 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-05-22 02:23:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,590 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-05-22 02:23:27,590 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) [2021-05-22 02:23:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-05-22 02:23:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,591 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,591 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-22 02:23:27,591 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2074864322, now seen corresponding path program 59 times [2021-05-22 02:23:27,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194354867] [2021-05-22 02:23:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194354867] [2021-05-22 02:23:27,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194354867] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333633719] [2021-05-22 02:23:27,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,640 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) [2021-05-22 02:23:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,782 INFO L93 Difference]: Finished difference Result 430 states and 1172 transitions. [2021-05-22 02:23:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,783 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 [2021-05-22 02:23:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,784 INFO L225 Difference]: With dead ends: 430 [2021-05-22 02:23:27,784 INFO L226 Difference]: Without dead ends: 415 [2021-05-22 02:23:27,784 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 [2021-05-22 02:23:27,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-22 02:23:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-05-22 02:23:27,788 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) [2021-05-22 02:23:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-05-22 02:23:27,789 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-05-22 02:23:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,789 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-05-22 02:23:27,789 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) [2021-05-22 02:23:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-05-22 02:23:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-22 02:23:27,790 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash -934580486, now seen corresponding path program 60 times [2021-05-22 02:23:27,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945021701] [2021-05-22 02:23:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945021701] [2021-05-22 02:23:27,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945021701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:27,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:27,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:27,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637935814] [2021-05-22 02:23:27,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:27,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:27,845 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) [2021-05-22 02:23:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,968 INFO L93 Difference]: Finished difference Result 409 states and 1134 transitions. [2021-05-22 02:23:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:27,968 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 [2021-05-22 02:23:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,969 INFO L225 Difference]: With dead ends: 409 [2021-05-22 02:23:27,969 INFO L226 Difference]: Without dead ends: 394 [2021-05-22 02:23:27,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-22 02:23:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-05-22 02:23:27,972 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) [2021-05-22 02:23:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-22 02:23:27,973 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-22 02:23:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,973 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-22 02:23:27,973 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) [2021-05-22 02:23:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-22 02:23:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:27,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-22 02:23:27,973 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,974 INFO L82 PathProgramCache]: Analyzing trace with hash -674451760, now seen corresponding path program 61 times [2021-05-22 02:23:27,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863004075] [2021-05-22 02:23:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863004075] [2021-05-22 02:23:28,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863004075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277145783] [2021-05-22 02:23:28,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,026 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) [2021-05-22 02:23:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,126 INFO L93 Difference]: Finished difference Result 328 states and 903 transitions. [2021-05-22 02:23:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,126 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 [2021-05-22 02:23:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,127 INFO L225 Difference]: With dead ends: 328 [2021-05-22 02:23:28,127 INFO L226 Difference]: Without dead ends: 313 [2021-05-22 02:23:28,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-22 02:23:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-05-22 02:23:28,130 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) [2021-05-22 02:23:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-22 02:23:28,130 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-22 02:23:28,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,131 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-22 02:23:28,131 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) [2021-05-22 02:23:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-22 02:23:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,131 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-22 02:23:28,131 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1924375180, now seen corresponding path program 62 times [2021-05-22 02:23:28,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727302413] [2021-05-22 02:23:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727302413] [2021-05-22 02:23:28,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727302413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082704039] [2021-05-22 02:23:28,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,181 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) [2021-05-22 02:23:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,326 INFO L93 Difference]: Finished difference Result 357 states and 963 transitions. [2021-05-22 02:23:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,327 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 [2021-05-22 02:23:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,327 INFO L225 Difference]: With dead ends: 357 [2021-05-22 02:23:28,327 INFO L226 Difference]: Without dead ends: 342 [2021-05-22 02:23:28,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-22 02:23:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-05-22 02:23:28,330 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) [2021-05-22 02:23:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-22 02:23:28,331 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-22 02:23:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,331 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-22 02:23:28,331 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) [2021-05-22 02:23:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-22 02:23:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,331 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-22 02:23:28,332 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1151956756, now seen corresponding path program 63 times [2021-05-22 02:23:28,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240933044] [2021-05-22 02:23:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240933044] [2021-05-22 02:23:28,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240933044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290373317] [2021-05-22 02:23:28,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,384 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) [2021-05-22 02:23:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,518 INFO L93 Difference]: Finished difference Result 334 states and 918 transitions. [2021-05-22 02:23:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,518 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 [2021-05-22 02:23:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,519 INFO L225 Difference]: With dead ends: 334 [2021-05-22 02:23:28,519 INFO L226 Difference]: Without dead ends: 319 [2021-05-22 02:23:28,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-22 02:23:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-05-22 02:23:28,521 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) [2021-05-22 02:23:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:28,522 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,522 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:28,522 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) [2021-05-22 02:23:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,522 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,522 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-22 02:23:28,523 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash 263807996, now seen corresponding path program 64 times [2021-05-22 02:23:28,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008154509] [2021-05-22 02:23:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008154509] [2021-05-22 02:23:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008154509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761076170] [2021-05-22 02:23:28,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,582 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) [2021-05-22 02:23:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,699 INFO L93 Difference]: Finished difference Result 349 states and 945 transitions. [2021-05-22 02:23:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,700 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 [2021-05-22 02:23:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,700 INFO L225 Difference]: With dead ends: 349 [2021-05-22 02:23:28,700 INFO L226 Difference]: Without dead ends: 334 [2021-05-22 02:23:28,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-22 02:23:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-05-22 02:23:28,703 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) [2021-05-22 02:23:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-22 02:23:28,704 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-22 02:23:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,704 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-22 02:23:28,704 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) [2021-05-22 02:23:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-22 02:23:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,705 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,705 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-22 02:23:28,705 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash -954827364, now seen corresponding path program 65 times [2021-05-22 02:23:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915205876] [2021-05-22 02:23:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915205876] [2021-05-22 02:23:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915205876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919583367] [2021-05-22 02:23:28,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,755 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) [2021-05-22 02:23:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,879 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-22 02:23:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:28,879 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 [2021-05-22 02:23:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,880 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:23:28,880 INFO L226 Difference]: Without dead ends: 338 [2021-05-22 02:23:28,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-22 02:23:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-05-22 02:23:28,883 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) [2021-05-22 02:23:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-22 02:23:28,884 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-22 02:23:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,884 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-22 02:23:28,884 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) [2021-05-22 02:23:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-22 02:23:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:28,885 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,885 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-22 02:23:28,885 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash 120883792, now seen corresponding path program 66 times [2021-05-22 02:23:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928070272] [2021-05-22 02:23:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928070272] [2021-05-22 02:23:28,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928070272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:28,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:28,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:28,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128533877] [2021-05-22 02:23:28,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:28,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:28,939 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) [2021-05-22 02:23:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,040 INFO L93 Difference]: Finished difference Result 324 states and 891 transitions. [2021-05-22 02:23:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,041 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 [2021-05-22 02:23:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,041 INFO L225 Difference]: With dead ends: 324 [2021-05-22 02:23:29,041 INFO L226 Difference]: Without dead ends: 309 [2021-05-22 02:23:29,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-22 02:23:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-05-22 02:23:29,044 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) [2021-05-22 02:23:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:29,045 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,045 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:29,045 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) [2021-05-22 02:23:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-22 02:23:29,045 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,046 INFO L82 PathProgramCache]: Analyzing trace with hash 409284692, now seen corresponding path program 67 times [2021-05-22 02:23:29,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431585309] [2021-05-22 02:23:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431585309] [2021-05-22 02:23:29,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431585309] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317153317] [2021-05-22 02:23:29,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,093 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) [2021-05-22 02:23:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,187 INFO L93 Difference]: Finished difference Result 442 states and 1201 transitions. [2021-05-22 02:23:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,188 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 [2021-05-22 02:23:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,189 INFO L225 Difference]: With dead ends: 442 [2021-05-22 02:23:29,189 INFO L226 Difference]: Without dead ends: 427 [2021-05-22 02:23:29,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-22 02:23:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-05-22 02:23:29,194 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) [2021-05-22 02:23:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-22 02:23:29,194 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-22 02:23:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,194 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-22 02:23:29,194 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) [2021-05-22 02:23:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-22 02:23:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,195 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-22 02:23:29,195 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash -840638728, now seen corresponding path program 68 times [2021-05-22 02:23:29,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917352198] [2021-05-22 02:23:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917352198] [2021-05-22 02:23:29,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917352198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476077587] [2021-05-22 02:23:29,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,241 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) [2021-05-22 02:23:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,401 INFO L93 Difference]: Finished difference Result 465 states and 1248 transitions. [2021-05-22 02:23:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,401 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 [2021-05-22 02:23:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,402 INFO L225 Difference]: With dead ends: 465 [2021-05-22 02:23:29,402 INFO L226 Difference]: Without dead ends: 450 [2021-05-22 02:23:29,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-22 02:23:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-05-22 02:23:29,406 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) [2021-05-22 02:23:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-22 02:23:29,407 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-22 02:23:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,407 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-22 02:23:29,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-22 02:23:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,408 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-22 02:23:29,408 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2059274088, now seen corresponding path program 69 times [2021-05-22 02:23:29,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984159663] [2021-05-22 02:23:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984159663] [2021-05-22 02:23:29,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984159663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706246822] [2021-05-22 02:23:29,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,467 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) [2021-05-22 02:23:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,614 INFO L93 Difference]: Finished difference Result 442 states and 1203 transitions. [2021-05-22 02:23:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,616 INFO L225 Difference]: With dead ends: 442 [2021-05-22 02:23:29,616 INFO L226 Difference]: Without dead ends: 427 [2021-05-22 02:23:29,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-22 02:23:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-05-22 02:23:29,620 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) [2021-05-22 02:23:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:29,620 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,620 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:29,620 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) [2021-05-22 02:23:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-22 02:23:29,621 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1005390608, now seen corresponding path program 70 times [2021-05-22 02:23:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56633710] [2021-05-22 02:23:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56633710] [2021-05-22 02:23:29,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56633710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043554800] [2021-05-22 02:23:29,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,683 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) [2021-05-22 02:23:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,858 INFO L93 Difference]: Finished difference Result 393 states and 1085 transitions. [2021-05-22 02:23:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:29,859 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 [2021-05-22 02:23:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,859 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:23:29,859 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:23:29,860 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 [2021-05-22 02:23:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:23:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-05-22 02:23:29,863 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) [2021-05-22 02:23:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-22 02:23:29,864 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-22 02:23:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,864 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-22 02:23:29,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-22 02:23:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:29,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-22 02:23:29,865 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash 184219092, now seen corresponding path program 71 times [2021-05-22 02:23:29,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335310378] [2021-05-22 02:23:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:29,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335310378] [2021-05-22 02:23:29,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335310378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:29,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:29,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:29,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423891049] [2021-05-22 02:23:29,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:29,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:29,934 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) [2021-05-22 02:23:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,146 INFO L93 Difference]: Finished difference Result 391 states and 1089 transitions. [2021-05-22 02:23:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,146 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 [2021-05-22 02:23:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,147 INFO L225 Difference]: With dead ends: 391 [2021-05-22 02:23:30,147 INFO L226 Difference]: Without dead ends: 376 [2021-05-22 02:23:30,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-22 02:23:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-05-22 02:23:30,151 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) [2021-05-22 02:23:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-05-22 02:23:30,152 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-05-22 02:23:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,152 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-05-22 02:23:30,152 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) [2021-05-22 02:23:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-05-22 02:23:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,152 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,153 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-22 02:23:30,153 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1514501296, now seen corresponding path program 72 times [2021-05-22 02:23:30,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184211431] [2021-05-22 02:23:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184211431] [2021-05-22 02:23:30,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184211431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848486490] [2021-05-22 02:23:30,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,217 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) [2021-05-22 02:23:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,394 INFO L93 Difference]: Finished difference Result 368 states and 1044 transitions. [2021-05-22 02:23:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,394 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 [2021-05-22 02:23:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,395 INFO L225 Difference]: With dead ends: 368 [2021-05-22 02:23:30,395 INFO L226 Difference]: Without dead ends: 353 [2021-05-22 02:23:30,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-22 02:23:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-05-22 02:23:30,399 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) [2021-05-22 02:23:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:30,400 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,400 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:30,400 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) [2021-05-22 02:23:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-22 02:23:30,401 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 81063412, now seen corresponding path program 73 times [2021-05-22 02:23:30,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945042282] [2021-05-22 02:23:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945042282] [2021-05-22 02:23:30,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945042282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616602038] [2021-05-22 02:23:30,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,447 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) [2021-05-22 02:23:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,593 INFO L93 Difference]: Finished difference Result 445 states and 1229 transitions. [2021-05-22 02:23:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,594 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 [2021-05-22 02:23:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,595 INFO L225 Difference]: With dead ends: 445 [2021-05-22 02:23:30,595 INFO L226 Difference]: Without dead ends: 430 [2021-05-22 02:23:30,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-22 02:23:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-05-22 02:23:30,600 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) [2021-05-22 02:23:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:30,600 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,600 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:30,601 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) [2021-05-22 02:23:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,601 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,601 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-22 02:23:30,601 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1137571948, now seen corresponding path program 74 times [2021-05-22 02:23:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68380298] [2021-05-22 02:23:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68380298] [2021-05-22 02:23:30,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68380298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066194578] [2021-05-22 02:23:30,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,653 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) [2021-05-22 02:23:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,818 INFO L93 Difference]: Finished difference Result 443 states and 1222 transitions. [2021-05-22 02:23:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:30,819 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 [2021-05-22 02:23:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,820 INFO L225 Difference]: With dead ends: 443 [2021-05-22 02:23:30,820 INFO L226 Difference]: Without dead ends: 428 [2021-05-22 02:23:30,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-22 02:23:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-05-22 02:23:30,825 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) [2021-05-22 02:23:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:30,825 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,825 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:30,825 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) [2021-05-22 02:23:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:30,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,826 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:30,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-22 02:23:30,826 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:30,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1070123960, now seen corresponding path program 75 times [2021-05-22 02:23:30,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:30,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017494785] [2021-05-22 02:23:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017494785] [2021-05-22 02:23:30,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017494785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:30,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:30,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:30,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404890320] [2021-05-22 02:23:30,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:30,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:30,888 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) [2021-05-22 02:23:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,080 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-22 02:23:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,080 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 [2021-05-22 02:23:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,081 INFO L225 Difference]: With dead ends: 437 [2021-05-22 02:23:31,081 INFO L226 Difference]: Without dead ends: 422 [2021-05-22 02:23:31,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-22 02:23:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-05-22 02:23:31,085 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) [2021-05-22 02:23:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-22 02:23:31,086 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-22 02:23:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,086 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-22 02:23:31,086 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) [2021-05-22 02:23:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-22 02:23:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,087 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-22 02:23:31,087 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash -100065036, now seen corresponding path program 76 times [2021-05-22 02:23:31,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920600125] [2021-05-22 02:23:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920600125] [2021-05-22 02:23:31,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920600125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228481923] [2021-05-22 02:23:31,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,152 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) [2021-05-22 02:23:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,310 INFO L93 Difference]: Finished difference Result 421 states and 1178 transitions. [2021-05-22 02:23:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,311 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 [2021-05-22 02:23:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,311 INFO L225 Difference]: With dead ends: 421 [2021-05-22 02:23:31,311 INFO L226 Difference]: Without dead ends: 406 [2021-05-22 02:23:31,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-22 02:23:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-05-22 02:23:31,315 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) [2021-05-22 02:23:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:31,315 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,315 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:31,315 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) [2021-05-22 02:23:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,316 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,316 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-22 02:23:31,316 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,317 INFO L82 PathProgramCache]: Analyzing trace with hash -117002088, now seen corresponding path program 77 times [2021-05-22 02:23:31,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882673521] [2021-05-22 02:23:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882673521] [2021-05-22 02:23:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882673521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310031234] [2021-05-22 02:23:31,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,370 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) [2021-05-22 02:23:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,525 INFO L93 Difference]: Finished difference Result 405 states and 1129 transitions. [2021-05-22 02:23:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,526 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 [2021-05-22 02:23:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,527 INFO L225 Difference]: With dead ends: 405 [2021-05-22 02:23:31,527 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:23:31,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:23:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-05-22 02:23:31,531 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) [2021-05-22 02:23:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:31,531 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,531 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:31,531 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) [2021-05-22 02:23:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-22 02:23:31,532 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1023281748, now seen corresponding path program 78 times [2021-05-22 02:23:31,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390985924] [2021-05-22 02:23:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390985924] [2021-05-22 02:23:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390985924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556743554] [2021-05-22 02:23:31,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,586 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) [2021-05-22 02:23:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,739 INFO L93 Difference]: Finished difference Result 384 states and 1091 transitions. [2021-05-22 02:23:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,739 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 [2021-05-22 02:23:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,740 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:23:31,740 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:23:31,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:23:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-05-22 02:23:31,744 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) [2021-05-22 02:23:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:31,744 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,745 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:31,745 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) [2021-05-22 02:23:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,745 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,745 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-22 02:23:31,745 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1228196736, now seen corresponding path program 79 times [2021-05-22 02:23:31,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895867055] [2021-05-22 02:23:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895867055] [2021-05-22 02:23:31,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895867055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:31,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:31,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:31,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980056540] [2021-05-22 02:23:31,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:31,800 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) [2021-05-22 02:23:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,943 INFO L93 Difference]: Finished difference Result 425 states and 1163 transitions. [2021-05-22 02:23:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:31,943 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 [2021-05-22 02:23:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,944 INFO L225 Difference]: With dead ends: 425 [2021-05-22 02:23:31,944 INFO L226 Difference]: Without dead ends: 410 [2021-05-22 02:23:31,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-22 02:23:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-05-22 02:23:31,947 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) [2021-05-22 02:23:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-22 02:23:31,947 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-22 02:23:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,948 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-22 02:23:31,948 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) [2021-05-22 02:23:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-22 02:23:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:31,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-22 02:23:31,948 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1848135200, now seen corresponding path program 80 times [2021-05-22 02:23:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149931281] [2021-05-22 02:23:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149931281] [2021-05-22 02:23:32,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149931281] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131578153] [2021-05-22 02:23:32,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,005 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) [2021-05-22 02:23:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,141 INFO L93 Difference]: Finished difference Result 429 states and 1169 transitions. [2021-05-22 02:23:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,142 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:23:32,142 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:23:32,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:23:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-05-22 02:23:32,146 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) [2021-05-22 02:23:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-22 02:23:32,147 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-22 02:23:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,147 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-22 02:23:32,147 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) [2021-05-22 02:23:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-22 02:23:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,148 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,148 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-22 02:23:32,148 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1371120940, now seen corresponding path program 81 times [2021-05-22 02:23:32,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532264181] [2021-05-22 02:23:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532264181] [2021-05-22 02:23:32,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532264181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830029834] [2021-05-22 02:23:32,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,200 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) [2021-05-22 02:23:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,335 INFO L93 Difference]: Finished difference Result 429 states and 1163 transitions. [2021-05-22 02:23:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,335 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 [2021-05-22 02:23:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,336 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:23:32,336 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:23:32,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:23:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-05-22 02:23:32,340 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) [2021-05-22 02:23:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:32,341 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,342 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:32,342 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) [2021-05-22 02:23:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,343 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-22 02:23:32,343 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1608879492, now seen corresponding path program 82 times [2021-05-22 02:23:32,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922819395] [2021-05-22 02:23:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922819395] [2021-05-22 02:23:32,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922819395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215328096] [2021-05-22 02:23:32,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,395 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) [2021-05-22 02:23:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,515 INFO L93 Difference]: Finished difference Result 451 states and 1224 transitions. [2021-05-22 02:23:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,515 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 [2021-05-22 02:23:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,516 INFO L225 Difference]: With dead ends: 451 [2021-05-22 02:23:32,516 INFO L226 Difference]: Without dead ends: 436 [2021-05-22 02:23:32,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-22 02:23:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-05-22 02:23:32,519 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) [2021-05-22 02:23:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:32,519 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,520 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:32,520 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) [2021-05-22 02:23:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,520 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,520 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-22 02:23:32,520 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1467452444, now seen corresponding path program 83 times [2021-05-22 02:23:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785100863] [2021-05-22 02:23:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785100863] [2021-05-22 02:23:32,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785100863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797645765] [2021-05-22 02:23:32,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,572 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) [2021-05-22 02:23:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,724 INFO L93 Difference]: Finished difference Result 455 states and 1230 transitions. [2021-05-22 02:23:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,724 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 [2021-05-22 02:23:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,726 INFO L225 Difference]: With dead ends: 455 [2021-05-22 02:23:32,726 INFO L226 Difference]: Without dead ends: 440 [2021-05-22 02:23:32,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-22 02:23:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-05-22 02:23:32,729 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) [2021-05-22 02:23:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:32,730 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,730 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:32,730 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) [2021-05-22 02:23:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,731 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-22 02:23:32,731 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash -619818944, now seen corresponding path program 84 times [2021-05-22 02:23:32,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655492509] [2021-05-22 02:23:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655492509] [2021-05-22 02:23:32,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655492509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:32,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:32,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:32,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882907817] [2021-05-22 02:23:32,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:32,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:32,789 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) [2021-05-22 02:23:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,958 INFO L93 Difference]: Finished difference Result 422 states and 1158 transitions. [2021-05-22 02:23:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:32,958 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 [2021-05-22 02:23:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,959 INFO L225 Difference]: With dead ends: 422 [2021-05-22 02:23:32,960 INFO L226 Difference]: Without dead ends: 407 [2021-05-22 02:23:32,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-22 02:23:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-05-22 02:23:32,964 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) [2021-05-22 02:23:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-22 02:23:32,964 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-22 02:23:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,964 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-22 02:23:32,964 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) [2021-05-22 02:23:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-22 02:23:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:32,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-22 02:23:32,965 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1790007940, now seen corresponding path program 85 times [2021-05-22 02:23:32,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191561758] [2021-05-22 02:23:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191561758] [2021-05-22 02:23:33,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191561758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312618280] [2021-05-22 02:23:33,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,018 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) [2021-05-22 02:23:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,199 INFO L93 Difference]: Finished difference Result 406 states and 1135 transitions. [2021-05-22 02:23:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,199 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 [2021-05-22 02:23:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,200 INFO L225 Difference]: With dead ends: 406 [2021-05-22 02:23:33,200 INFO L226 Difference]: Without dead ends: 391 [2021-05-22 02:23:33,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-22 02:23:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-05-22 02:23:33,204 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) [2021-05-22 02:23:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-22 02:23:33,204 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-22 02:23:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,205 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-22 02:23:33,205 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) [2021-05-22 02:23:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-22 02:23:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,205 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-22 02:23:33,205 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1806944992, now seen corresponding path program 86 times [2021-05-22 02:23:33,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214408171] [2021-05-22 02:23:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214408171] [2021-05-22 02:23:33,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214408171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938931513] [2021-05-22 02:23:33,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,265 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) [2021-05-22 02:23:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,416 INFO L93 Difference]: Finished difference Result 440 states and 1205 transitions. [2021-05-22 02:23:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,416 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 [2021-05-22 02:23:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,417 INFO L225 Difference]: With dead ends: 440 [2021-05-22 02:23:33,417 INFO L226 Difference]: Without dead ends: 425 [2021-05-22 02:23:33,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-22 02:23:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-05-22 02:23:33,421 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) [2021-05-22 02:23:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-22 02:23:33,426 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-22 02:23:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,426 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-22 02:23:33,426 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) [2021-05-22 02:23:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-22 02:23:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,427 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,427 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-22 02:23:33,427 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,427 INFO L82 PathProgramCache]: Analyzing trace with hash -666661156, now seen corresponding path program 87 times [2021-05-22 02:23:33,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708535235] [2021-05-22 02:23:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708535235] [2021-05-22 02:23:33,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708535235] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466232074] [2021-05-22 02:23:33,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,481 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) [2021-05-22 02:23:33,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,636 INFO L93 Difference]: Finished difference Result 419 states and 1167 transitions. [2021-05-22 02:23:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,637 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 [2021-05-22 02:23:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,637 INFO L225 Difference]: With dead ends: 419 [2021-05-22 02:23:33,638 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:23:33,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:23:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-05-22 02:23:33,640 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) [2021-05-22 02:23:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-22 02:23:33,641 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-22 02:23:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,641 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-22 02:23:33,641 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) [2021-05-22 02:23:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-22 02:23:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,641 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,641 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-22 02:23:33,641 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash 201773648, now seen corresponding path program 88 times [2021-05-22 02:23:33,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307242722] [2021-05-22 02:23:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307242722] [2021-05-22 02:23:33,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307242722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236058374] [2021-05-22 02:23:33,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,690 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) [2021-05-22 02:23:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,798 INFO L93 Difference]: Finished difference Result 382 states and 1052 transitions. [2021-05-22 02:23:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:33,798 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 [2021-05-22 02:23:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,799 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:23:33,799 INFO L226 Difference]: Without dead ends: 367 [2021-05-22 02:23:33,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-22 02:23:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-05-22 02:23:33,803 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) [2021-05-22 02:23:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-22 02:23:33,803 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-22 02:23:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,804 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-22 02:23:33,804 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) [2021-05-22 02:23:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-22 02:23:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:33,804 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,804 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-22 02:23:33,805 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1159324884, now seen corresponding path program 89 times [2021-05-22 02:23:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634797158] [2021-05-22 02:23:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634797158] [2021-05-22 02:23:33,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634797158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:33,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:33,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:33,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486405124] [2021-05-22 02:23:33,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:33,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:33,854 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) [2021-05-22 02:23:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:34,006 INFO L93 Difference]: Finished difference Result 383 states and 1063 transitions. [2021-05-22 02:23:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:23:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:34,008 INFO L225 Difference]: With dead ends: 383 [2021-05-22 02:23:34,008 INFO L226 Difference]: Without dead ends: 368 [2021-05-22 02:23:34,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-22 02:23:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-05-22 02:23:34,011 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) [2021-05-22 02:23:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-22 02:23:34,012 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-22 02:23:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,012 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-22 02:23:34,012 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) [2021-05-22 02:23:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-22 02:23:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:23:34,013 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,013 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:34,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-22 02:23:34,013 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1995358576, now seen corresponding path program 90 times [2021-05-22 02:23:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:34,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599880533] [2021-05-22 02:23:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:34,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599880533] [2021-05-22 02:23:34,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599880533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:34,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:34,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:34,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261965175] [2021-05-22 02:23:34,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:34,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:34,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:34,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:34,067 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) [2021-05-22 02:23:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:34,226 INFO L93 Difference]: Finished difference Result 362 states and 1025 transitions. [2021-05-22 02:23:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:34,226 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 [2021-05-22 02:23:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:34,227 INFO L225 Difference]: With dead ends: 362 [2021-05-22 02:23:34,227 INFO L226 Difference]: Without dead ends: 347 [2021-05-22 02:23:34,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-22 02:23:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-05-22 02:23:34,233 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) [2021-05-22 02:23:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-22 02:23:34,234 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-22 02:23:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,234 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-22 02:23:34,234 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) [2021-05-22 02:23:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-22 02:23:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:34,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:34,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-22 02:23:34,235 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1303103675, now seen corresponding path program 1 times [2021-05-22 02:23:34,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:34,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147101477] [2021-05-22 02:23:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:34,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147101477] [2021-05-22 02:23:34,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147101477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:34,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563295352] [2021-05-22 02:23:34,309 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 [2021-05-22 02:23:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563295352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:34,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:34,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273692005] [2021-05-22 02:23:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:34,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:34,595 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) [2021-05-22 02:23:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:34,789 INFO L93 Difference]: Finished difference Result 363 states and 1031 transitions. [2021-05-22 02:23:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:34,789 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 [2021-05-22 02:23:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:34,791 INFO L225 Difference]: With dead ends: 363 [2021-05-22 02:23:34,791 INFO L226 Difference]: Without dead ends: 344 [2021-05-22 02:23:34,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-22 02:23:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-05-22 02:23:34,797 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) [2021-05-22 02:23:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-22 02:23:34,797 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 18 [2021-05-22 02:23:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,797 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-22 02:23:34,797 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) [2021-05-22 02:23:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-22 02:23:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:34,798 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,798 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:35,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-22 02:23:35,013 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash -95550603, now seen corresponding path program 2 times [2021-05-22 02:23:35,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:35,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057330660] [2021-05-22 02:23:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:35,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057330660] [2021-05-22 02:23:35,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057330660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977902182] [2021-05-22 02:23:35,071 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 [2021-05-22 02:23:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977902182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:35,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:23:35,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640883902] [2021-05-22 02:23:35,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:23:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:23:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:35,210 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) [2021-05-22 02:23:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:35,387 INFO L93 Difference]: Finished difference Result 405 states and 1139 transitions. [2021-05-22 02:23:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:35,387 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 [2021-05-22 02:23:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:35,388 INFO L225 Difference]: With dead ends: 405 [2021-05-22 02:23:35,388 INFO L226 Difference]: Without dead ends: 386 [2021-05-22 02:23:35,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-22 02:23:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 214. [2021-05-22 02:23:35,394 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) [2021-05-22 02:23:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 640 transitions. [2021-05-22 02:23:35,394 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 640 transitions. Word has length 18 [2021-05-22 02:23:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:35,394 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 640 transitions. [2021-05-22 02:23:35,394 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) [2021-05-22 02:23:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 640 transitions. [2021-05-22 02:23:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:35,395 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:35,395 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:35,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:35,619 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1794270991, now seen corresponding path program 3 times [2021-05-22 02:23:35,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:35,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744011290] [2021-05-22 02:23:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:35,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744011290] [2021-05-22 02:23:35,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744011290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987365389] [2021-05-22 02:23:35,672 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 [2021-05-22 02:23:35,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987365389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:35,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:35,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260992843] [2021-05-22 02:23:35,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:35,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:35,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:35,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:35,799 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) [2021-05-22 02:23:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:35,981 INFO L93 Difference]: Finished difference Result 384 states and 1093 transitions. [2021-05-22 02:23:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:35,981 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 [2021-05-22 02:23:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:35,982 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:23:35,982 INFO L226 Difference]: Without dead ends: 365 [2021-05-22 02:23:35,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-22 02:23:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 206. [2021-05-22 02:23:35,988 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) [2021-05-22 02:23:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 608 transitions. [2021-05-22 02:23:35,989 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 608 transitions. Word has length 18 [2021-05-22 02:23:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:35,989 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 608 transitions. [2021-05-22 02:23:35,989 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) [2021-05-22 02:23:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 608 transitions. [2021-05-22 02:23:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:35,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:35,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:36,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-22 02:23:36,205 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash -605004921, now seen corresponding path program 4 times [2021-05-22 02:23:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:36,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145560623] [2021-05-22 02:23:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:36,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145560623] [2021-05-22 02:23:36,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145560623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794648115] [2021-05-22 02:23:36,261 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 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 [2021-05-22 02:23:36,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:36,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794648115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:36,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:36,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118052530] [2021-05-22 02:23:36,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:36,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:36,372 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) [2021-05-22 02:23:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:36,531 INFO L93 Difference]: Finished difference Result 395 states and 1126 transitions. [2021-05-22 02:23:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:36,532 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 [2021-05-22 02:23:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:36,533 INFO L225 Difference]: With dead ends: 395 [2021-05-22 02:23:36,533 INFO L226 Difference]: Without dead ends: 376 [2021-05-22 02:23:36,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-22 02:23:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 212. [2021-05-22 02:23:36,542 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) [2021-05-22 02:23:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-05-22 02:23:36,542 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 18 [2021-05-22 02:23:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:36,543 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-05-22 02:23:36,543 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) [2021-05-22 02:23:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-05-22 02:23:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:36,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:36,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:36,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-22 02:23:36,757 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -630780405, now seen corresponding path program 5 times [2021-05-22 02:23:36,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:36,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733705401] [2021-05-22 02:23:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:36,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733705401] [2021-05-22 02:23:36,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733705401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428834281] [2021-05-22 02:23:36,803 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 [2021-05-22 02:23:36,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:36,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:36,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428834281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:36,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:36,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406666735] [2021-05-22 02:23:36,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:36,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:36,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:36,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:36,939 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) [2021-05-22 02:23:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:37,099 INFO L93 Difference]: Finished difference Result 437 states and 1235 transitions. [2021-05-22 02:23:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:37,099 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 [2021-05-22 02:23:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:37,100 INFO L225 Difference]: With dead ends: 437 [2021-05-22 02:23:37,100 INFO L226 Difference]: Without dead ends: 418 [2021-05-22 02:23:37,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-22 02:23:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 216. [2021-05-22 02:23:37,107 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) [2021-05-22 02:23:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 651 transitions. [2021-05-22 02:23:37,108 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 651 transitions. Word has length 18 [2021-05-22 02:23:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:37,108 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 651 transitions. [2021-05-22 02:23:37,108 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) [2021-05-22 02:23:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 651 transitions. [2021-05-22 02:23:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:37,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:37,109 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:37,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-22 02:23:37,325 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1965466503, now seen corresponding path program 6 times [2021-05-22 02:23:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:37,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450973965] [2021-05-22 02:23:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:37,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450973965] [2021-05-22 02:23:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450973965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:37,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031118991] [2021-05-22 02:23:37,372 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 [2021-05-22 02:23:37,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:37,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031118991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:37,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:37,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:23:37,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80013627] [2021-05-22 02:23:37,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:23:37,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:37,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:23:37,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:37,492 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) [2021-05-22 02:23:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:37,653 INFO L93 Difference]: Finished difference Result 408 states and 1169 transitions. [2021-05-22 02:23:37,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:37,654 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 [2021-05-22 02:23:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:37,654 INFO L225 Difference]: With dead ends: 408 [2021-05-22 02:23:37,654 INFO L226 Difference]: Without dead ends: 389 [2021-05-22 02:23:37,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-22 02:23:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 202. [2021-05-22 02:23:37,658 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) [2021-05-22 02:23:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 604 transitions. [2021-05-22 02:23:37,659 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 604 transitions. Word has length 18 [2021-05-22 02:23:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:37,659 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 604 transitions. [2021-05-22 02:23:37,659 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) [2021-05-22 02:23:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 604 transitions. [2021-05-22 02:23:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:37,659 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:37,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:37,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:37,860 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash -725187835, now seen corresponding path program 1 times [2021-05-22 02:23:37,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:37,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504937058] [2021-05-22 02:23:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:37,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504937058] [2021-05-22 02:23:37,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504937058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:37,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:37,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:23:37,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775903576] [2021-05-22 02:23:37,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:37,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:37,915 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) [2021-05-22 02:23:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:38,004 INFO L93 Difference]: Finished difference Result 424 states and 1195 transitions. [2021-05-22 02:23:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:38,004 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 [2021-05-22 02:23:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:38,005 INFO L225 Difference]: With dead ends: 424 [2021-05-22 02:23:38,005 INFO L226 Difference]: Without dead ends: 366 [2021-05-22 02:23:38,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-22 02:23:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 252. [2021-05-22 02:23:38,009 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) [2021-05-22 02:23:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 736 transitions. [2021-05-22 02:23:38,010 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 736 transitions. Word has length 18 [2021-05-22 02:23:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:38,010 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 736 transitions. [2021-05-22 02:23:38,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 736 transitions. [2021-05-22 02:23:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:38,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:38,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:38,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-22 02:23:38,011 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash -809235458, now seen corresponding path program 1 times [2021-05-22 02:23:38,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:38,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711157241] [2021-05-22 02:23:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:38,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711157241] [2021-05-22 02:23:38,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711157241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:38,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:38,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:23:38,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74088181] [2021-05-22 02:23:38,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:38,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:38,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:38,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:38,071 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) [2021-05-22 02:23:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:38,150 INFO L93 Difference]: Finished difference Result 445 states and 1245 transitions. [2021-05-22 02:23:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:38,150 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 [2021-05-22 02:23:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:38,151 INFO L225 Difference]: With dead ends: 445 [2021-05-22 02:23:38,151 INFO L226 Difference]: Without dead ends: 358 [2021-05-22 02:23:38,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-22 02:23:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 269. [2021-05-22 02:23:38,156 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) [2021-05-22 02:23:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 783 transitions. [2021-05-22 02:23:38,156 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 783 transitions. Word has length 18 [2021-05-22 02:23:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:38,156 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 783 transitions. [2021-05-22 02:23:38,156 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) [2021-05-22 02:23:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 783 transitions. [2021-05-22 02:23:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:38,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:38,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:38,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-22 02:23:38,157 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash -966424801, now seen corresponding path program 7 times [2021-05-22 02:23:38,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:38,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719022323] [2021-05-22 02:23:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:38,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719022323] [2021-05-22 02:23:38,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719022323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228778423] [2021-05-22 02:23:38,202 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 [2021-05-22 02:23:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228778423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:38,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497451269] [2021-05-22 02:23:38,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:38,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:38,340 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) [2021-05-22 02:23:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:38,500 INFO L93 Difference]: Finished difference Result 563 states and 1578 transitions. [2021-05-22 02:23:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:38,501 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 [2021-05-22 02:23:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:38,501 INFO L225 Difference]: With dead ends: 563 [2021-05-22 02:23:38,501 INFO L226 Difference]: Without dead ends: 544 [2021-05-22 02:23:38,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-22 02:23:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 278. [2021-05-22 02:23:38,506 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) [2021-05-22 02:23:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 821 transitions. [2021-05-22 02:23:38,507 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 821 transitions. Word has length 18 [2021-05-22 02:23:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:38,507 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 821 transitions. [2021-05-22 02:23:38,507 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) [2021-05-22 02:23:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 821 transitions. [2021-05-22 02:23:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:38,508 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:38,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:38,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-22 02:23:38,721 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash 241128271, now seen corresponding path program 8 times [2021-05-22 02:23:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:38,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603102287] [2021-05-22 02:23:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603102287] [2021-05-22 02:23:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603102287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897905806] [2021-05-22 02:23:38,770 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 [2021-05-22 02:23:38,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:38,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897905806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:38,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:23:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638277197] [2021-05-22 02:23:38,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:23:38,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:23:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:38,877 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) [2021-05-22 02:23:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:39,034 INFO L93 Difference]: Finished difference Result 539 states and 1539 transitions. [2021-05-22 02:23:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:39,035 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 [2021-05-22 02:23:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:39,036 INFO L225 Difference]: With dead ends: 539 [2021-05-22 02:23:39,036 INFO L226 Difference]: Without dead ends: 520 [2021-05-22 02:23:39,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-22 02:23:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 282. [2021-05-22 02:23:39,041 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) [2021-05-22 02:23:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 841 transitions. [2021-05-22 02:23:39,041 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 841 transitions. Word has length 18 [2021-05-22 02:23:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:39,042 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 841 transitions. [2021-05-22 02:23:39,042 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) [2021-05-22 02:23:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 841 transitions. [2021-05-22 02:23:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:39,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:39,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:39,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-22 02:23:39,266 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1457592117, now seen corresponding path program 9 times [2021-05-22 02:23:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:39,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103377069] [2021-05-22 02:23:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:39,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103377069] [2021-05-22 02:23:39,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103377069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156130402] [2021-05-22 02:23:39,317 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 [2021-05-22 02:23:39,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:39,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:39,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:39,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156130402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:39,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:39,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020330156] [2021-05-22 02:23:39,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:39,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:39,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:39,447 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) [2021-05-22 02:23:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:39,568 INFO L93 Difference]: Finished difference Result 549 states and 1564 transitions. [2021-05-22 02:23:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:39,568 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 [2021-05-22 02:23:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:39,570 INFO L225 Difference]: With dead ends: 549 [2021-05-22 02:23:39,570 INFO L226 Difference]: Without dead ends: 530 [2021-05-22 02:23:39,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-22 02:23:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 271. [2021-05-22 02:23:39,575 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) [2021-05-22 02:23:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 793 transitions. [2021-05-22 02:23:39,576 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 793 transitions. Word has length 18 [2021-05-22 02:23:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:39,576 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 793 transitions. [2021-05-22 02:23:39,576 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) [2021-05-22 02:23:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 793 transitions. [2021-05-22 02:23:39,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:39,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:39,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:39,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:39,799 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:39,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1254344866, now seen corresponding path program 2 times [2021-05-22 02:23:39,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:39,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772732376] [2021-05-22 02:23:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:39,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772732376] [2021-05-22 02:23:39,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772732376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:39,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:39,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:23:39,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144007778] [2021-05-22 02:23:39,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:39,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:39,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:39,845 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) [2021-05-22 02:23:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:39,907 INFO L93 Difference]: Finished difference Result 528 states and 1474 transitions. [2021-05-22 02:23:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:39,908 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 [2021-05-22 02:23:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:39,909 INFO L225 Difference]: With dead ends: 528 [2021-05-22 02:23:39,909 INFO L226 Difference]: Without dead ends: 457 [2021-05-22 02:23:39,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-22 02:23:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-05-22 02:23:39,914 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) [2021-05-22 02:23:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 850 transitions. [2021-05-22 02:23:39,915 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 850 transitions. Word has length 18 [2021-05-22 02:23:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:39,915 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 850 transitions. [2021-05-22 02:23:39,915 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) [2021-05-22 02:23:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 850 transitions. [2021-05-22 02:23:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:39,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:39,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:39,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-22 02:23:39,916 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:39,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1663824377, now seen corresponding path program 10 times [2021-05-22 02:23:39,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:39,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880627630] [2021-05-22 02:23:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:39,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880627630] [2021-05-22 02:23:39,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880627630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483994886] [2021-05-22 02:23:39,982 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 [2021-05-22 02:23:40,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:40,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:40,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:40,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483994886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:40,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:40,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489108350] [2021-05-22 02:23:40,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:40,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:40,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:40,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:40,105 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) [2021-05-22 02:23:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:40,325 INFO L93 Difference]: Finished difference Result 473 states and 1329 transitions. [2021-05-22 02:23:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:40,325 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 [2021-05-22 02:23:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:40,326 INFO L225 Difference]: With dead ends: 473 [2021-05-22 02:23:40,326 INFO L226 Difference]: Without dead ends: 454 [2021-05-22 02:23:40,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:23:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-22 02:23:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 291. [2021-05-22 02:23:40,330 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) [2021-05-22 02:23:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-05-22 02:23:40,331 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 18 [2021-05-22 02:23:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:40,331 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-05-22 02:23:40,331 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) [2021-05-22 02:23:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-05-22 02:23:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:40,332 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:40,332 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:40,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-22 02:23:40,545 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1866597709, now seen corresponding path program 11 times [2021-05-22 02:23:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:40,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020298144] [2021-05-22 02:23:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020298144] [2021-05-22 02:23:40,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020298144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283339685] [2021-05-22 02:23:40,597 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 [2021-05-22 02:23:40,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:40,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283339685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:40,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:40,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237227495] [2021-05-22 02:23:40,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:40,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:40,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:40,736 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) [2021-05-22 02:23:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:40,960 INFO L93 Difference]: Finished difference Result 431 states and 1219 transitions. [2021-05-22 02:23:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:40,961 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 [2021-05-22 02:23:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:40,962 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:23:40,962 INFO L226 Difference]: Without dead ends: 408 [2021-05-22 02:23:40,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-22 02:23:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 299. [2021-05-22 02:23:40,967 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) [2021-05-22 02:23:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 884 transitions. [2021-05-22 02:23:40,967 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 884 transitions. Word has length 18 [2021-05-22 02:23:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:40,968 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 884 transitions. [2021-05-22 02:23:40,968 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) [2021-05-22 02:23:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 884 transitions. [2021-05-22 02:23:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:40,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:40,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:41,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-22 02:23:41,190 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash -752125083, now seen corresponding path program 2 times [2021-05-22 02:23:41,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:41,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300359272] [2021-05-22 02:23:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:41,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300359272] [2021-05-22 02:23:41,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300359272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289900465] [2021-05-22 02:23:41,239 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 [2021-05-22 02:23:41,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:41,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:41,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:23:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289900465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:41,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:41,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443951508] [2021-05-22 02:23:41,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:41,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:41,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:41,361 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) [2021-05-22 02:23:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:41,518 INFO L93 Difference]: Finished difference Result 471 states and 1313 transitions. [2021-05-22 02:23:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:41,518 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 [2021-05-22 02:23:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:41,519 INFO L225 Difference]: With dead ends: 471 [2021-05-22 02:23:41,519 INFO L226 Difference]: Without dead ends: 449 [2021-05-22 02:23:41,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-22 02:23:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 301. [2021-05-22 02:23:41,525 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) [2021-05-22 02:23:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 891 transitions. [2021-05-22 02:23:41,525 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 891 transitions. Word has length 18 [2021-05-22 02:23:41,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:41,525 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 891 transitions. [2021-05-22 02:23:41,526 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) [2021-05-22 02:23:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 891 transitions. [2021-05-22 02:23:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:41,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:41,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:41,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:41,749 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:41,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1213009967, now seen corresponding path program 12 times [2021-05-22 02:23:41,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:41,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574380280] [2021-05-22 02:23:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:41,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574380280] [2021-05-22 02:23:41,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574380280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103485821] [2021-05-22 02:23:41,798 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 [2021-05-22 02:23:41,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:41,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:41,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:41,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103485821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:41,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:41,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286152720] [2021-05-22 02:23:41,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:41,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:41,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:41,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:41,925 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) [2021-05-22 02:23:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:42,126 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-05-22 02:23:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:42,127 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 [2021-05-22 02:23:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:42,127 INFO L225 Difference]: With dead ends: 417 [2021-05-22 02:23:42,127 INFO L226 Difference]: Without dead ends: 398 [2021-05-22 02:23:42,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-22 02:23:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 295. [2021-05-22 02:23:42,131 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) [2021-05-22 02:23:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-05-22 02:23:42,131 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-05-22 02:23:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:42,131 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-05-22 02:23:42,131 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) [2021-05-22 02:23:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-05-22 02:23:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:42,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:42,132 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:42,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-22 02:23:42,344 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 303490843, now seen corresponding path program 3 times [2021-05-22 02:23:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:42,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468590680] [2021-05-22 02:23:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468590680] [2021-05-22 02:23:42,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468590680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:42,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:42,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:23:42,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007960674] [2021-05-22 02:23:42,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:23:42,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:42,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:23:42,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:42,390 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) [2021-05-22 02:23:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:42,570 INFO L93 Difference]: Finished difference Result 441 states and 1242 transitions. [2021-05-22 02:23:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:42,570 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 [2021-05-22 02:23:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:42,571 INFO L225 Difference]: With dead ends: 441 [2021-05-22 02:23:42,571 INFO L226 Difference]: Without dead ends: 412 [2021-05-22 02:23:42,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-22 02:23:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 295. [2021-05-22 02:23:42,576 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) [2021-05-22 02:23:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-05-22 02:23:42,576 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-05-22 02:23:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:42,576 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-05-22 02:23:42,576 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) [2021-05-22 02:23:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-05-22 02:23:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:42,577 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:42,577 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:42,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-22 02:23:42,577 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:42,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:42,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1861527460, now seen corresponding path program 3 times [2021-05-22 02:23:42,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:42,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819599138] [2021-05-22 02:23:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819599138] [2021-05-22 02:23:42,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819599138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341571156] [2021-05-22 02:23:42,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:23:42,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:42,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341571156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:42,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-22 02:23:42,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645794949] [2021-05-22 02:23:42,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:23:42,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:42,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:23:42,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:42,712 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) [2021-05-22 02:23:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:42,773 INFO L93 Difference]: Finished difference Result 458 states and 1290 transitions. [2021-05-22 02:23:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:42,773 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 [2021-05-22 02:23:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:42,774 INFO L225 Difference]: With dead ends: 458 [2021-05-22 02:23:42,774 INFO L226 Difference]: Without dead ends: 401 [2021-05-22 02:23:42,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-22 02:23:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 292. [2021-05-22 02:23:42,778 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) [2021-05-22 02:23:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 864 transitions. [2021-05-22 02:23:42,778 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 864 transitions. Word has length 18 [2021-05-22 02:23:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:42,778 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 864 transitions. [2021-05-22 02:23:42,778 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) [2021-05-22 02:23:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 864 transitions. [2021-05-22 02:23:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:42,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:42,779 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:42,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,979 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1997185865, now seen corresponding path program 13 times [2021-05-22 02:23:42,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:42,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597141618] [2021-05-22 02:23:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:43,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597141618] [2021-05-22 02:23:43,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597141618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169359851] [2021-05-22 02:23:43,046 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 [2021-05-22 02:23:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:43,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169359851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:43,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-22 02:23:43,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782160118] [2021-05-22 02:23:43,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:43,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:43,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:43,180 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) [2021-05-22 02:23:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:43,397 INFO L93 Difference]: Finished difference Result 491 states and 1393 transitions. [2021-05-22 02:23:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:43,398 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 [2021-05-22 02:23:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:43,399 INFO L225 Difference]: With dead ends: 491 [2021-05-22 02:23:43,399 INFO L226 Difference]: Without dead ends: 472 [2021-05-22 02:23:43,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-22 02:23:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 298. [2021-05-22 02:23:43,403 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) [2021-05-22 02:23:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 892 transitions. [2021-05-22 02:23:43,416 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 892 transitions. Word has length 18 [2021-05-22 02:23:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:43,416 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 892 transitions. [2021-05-22 02:23:43,416 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) [2021-05-22 02:23:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 892 transitions. [2021-05-22 02:23:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:43,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:43,417 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:43,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:43,633 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1067024689, now seen corresponding path program 14 times [2021-05-22 02:23:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:43,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611189807] [2021-05-22 02:23:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611189807] [2021-05-22 02:23:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611189807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969332509] [2021-05-22 02:23:43,680 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 [2021-05-22 02:23:43,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:43,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:43,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969332509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:43,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:43,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221674443] [2021-05-22 02:23:43,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:43,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:43,819 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) [2021-05-22 02:23:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:44,014 INFO L93 Difference]: Finished difference Result 479 states and 1353 transitions. [2021-05-22 02:23:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:44,015 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 [2021-05-22 02:23:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:44,016 INFO L225 Difference]: With dead ends: 479 [2021-05-22 02:23:44,016 INFO L226 Difference]: Without dead ends: 456 [2021-05-22 02:23:44,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-05-22 02:23:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-05-22 02:23:44,021 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) [2021-05-22 02:23:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 898 transitions. [2021-05-22 02:23:44,021 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 898 transitions. Word has length 18 [2021-05-22 02:23:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:44,021 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 898 transitions. [2021-05-22 02:23:44,022 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) [2021-05-22 02:23:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 898 transitions. [2021-05-22 02:23:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:44,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:44,022 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:44,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-22 02:23:44,223 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash -435848983, now seen corresponding path program 4 times [2021-05-22 02:23:44,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:44,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780397862] [2021-05-22 02:23:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:44,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780397862] [2021-05-22 02:23:44,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780397862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431727271] [2021-05-22 02:23:44,250 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 [2021-05-22 02:23:44,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:44,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431727271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:44,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-22 02:23:44,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025825821] [2021-05-22 02:23:44,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:23:44,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:23:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:44,337 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) [2021-05-22 02:23:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:44,389 INFO L93 Difference]: Finished difference Result 566 states and 1645 transitions. [2021-05-22 02:23:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:44,390 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 [2021-05-22 02:23:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:44,391 INFO L225 Difference]: With dead ends: 566 [2021-05-22 02:23:44,391 INFO L226 Difference]: Without dead ends: 517 [2021-05-22 02:23:44,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-05-22 02:23:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-05-22 02:23:44,396 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) [2021-05-22 02:23:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 943 transitions. [2021-05-22 02:23:44,397 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 943 transitions. Word has length 18 [2021-05-22 02:23:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:44,397 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 943 transitions. [2021-05-22 02:23:44,397 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) [2021-05-22 02:23:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 943 transitions. [2021-05-22 02:23:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:44,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:44,398 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:44,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:44,609 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1726676173, now seen corresponding path program 15 times [2021-05-22 02:23:44,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:44,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047205957] [2021-05-22 02:23:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:44,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047205957] [2021-05-22 02:23:44,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047205957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447600059] [2021-05-22 02:23:44,669 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 [2021-05-22 02:23:44,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:44,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447600059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:44,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:44,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087968135] [2021-05-22 02:23:44,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:44,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:44,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:44,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:44,808 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) [2021-05-22 02:23:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:45,033 INFO L93 Difference]: Finished difference Result 516 states and 1480 transitions. [2021-05-22 02:23:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:45,034 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 [2021-05-22 02:23:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:45,035 INFO L225 Difference]: With dead ends: 516 [2021-05-22 02:23:45,035 INFO L226 Difference]: Without dead ends: 497 [2021-05-22 02:23:45,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:23:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-05-22 02:23:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 308. [2021-05-22 02:23:45,040 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) [2021-05-22 02:23:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 940 transitions. [2021-05-22 02:23:45,040 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 940 transitions. Word has length 18 [2021-05-22 02:23:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:45,041 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 940 transitions. [2021-05-22 02:23:45,041 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) [2021-05-22 02:23:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 940 transitions. [2021-05-22 02:23:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:45,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:45,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:45,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-22 02:23:45,253 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1907804621, now seen corresponding path program 16 times [2021-05-22 02:23:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:45,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658178603] [2021-05-22 02:23:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658178603] [2021-05-22 02:23:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658178603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275134306] [2021-05-22 02:23:45,303 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 [2021-05-22 02:23:45,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:45,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275134306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:45,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:45,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780978922] [2021-05-22 02:23:45,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:45,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:45,431 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) [2021-05-22 02:23:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:45,571 INFO L93 Difference]: Finished difference Result 497 states and 1451 transitions. [2021-05-22 02:23:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:45,572 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 [2021-05-22 02:23:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:45,573 INFO L225 Difference]: With dead ends: 497 [2021-05-22 02:23:45,573 INFO L226 Difference]: Without dead ends: 478 [2021-05-22 02:23:45,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-22 02:23:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2021-05-22 02:23:45,594 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) [2021-05-22 02:23:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-05-22 02:23:45,597 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 18 [2021-05-22 02:23:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:45,597 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-05-22 02:23:45,597 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) [2021-05-22 02:23:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-05-22 02:23:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:45,598 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:45,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:45,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:45,817 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash 398774047, now seen corresponding path program 5 times [2021-05-22 02:23:45,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:45,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678719588] [2021-05-22 02:23:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:45,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678719588] [2021-05-22 02:23:45,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678719588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:45,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:45,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:23:45,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536946570] [2021-05-22 02:23:45,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:45,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:45,866 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) [2021-05-22 02:23:45,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:45,936 INFO L93 Difference]: Finished difference Result 514 states and 1465 transitions. [2021-05-22 02:23:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:45,936 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 [2021-05-22 02:23:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:45,937 INFO L225 Difference]: With dead ends: 514 [2021-05-22 02:23:45,937 INFO L226 Difference]: Without dead ends: 452 [2021-05-22 02:23:45,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-22 02:23:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 296. [2021-05-22 02:23:45,942 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) [2021-05-22 02:23:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-05-22 02:23:45,943 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-05-22 02:23:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:45,943 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-05-22 02:23:45,943 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) [2021-05-22 02:23:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-05-22 02:23:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:45,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:45,944 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:45,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-22 02:23:45,944 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash 505869899, now seen corresponding path program 17 times [2021-05-22 02:23:45,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:45,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411372067] [2021-05-22 02:23:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:45,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411372067] [2021-05-22 02:23:45,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411372067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394816276] [2021-05-22 02:23:45,988 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 [2021-05-22 02:23:46,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:46,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:46,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:46,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394816276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:46,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:46,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:46,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126550375] [2021-05-22 02:23:46,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:46,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:46,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:46,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:46,125 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) [2021-05-22 02:23:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:46,344 INFO L93 Difference]: Finished difference Result 450 states and 1288 transitions. [2021-05-22 02:23:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:46,344 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 [2021-05-22 02:23:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:46,345 INFO L225 Difference]: With dead ends: 450 [2021-05-22 02:23:46,345 INFO L226 Difference]: Without dead ends: 427 [2021-05-22 02:23:46,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-22 02:23:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 304. [2021-05-22 02:23:46,349 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) [2021-05-22 02:23:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-05-22 02:23:46,350 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 18 [2021-05-22 02:23:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:46,350 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-05-22 02:23:46,350 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) [2021-05-22 02:23:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-05-22 02:23:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:46,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:46,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:46,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:46,561 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:46,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1484427343, now seen corresponding path program 18 times [2021-05-22 02:23:46,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:46,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694164433] [2021-05-22 02:23:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:46,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694164433] [2021-05-22 02:23:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694164433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301691186] [2021-05-22 02:23:46,616 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 [2021-05-22 02:23:46,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:46,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:46,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301691186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:46,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:46,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:46,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751516069] [2021-05-22 02:23:46,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:46,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:46,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:46,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:46,746 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) [2021-05-22 02:23:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:46,957 INFO L93 Difference]: Finished difference Result 434 states and 1258 transitions. [2021-05-22 02:23:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:46,957 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 [2021-05-22 02:23:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:46,958 INFO L225 Difference]: With dead ends: 434 [2021-05-22 02:23:46,958 INFO L226 Difference]: Without dead ends: 415 [2021-05-22 02:23:46,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-22 02:23:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 296. [2021-05-22 02:23:46,962 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) [2021-05-22 02:23:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-05-22 02:23:46,963 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-05-22 02:23:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:46,963 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-05-22 02:23:46,963 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) [2021-05-22 02:23:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-05-22 02:23:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:46,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:46,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:47,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-22 02:23:47,185 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1410127391, now seen corresponding path program 19 times [2021-05-22 02:23:47,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:47,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887523824] [2021-05-22 02:23:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:47,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887523824] [2021-05-22 02:23:47,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887523824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855338082] [2021-05-22 02:23:47,236 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 [2021-05-22 02:23:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:47,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855338082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:47,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30375129] [2021-05-22 02:23:47,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:47,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:47,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:47,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:47,369 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) [2021-05-22 02:23:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:47,557 INFO L93 Difference]: Finished difference Result 468 states and 1339 transitions. [2021-05-22 02:23:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:47,558 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 [2021-05-22 02:23:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:47,558 INFO L225 Difference]: With dead ends: 468 [2021-05-22 02:23:47,558 INFO L226 Difference]: Without dead ends: 449 [2021-05-22 02:23:47,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:23:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-22 02:23:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 302. [2021-05-22 02:23:47,562 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) [2021-05-22 02:23:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 910 transitions. [2021-05-22 02:23:47,562 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 910 transitions. Word has length 18 [2021-05-22 02:23:47,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:47,562 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 910 transitions. [2021-05-22 02:23:47,562 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) [2021-05-22 02:23:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 910 transitions. [2021-05-22 02:23:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:47,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:47,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:47,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:47,764 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1565959223, now seen corresponding path program 20 times [2021-05-22 02:23:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:47,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769678670] [2021-05-22 02:23:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:47,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769678670] [2021-05-22 02:23:47,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769678670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147875418] [2021-05-22 02:23:47,829 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 [2021-05-22 02:23:47,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147875418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:47,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:47,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600003472] [2021-05-22 02:23:47,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:47,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:47,943 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) [2021-05-22 02:23:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:48,146 INFO L93 Difference]: Finished difference Result 479 states and 1352 transitions. [2021-05-22 02:23:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:48,146 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 [2021-05-22 02:23:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:48,147 INFO L225 Difference]: With dead ends: 479 [2021-05-22 02:23:48,147 INFO L226 Difference]: Without dead ends: 460 [2021-05-22 02:23:48,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:23:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-22 02:23:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 306. [2021-05-22 02:23:48,150 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) [2021-05-22 02:23:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-05-22 02:23:48,151 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-05-22 02:23:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:48,151 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-05-22 02:23:48,151 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) [2021-05-22 02:23:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-05-22 02:23:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:48,151 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:48,151 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:48,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:48,352 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash -635798047, now seen corresponding path program 21 times [2021-05-22 02:23:48,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:48,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304043441] [2021-05-22 02:23:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304043441] [2021-05-22 02:23:48,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304043441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135003310] [2021-05-22 02:23:48,404 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 [2021-05-22 02:23:48,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:48,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135003310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:48,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:48,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382297654] [2021-05-22 02:23:48,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:48,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:48,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:48,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:48,538 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) [2021-05-22 02:23:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:48,753 INFO L93 Difference]: Finished difference Result 442 states and 1266 transitions. [2021-05-22 02:23:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:48,753 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 [2021-05-22 02:23:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:48,754 INFO L225 Difference]: With dead ends: 442 [2021-05-22 02:23:48,754 INFO L226 Difference]: Without dead ends: 419 [2021-05-22 02:23:48,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-22 02:23:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 308. [2021-05-22 02:23:48,757 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) [2021-05-22 02:23:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-05-22 02:23:48,757 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 18 [2021-05-22 02:23:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:48,757 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-05-22 02:23:48,757 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) [2021-05-22 02:23:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-05-22 02:23:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:48,758 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:48,758 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:48,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:48,958 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:48,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1614261531, now seen corresponding path program 22 times [2021-05-22 02:23:48,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:48,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157483994] [2021-05-22 02:23:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:49,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:49,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157483994] [2021-05-22 02:23:49,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157483994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:49,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442975120] [2021-05-22 02:23:49,010 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 [2021-05-22 02:23:49,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:49,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:49,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442975120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:49,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:49,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:49,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211671499] [2021-05-22 02:23:49,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:49,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:49,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:49,127 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) [2021-05-22 02:23:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:49,296 INFO L93 Difference]: Finished difference Result 535 states and 1530 transitions. [2021-05-22 02:23:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:49,296 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 [2021-05-22 02:23:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:49,297 INFO L225 Difference]: With dead ends: 535 [2021-05-22 02:23:49,297 INFO L226 Difference]: Without dead ends: 516 [2021-05-22 02:23:49,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:23:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-22 02:23:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2021-05-22 02:23:49,302 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) [2021-05-22 02:23:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 914 transitions. [2021-05-22 02:23:49,303 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 914 transitions. Word has length 18 [2021-05-22 02:23:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:49,303 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 914 transitions. [2021-05-22 02:23:49,303 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) [2021-05-22 02:23:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 914 transitions. [2021-05-22 02:23:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:49,304 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:49,304 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:49,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-05-22 02:23:49,504 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1839327131, now seen corresponding path program 23 times [2021-05-22 02:23:49,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:49,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550166133] [2021-05-22 02:23:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:49,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550166133] [2021-05-22 02:23:49,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550166133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036950212] [2021-05-22 02:23:49,553 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 [2021-05-22 02:23:49,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:49,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:49,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036950212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:49,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:49,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:49,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336338152] [2021-05-22 02:23:49,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:49,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:49,681 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) [2021-05-22 02:23:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:49,832 INFO L93 Difference]: Finished difference Result 537 states and 1559 transitions. [2021-05-22 02:23:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:49,832 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 [2021-05-22 02:23:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:49,833 INFO L225 Difference]: With dead ends: 537 [2021-05-22 02:23:49,833 INFO L226 Difference]: Without dead ends: 518 [2021-05-22 02:23:49,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-22 02:23:49,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 307. [2021-05-22 02:23:49,837 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) [2021-05-22 02:23:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 934 transitions. [2021-05-22 02:23:49,837 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 934 transitions. Word has length 18 [2021-05-22 02:23:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:49,837 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 934 transitions. [2021-05-22 02:23:49,837 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) [2021-05-22 02:23:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 934 transitions. [2021-05-22 02:23:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:49,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:49,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:50,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:50,038 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 756919777, now seen corresponding path program 24 times [2021-05-22 02:23:50,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:50,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354183724] [2021-05-22 02:23:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:50,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:50,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354183724] [2021-05-22 02:23:50,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354183724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:50,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051974503] [2021-05-22 02:23:50,081 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 [2021-05-22 02:23:50,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:50,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:50,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051974503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:50,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:50,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:23:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225509297] [2021-05-22 02:23:50,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:23:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:23:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:50,303 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) [2021-05-22 02:23:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:50,418 INFO L93 Difference]: Finished difference Result 500 states and 1473 transitions. [2021-05-22 02:23:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:50,418 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 [2021-05-22 02:23:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:50,419 INFO L225 Difference]: With dead ends: 500 [2021-05-22 02:23:50,419 INFO L226 Difference]: Without dead ends: 481 [2021-05-22 02:23:50,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-05-22 02:23:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 299. [2021-05-22 02:23:50,423 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) [2021-05-22 02:23:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-22 02:23:50,424 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-22 02:23:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:50,424 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-22 02:23:50,424 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) [2021-05-22 02:23:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-22 02:23:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:50,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:50,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-22 02:23:50,625 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1237003341, now seen corresponding path program 25 times [2021-05-22 02:23:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:50,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335512497] [2021-05-22 02:23:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:50,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:50,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335512497] [2021-05-22 02:23:50,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335512497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:50,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622510127] [2021-05-22 02:23:50,678 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 [2021-05-22 02:23:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:50,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:50,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622510127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:50,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:50,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:50,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376426991] [2021-05-22 02:23:50,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:50,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:50,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:50,791 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) [2021-05-22 02:23:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:50,961 INFO L93 Difference]: Finished difference Result 506 states and 1446 transitions. [2021-05-22 02:23:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:50,961 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 [2021-05-22 02:23:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:50,961 INFO L225 Difference]: With dead ends: 506 [2021-05-22 02:23:50,962 INFO L226 Difference]: Without dead ends: 487 [2021-05-22 02:23:50,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-05-22 02:23:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-05-22 02:23:50,966 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) [2021-05-22 02:23:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 925 transitions. [2021-05-22 02:23:50,966 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 925 transitions. Word has length 18 [2021-05-22 02:23:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:50,967 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 925 transitions. [2021-05-22 02:23:50,967 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) [2021-05-22 02:23:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 925 transitions. [2021-05-22 02:23:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:50,967 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:50,967 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:51,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-22 02:23:51,189 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:51,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2127802779, now seen corresponding path program 26 times [2021-05-22 02:23:51,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:51,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252923053] [2021-05-22 02:23:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:51,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:51,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252923053] [2021-05-22 02:23:51,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252923053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:51,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461488685] [2021-05-22 02:23:51,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:23:51,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:51,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:51,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:51,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461488685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:51,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:51,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:51,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530947914] [2021-05-22 02:23:51,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:51,362 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) [2021-05-22 02:23:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:51,517 INFO L93 Difference]: Finished difference Result 494 states and 1406 transitions. [2021-05-22 02:23:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:51,517 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 [2021-05-22 02:23:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:51,518 INFO L225 Difference]: With dead ends: 494 [2021-05-22 02:23:51,518 INFO L226 Difference]: Without dead ends: 471 [2021-05-22 02:23:51,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-22 02:23:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 307. [2021-05-22 02:23:51,521 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) [2021-05-22 02:23:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-05-22 02:23:51,522 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 18 [2021-05-22 02:23:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:51,522 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-05-22 02:23:51,522 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) [2021-05-22 02:23:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-05-22 02:23:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:51,522 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:51,522 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:51,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-22 02:23:51,723 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1507513033, now seen corresponding path program 27 times [2021-05-22 02:23:51,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:51,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651994625] [2021-05-22 02:23:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:51,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:51,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651994625] [2021-05-22 02:23:51,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651994625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:51,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150484883] [2021-05-22 02:23:51,780 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 [2021-05-22 02:23:51,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:51,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:51,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:51,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150484883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:51,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:51,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:51,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900569588] [2021-05-22 02:23:51,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:51,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:51,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:51,918 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) [2021-05-22 02:23:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:52,104 INFO L93 Difference]: Finished difference Result 509 states and 1449 transitions. [2021-05-22 02:23:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:52,105 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 [2021-05-22 02:23:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:52,105 INFO L225 Difference]: With dead ends: 509 [2021-05-22 02:23:52,105 INFO L226 Difference]: Without dead ends: 490 [2021-05-22 02:23:52,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:23:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-22 02:23:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-05-22 02:23:52,109 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) [2021-05-22 02:23:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 923 transitions. [2021-05-22 02:23:52,109 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 923 transitions. Word has length 18 [2021-05-22 02:23:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:52,110 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 923 transitions. [2021-05-22 02:23:52,110 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) [2021-05-22 02:23:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 923 transitions. [2021-05-22 02:23:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:52,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:52,110 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:52,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:52,311 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:52,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1326384585, now seen corresponding path program 28 times [2021-05-22 02:23:52,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:52,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691532826] [2021-05-22 02:23:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:52,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691532826] [2021-05-22 02:23:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691532826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302271687] [2021-05-22 02:23:52,354 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 [2021-05-22 02:23:52,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:52,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302271687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:52,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:52,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:52,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942824883] [2021-05-22 02:23:52,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:52,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:52,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:52,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:52,462 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) [2021-05-22 02:23:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:52,604 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-05-22 02:23:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:52,605 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 [2021-05-22 02:23:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:52,605 INFO L225 Difference]: With dead ends: 490 [2021-05-22 02:23:52,605 INFO L226 Difference]: Without dead ends: 471 [2021-05-22 02:23:52,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-22 02:23:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 300. [2021-05-22 02:23:52,610 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) [2021-05-22 02:23:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 903 transitions. [2021-05-22 02:23:52,611 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 903 transitions. Word has length 18 [2021-05-22 02:23:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:52,611 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 903 transitions. [2021-05-22 02:23:52,611 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) [2021-05-22 02:23:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 903 transitions. [2021-05-22 02:23:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:52,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:52,611 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:52,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-22 02:23:52,836 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash -554908191, now seen corresponding path program 29 times [2021-05-22 02:23:52,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:52,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761883072] [2021-05-22 02:23:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:52,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761883072] [2021-05-22 02:23:52,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761883072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104509952] [2021-05-22 02:23:52,883 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 [2021-05-22 02:23:52,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:52,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:52,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104509952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:52,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:52,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:52,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559821915] [2021-05-22 02:23:52,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:52,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:52,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:52,992 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) [2021-05-22 02:23:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:53,195 INFO L93 Difference]: Finished difference Result 447 states and 1285 transitions. [2021-05-22 02:23:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:53,195 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 [2021-05-22 02:23:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:53,195 INFO L225 Difference]: With dead ends: 447 [2021-05-22 02:23:53,195 INFO L226 Difference]: Without dead ends: 424 [2021-05-22 02:23:53,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-22 02:23:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 308. [2021-05-22 02:23:53,199 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) [2021-05-22 02:23:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 925 transitions. [2021-05-22 02:23:53,199 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 925 transitions. Word has length 18 [2021-05-22 02:23:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:53,199 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 925 transitions. [2021-05-22 02:23:53,199 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) [2021-05-22 02:23:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 925 transitions. [2021-05-22 02:23:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:53,200 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:53,200 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:53,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-22 02:23:53,400 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash 423649253, now seen corresponding path program 30 times [2021-05-22 02:23:53,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:53,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074315249] [2021-05-22 02:23:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:53,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074315249] [2021-05-22 02:23:53,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074315249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228363523] [2021-05-22 02:23:53,449 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 [2021-05-22 02:23:53,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:53,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:53,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228363523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:53,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:53,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:53,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781773087] [2021-05-22 02:23:53,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:53,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:53,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:53,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:53,577 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) [2021-05-22 02:23:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:53,763 INFO L93 Difference]: Finished difference Result 431 states and 1255 transitions. [2021-05-22 02:23:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:53,763 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 [2021-05-22 02:23:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:53,764 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:23:53,764 INFO L226 Difference]: Without dead ends: 412 [2021-05-22 02:23:53,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-22 02:23:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 299. [2021-05-22 02:23:53,767 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) [2021-05-22 02:23:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-22 02:23:53,767 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-22 02:23:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:53,767 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-22 02:23:53,767 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) [2021-05-22 02:23:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-22 02:23:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:53,768 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:53,768 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:53,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-22 02:23:53,969 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash 427729059, now seen corresponding path program 31 times [2021-05-22 02:23:53,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:53,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937543558] [2021-05-22 02:23:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:54,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:54,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937543558] [2021-05-22 02:23:54,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937543558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:54,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048891239] [2021-05-22 02:23:54,010 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 [2021-05-22 02:23:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:54,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:54,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048891239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:54,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:54,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:54,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647073617] [2021-05-22 02:23:54,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:54,145 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) [2021-05-22 02:23:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:54,267 INFO L93 Difference]: Finished difference Result 569 states and 1629 transitions. [2021-05-22 02:23:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:54,268 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 [2021-05-22 02:23:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:54,268 INFO L225 Difference]: With dead ends: 569 [2021-05-22 02:23:54,268 INFO L226 Difference]: Without dead ends: 550 [2021-05-22 02:23:54,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-22 02:23:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 306. [2021-05-22 02:23:54,272 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) [2021-05-22 02:23:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-05-22 02:23:54,273 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-05-22 02:23:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:54,273 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-05-22 02:23:54,273 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) [2021-05-22 02:23:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-05-22 02:23:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:54,273 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:54,273 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:54,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-22 02:23:54,474 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1635282131, now seen corresponding path program 32 times [2021-05-22 02:23:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:54,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136524753] [2021-05-22 02:23:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:54,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136524753] [2021-05-22 02:23:54,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136524753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443176495] [2021-05-22 02:23:54,516 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 [2021-05-22 02:23:54,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:54,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443176495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:54,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:54,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:23:54,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152269648] [2021-05-22 02:23:54,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:23:54,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:54,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:23:54,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:54,607 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) [2021-05-22 02:23:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:54,746 INFO L93 Difference]: Finished difference Result 581 states and 1668 transitions. [2021-05-22 02:23:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:54,746 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 [2021-05-22 02:23:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:54,747 INFO L225 Difference]: With dead ends: 581 [2021-05-22 02:23:54,747 INFO L226 Difference]: Without dead ends: 562 [2021-05-22 02:23:54,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-05-22 02:23:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 310. [2021-05-22 02:23:54,753 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) [2021-05-22 02:23:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 946 transitions. [2021-05-22 02:23:54,753 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 946 transitions. Word has length 18 [2021-05-22 02:23:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:54,754 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 946 transitions. [2021-05-22 02:23:54,754 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) [2021-05-22 02:23:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 946 transitions. [2021-05-22 02:23:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:54,754 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:54,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:54,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:54,977 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:54,977 INFO L82 PathProgramCache]: Analyzing trace with hash -63438257, now seen corresponding path program 33 times [2021-05-22 02:23:54,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:54,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649014787] [2021-05-22 02:23:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649014787] [2021-05-22 02:23:55,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649014787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713066007] [2021-05-22 02:23:55,026 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 [2021-05-22 02:23:55,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:55,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713066007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:55,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:55,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:55,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435068349] [2021-05-22 02:23:55,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:55,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:55,145 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) [2021-05-22 02:23:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:55,326 INFO L93 Difference]: Finished difference Result 590 states and 1691 transitions. [2021-05-22 02:23:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:55,328 INFO L225 Difference]: With dead ends: 590 [2021-05-22 02:23:55,328 INFO L226 Difference]: Without dead ends: 571 [2021-05-22 02:23:55,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-22 02:23:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 299. [2021-05-22 02:23:55,346 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) [2021-05-22 02:23:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-22 02:23:55,347 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-22 02:23:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:55,347 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-22 02:23:55,347 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) [2021-05-22 02:23:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-22 02:23:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:55,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:55,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:55,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:55,561 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1646468570, now seen corresponding path program 4 times [2021-05-22 02:23:55,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:55,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256815937] [2021-05-22 02:23:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256815937] [2021-05-22 02:23:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256815937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:55,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:55,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:23:55,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554785129] [2021-05-22 02:23:55,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:55,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:55,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:55,599 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) [2021-05-22 02:23:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:55,661 INFO L93 Difference]: Finished difference Result 429 states and 1249 transitions. [2021-05-22 02:23:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:55,661 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 [2021-05-22 02:23:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:55,662 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:23:55,662 INFO L226 Difference]: Without dead ends: 358 [2021-05-22 02:23:55,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-22 02:23:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 294. [2021-05-22 02:23:55,665 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) [2021-05-22 02:23:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-05-22 02:23:55,665 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-05-22 02:23:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:55,665 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-05-22 02:23:55,665 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) [2021-05-22 02:23:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-05-22 02:23:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:55,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:55,666 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:55,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-05-22 02:23:55,666 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash -269670517, now seen corresponding path program 34 times [2021-05-22 02:23:55,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:55,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984997735] [2021-05-22 02:23:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:55,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984997735] [2021-05-22 02:23:55,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984997735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:55,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841168136] [2021-05-22 02:23:55,723 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 [2021-05-22 02:23:55,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:55,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841168136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:55,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:55,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:23:55,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485053638] [2021-05-22 02:23:55,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:23:55,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:23:55,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:55,853 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) [2021-05-22 02:23:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:56,067 INFO L93 Difference]: Finished difference Result 648 states and 1820 transitions. [2021-05-22 02:23:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:56,067 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 [2021-05-22 02:23:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:56,068 INFO L225 Difference]: With dead ends: 648 [2021-05-22 02:23:56,068 INFO L226 Difference]: Without dead ends: 629 [2021-05-22 02:23:56,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:23:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-22 02:23:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 298. [2021-05-22 02:23:56,072 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) [2021-05-22 02:23:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 889 transitions. [2021-05-22 02:23:56,077 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 889 transitions. Word has length 18 [2021-05-22 02:23:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:56,077 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 889 transitions. [2021-05-22 02:23:56,077 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) [2021-05-22 02:23:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 889 transitions. [2021-05-22 02:23:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:56,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:56,078 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:56,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-22 02:23:56,292 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash -472443849, now seen corresponding path program 35 times [2021-05-22 02:23:56,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:56,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620934305] [2021-05-22 02:23:56,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:56,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:56,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620934305] [2021-05-22 02:23:56,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620934305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:56,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883630959] [2021-05-22 02:23:56,338 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 [2021-05-22 02:23:56,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:56,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:56,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:56,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883630959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:56,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:56,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:56,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184125351] [2021-05-22 02:23:56,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:56,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:56,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:56,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:56,448 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) [2021-05-22 02:23:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:56,645 INFO L93 Difference]: Finished difference Result 606 states and 1708 transitions. [2021-05-22 02:23:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:56,645 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 [2021-05-22 02:23:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:56,646 INFO L225 Difference]: With dead ends: 606 [2021-05-22 02:23:56,646 INFO L226 Difference]: Without dead ends: 583 [2021-05-22 02:23:56,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-22 02:23:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 306. [2021-05-22 02:23:56,651 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) [2021-05-22 02:23:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 911 transitions. [2021-05-22 02:23:56,651 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 911 transitions. Word has length 18 [2021-05-22 02:23:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:56,651 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 911 transitions. [2021-05-22 02:23:56,651 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) [2021-05-22 02:23:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 911 transitions. [2021-05-22 02:23:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:56,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:56,652 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:56,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-22 02:23:56,852 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:56,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1687803469, now seen corresponding path program 36 times [2021-05-22 02:23:56,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:56,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102798485] [2021-05-22 02:23:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:56,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:56,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102798485] [2021-05-22 02:23:56,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102798485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:56,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550457819] [2021-05-22 02:23:56,899 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 [2021-05-22 02:23:56,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550457819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:57,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:57,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:57,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691572914] [2021-05-22 02:23:57,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:57,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:57,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:57,009 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) [2021-05-22 02:23:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:57,199 INFO L93 Difference]: Finished difference Result 590 states and 1678 transitions. [2021-05-22 02:23:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:57,199 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 [2021-05-22 02:23:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:57,200 INFO L225 Difference]: With dead ends: 590 [2021-05-22 02:23:57,200 INFO L226 Difference]: Without dead ends: 571 [2021-05-22 02:23:57,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:23:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-22 02:23:57,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 294. [2021-05-22 02:23:57,203 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) [2021-05-22 02:23:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-05-22 02:23:57,204 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-05-22 02:23:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:57,204 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-05-22 02:23:57,204 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) [2021-05-22 02:23:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-05-22 02:23:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:57,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:57,204 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:57,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-22 02:23:57,405 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1039285976, now seen corresponding path program 5 times [2021-05-22 02:23:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:57,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762573184] [2021-05-22 02:23:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:57,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762573184] [2021-05-22 02:23:57,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762573184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:57,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044017856] [2021-05-22 02:23:57,433 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 [2021-05-22 02:23:57,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:23:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044017856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:57,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:57,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-22 02:23:57,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767898220] [2021-05-22 02:23:57,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:23:57,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:23:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:23:57,515 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) [2021-05-22 02:23:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:57,577 INFO L93 Difference]: Finished difference Result 448 states and 1287 transitions. [2021-05-22 02:23:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:57,578 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 [2021-05-22 02:23:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:57,578 INFO L225 Difference]: With dead ends: 448 [2021-05-22 02:23:57,579 INFO L226 Difference]: Without dead ends: 391 [2021-05-22 02:23:57,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-22 02:23:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 287. [2021-05-22 02:23:57,583 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) [2021-05-22 02:23:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 846 transitions. [2021-05-22 02:23:57,584 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 846 transitions. Word has length 18 [2021-05-22 02:23:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:57,584 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 846 transitions. [2021-05-22 02:23:57,584 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) [2021-05-22 02:23:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 846 transitions. [2021-05-22 02:23:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:57,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:57,584 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:57,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-22 02:23:57,801 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash -603032005, now seen corresponding path program 37 times [2021-05-22 02:23:57,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:57,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677793458] [2021-05-22 02:23:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:57,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677793458] [2021-05-22 02:23:57,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677793458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:57,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453905980] [2021-05-22 02:23:57,860 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 [2021-05-22 02:23:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453905980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:57,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:57,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-22 02:23:57,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170963973] [2021-05-22 02:23:57,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:57,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:57,964 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) [2021-05-22 02:23:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:58,107 INFO L93 Difference]: Finished difference Result 610 states and 1732 transitions. [2021-05-22 02:23:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:58,108 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 [2021-05-22 02:23:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:58,108 INFO L225 Difference]: With dead ends: 610 [2021-05-22 02:23:58,109 INFO L226 Difference]: Without dead ends: 591 [2021-05-22 02:23:58,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-22 02:23:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 293. [2021-05-22 02:23:58,112 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) [2021-05-22 02:23:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 873 transitions. [2021-05-22 02:23:58,113 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 873 transitions. Word has length 18 [2021-05-22 02:23:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:58,113 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 873 transitions. [2021-05-22 02:23:58,113 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) [2021-05-22 02:23:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 873 transitions. [2021-05-22 02:23:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:58,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:58,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:58,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:58,314 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash 327129171, now seen corresponding path program 38 times [2021-05-22 02:23:58,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:58,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914638849] [2021-05-22 02:23:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:58,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:58,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914638849] [2021-05-22 02:23:58,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914638849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:58,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048104127] [2021-05-22 02:23:58,353 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 [2021-05-22 02:23:58,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:58,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:58,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048104127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:58,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:58,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:23:58,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457061969] [2021-05-22 02:23:58,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:23:58,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:23:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:23:58,451 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) [2021-05-22 02:23:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:58,595 INFO L93 Difference]: Finished difference Result 598 states and 1692 transitions. [2021-05-22 02:23:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:58,595 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 [2021-05-22 02:23:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:58,596 INFO L225 Difference]: With dead ends: 598 [2021-05-22 02:23:58,596 INFO L226 Difference]: Without dead ends: 575 [2021-05-22 02:23:58,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-05-22 02:23:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 295. [2021-05-22 02:23:58,599 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) [2021-05-22 02:23:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-05-22 02:23:58,600 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-05-22 02:23:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:58,600 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-05-22 02:23:58,600 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) [2021-05-22 02:23:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-05-22 02:23:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:58,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:58,600 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:58,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:58,801 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash -332522313, now seen corresponding path program 39 times [2021-05-22 02:23:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:58,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081856566] [2021-05-22 02:23:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:58,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:58,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081856566] [2021-05-22 02:23:58,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081856566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:58,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840680727] [2021-05-22 02:23:58,851 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 [2021-05-22 02:23:58,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:58,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:58,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840680727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:58,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:58,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:23:58,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472653098] [2021-05-22 02:23:58,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:23:58,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:23:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:58,977 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) [2021-05-22 02:23:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:59,150 INFO L93 Difference]: Finished difference Result 653 states and 1829 transitions. [2021-05-22 02:23:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:59,151 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 [2021-05-22 02:23:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:59,151 INFO L225 Difference]: With dead ends: 653 [2021-05-22 02:23:59,151 INFO L226 Difference]: Without dead ends: 634 [2021-05-22 02:23:59,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:23:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-05-22 02:23:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 292. [2021-05-22 02:23:59,155 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) [2021-05-22 02:23:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 871 transitions. [2021-05-22 02:23:59,156 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 871 transitions. Word has length 18 [2021-05-22 02:23:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:59,156 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 871 transitions. [2021-05-22 02:23:59,156 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) [2021-05-22 02:23:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 871 transitions. [2021-05-22 02:23:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:59,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:59,156 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:59,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:59,357 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash -513650761, now seen corresponding path program 40 times [2021-05-22 02:23:59,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:59,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005644589] [2021-05-22 02:23:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:59,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005644589] [2021-05-22 02:23:59,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005644589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513947669] [2021-05-22 02:23:59,401 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 [2021-05-22 02:23:59,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:59,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513947669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:59,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:59,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:23:59,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743144721] [2021-05-22 02:23:59,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:23:59,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:23:59,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:23:59,509 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) [2021-05-22 02:23:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:59,645 INFO L93 Difference]: Finished difference Result 634 states and 1800 transitions. [2021-05-22 02:23:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:23:59,645 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 [2021-05-22 02:23:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:59,646 INFO L225 Difference]: With dead ends: 634 [2021-05-22 02:23:59,646 INFO L226 Difference]: Without dead ends: 615 [2021-05-22 02:23:59,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-05-22 02:23:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 288. [2021-05-22 02:23:59,649 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) [2021-05-22 02:23:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 851 transitions. [2021-05-22 02:23:59,650 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 851 transitions. Word has length 18 [2021-05-22 02:23:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:59,650 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 851 transitions. [2021-05-22 02:23:59,650 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) [2021-05-22 02:23:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 851 transitions. [2021-05-22 02:23:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:59,650 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:59,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:59,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:59,851 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1900023759, now seen corresponding path program 41 times [2021-05-22 02:23:59,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:59,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573906326] [2021-05-22 02:23:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:59,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:59,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573906326] [2021-05-22 02:23:59,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573906326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:59,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266103334] [2021-05-22 02:23:59,897 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 [2021-05-22 02:23:59,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:59,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:23:59,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:00,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266103334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:00,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:00,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:00,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900598183] [2021-05-22 02:24:00,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:00,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:00,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:00,021 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) [2021-05-22 02:24:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:00,229 INFO L93 Difference]: Finished difference Result 606 states and 1702 transitions. [2021-05-22 02:24:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:00,229 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 [2021-05-22 02:24:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:00,230 INFO L225 Difference]: With dead ends: 606 [2021-05-22 02:24:00,230 INFO L226 Difference]: Without dead ends: 583 [2021-05-22 02:24:00,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-22 02:24:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 296. [2021-05-22 02:24:00,233 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) [2021-05-22 02:24:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 873 transitions. [2021-05-22 02:24:00,234 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 873 transitions. Word has length 18 [2021-05-22 02:24:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:00,234 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 873 transitions. [2021-05-22 02:24:00,234 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) [2021-05-22 02:24:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 873 transitions. [2021-05-22 02:24:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:00,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:00,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:00,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-22 02:24:00,435 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1416386093, now seen corresponding path program 42 times [2021-05-22 02:24:00,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:00,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007140716] [2021-05-22 02:24:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:00,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:00,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007140716] [2021-05-22 02:24:00,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007140716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:00,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800906104] [2021-05-22 02:24:00,515 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 [2021-05-22 02:24:00,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:00,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:00,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:00,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:00,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800906104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:00,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:00,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193152383] [2021-05-22 02:24:00,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:00,615 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) [2021-05-22 02:24:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:00,807 INFO L93 Difference]: Finished difference Result 590 states and 1672 transitions. [2021-05-22 02:24:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:00,807 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 [2021-05-22 02:24:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:00,808 INFO L225 Difference]: With dead ends: 590 [2021-05-22 02:24:00,808 INFO L226 Difference]: Without dead ends: 571 [2021-05-22 02:24:00,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-22 02:24:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 285. [2021-05-22 02:24:00,811 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) [2021-05-22 02:24:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-05-22 02:24:00,812 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-05-22 02:24:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:00,812 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-05-22 02:24:00,812 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) [2021-05-22 02:24:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-05-22 02:24:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:00,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:00,812 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:01,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-05-22 02:24:01,014 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1542604225, now seen corresponding path program 43 times [2021-05-22 02:24:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:01,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985685035] [2021-05-22 02:24:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:01,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:01,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985685035] [2021-05-22 02:24:01,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985685035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:01,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760233669] [2021-05-22 02:24:01,063 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 [2021-05-22 02:24:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:01,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760233669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:01,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:01,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:01,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577341966] [2021-05-22 02:24:01,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:01,161 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) [2021-05-22 02:24:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:01,377 INFO L93 Difference]: Finished difference Result 479 states and 1339 transitions. [2021-05-22 02:24:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:01,377 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 [2021-05-22 02:24:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:01,377 INFO L225 Difference]: With dead ends: 479 [2021-05-22 02:24:01,377 INFO L226 Difference]: Without dead ends: 460 [2021-05-22 02:24:01,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-22 02:24:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 289. [2021-05-22 02:24:01,381 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) [2021-05-22 02:24:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 848 transitions. [2021-05-22 02:24:01,381 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 848 transitions. Word has length 18 [2021-05-22 02:24:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:01,381 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 848 transitions. [2021-05-22 02:24:01,381 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) [2021-05-22 02:24:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 848 transitions. [2021-05-22 02:24:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:01,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:01,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:01,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:01,582 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:01,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1745377557, now seen corresponding path program 44 times [2021-05-22 02:24:01,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:01,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669059183] [2021-05-22 02:24:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:01,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:01,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669059183] [2021-05-22 02:24:01,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669059183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:01,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714730787] [2021-05-22 02:24:01,628 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 [2021-05-22 02:24:01,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:01,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:01,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:01,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714730787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:01,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:01,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:01,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833174313] [2021-05-22 02:24:01,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:01,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:01,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:01,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:01,757 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) [2021-05-22 02:24:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:02,000 INFO L93 Difference]: Finished difference Result 485 states and 1345 transitions. [2021-05-22 02:24:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:02,000 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 [2021-05-22 02:24:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:02,001 INFO L225 Difference]: With dead ends: 485 [2021-05-22 02:24:02,001 INFO L226 Difference]: Without dead ends: 462 [2021-05-22 02:24:02,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-05-22 02:24:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 297. [2021-05-22 02:24:02,004 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) [2021-05-22 02:24:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 870 transitions. [2021-05-22 02:24:02,005 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 870 transitions. Word has length 18 [2021-05-22 02:24:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:02,005 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 870 transitions. [2021-05-22 02:24:02,005 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) [2021-05-22 02:24:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 870 transitions. [2021-05-22 02:24:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:02,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:02,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:02,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-05-22 02:24:02,206 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:02,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1334230119, now seen corresponding path program 45 times [2021-05-22 02:24:02,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:02,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089531579] [2021-05-22 02:24:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:02,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:02,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089531579] [2021-05-22 02:24:02,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089531579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:02,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512006855] [2021-05-22 02:24:02,260 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 [2021-05-22 02:24:02,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:02,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:02,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512006855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:02,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:02,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:02,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044034391] [2021-05-22 02:24:02,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:02,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:02,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:02,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:02,382 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) [2021-05-22 02:24:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:02,606 INFO L93 Difference]: Finished difference Result 469 states and 1315 transitions. [2021-05-22 02:24:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:02,606 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 [2021-05-22 02:24:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:02,607 INFO L225 Difference]: With dead ends: 469 [2021-05-22 02:24:02,607 INFO L226 Difference]: Without dead ends: 450 [2021-05-22 02:24:02,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-22 02:24:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 285. [2021-05-22 02:24:02,610 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) [2021-05-22 02:24:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-05-22 02:24:02,610 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-05-22 02:24:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:02,610 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-05-22 02:24:02,610 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) [2021-05-22 02:24:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-05-22 02:24:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:02,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:02,611 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:02,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-05-22 02:24:02,813 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:02,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1633409787, now seen corresponding path program 46 times [2021-05-22 02:24:02,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:02,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695785617] [2021-05-22 02:24:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:02,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695785617] [2021-05-22 02:24:02,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695785617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026780477] [2021-05-22 02:24:02,858 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 [2021-05-22 02:24:02,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:02,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:02,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:02,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026780477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:02,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:02,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:02,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109321283] [2021-05-22 02:24:02,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:02,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:02,965 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) [2021-05-22 02:24:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:03,163 INFO L93 Difference]: Finished difference Result 433 states and 1220 transitions. [2021-05-22 02:24:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:03,163 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 [2021-05-22 02:24:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:03,164 INFO L225 Difference]: With dead ends: 433 [2021-05-22 02:24:03,164 INFO L226 Difference]: Without dead ends: 406 [2021-05-22 02:24:03,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-22 02:24:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 287. [2021-05-22 02:24:03,168 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) [2021-05-22 02:24:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 843 transitions. [2021-05-22 02:24:03,168 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 843 transitions. Word has length 18 [2021-05-22 02:24:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:03,168 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 843 transitions. [2021-05-22 02:24:03,169 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) [2021-05-22 02:24:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 843 transitions. [2021-05-22 02:24:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:03,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:03,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:03,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:03,370 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash 44908247, now seen corresponding path program 6 times [2021-05-22 02:24:03,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:03,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752626543] [2021-05-22 02:24:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:03,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:03,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752626543] [2021-05-22 02:24:03,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752626543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:03,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896910661] [2021-05-22 02:24:03,420 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 [2021-05-22 02:24:03,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:03,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:03,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:24:03,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:03,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896910661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:03,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:03,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:03,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549533114] [2021-05-22 02:24:03,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:03,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:03,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:03,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:03,501 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) [2021-05-22 02:24:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:03,653 INFO L93 Difference]: Finished difference Result 476 states and 1332 transitions. [2021-05-22 02:24:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:03,653 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 [2021-05-22 02:24:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:03,654 INFO L225 Difference]: With dead ends: 476 [2021-05-22 02:24:03,654 INFO L226 Difference]: Without dead ends: 454 [2021-05-22 02:24:03,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-22 02:24:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 289. [2021-05-22 02:24:03,657 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) [2021-05-22 02:24:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-05-22 02:24:03,658 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-05-22 02:24:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:03,658 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-05-22 02:24:03,658 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) [2021-05-22 02:24:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-05-22 02:24:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:03,658 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:03,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:03,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-05-22 02:24:03,859 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:03,859 INFO L82 PathProgramCache]: Analyzing trace with hash -675858551, now seen corresponding path program 47 times [2021-05-22 02:24:03,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:03,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943146384] [2021-05-22 02:24:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:03,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:03,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943146384] [2021-05-22 02:24:03,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943146384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699514284] [2021-05-22 02:24:03,915 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 [2021-05-22 02:24:03,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:03,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699514284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:04,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:04,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:04,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126499361] [2021-05-22 02:24:04,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:04,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:04,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:04,032 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) [2021-05-22 02:24:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:04,250 INFO L93 Difference]: Finished difference Result 434 states and 1224 transitions. [2021-05-22 02:24:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:04,250 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 [2021-05-22 02:24:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:04,256 INFO L225 Difference]: With dead ends: 434 [2021-05-22 02:24:04,256 INFO L226 Difference]: Without dead ends: 411 [2021-05-22 02:24:04,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-22 02:24:04,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 297. [2021-05-22 02:24:04,260 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) [2021-05-22 02:24:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-05-22 02:24:04,261 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-05-22 02:24:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:04,261 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-05-22 02:24:04,261 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) [2021-05-22 02:24:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-05-22 02:24:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:04,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:04,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:04,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:04,469 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash 438614075, now seen corresponding path program 7 times [2021-05-22 02:24:04,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:04,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143740797] [2021-05-22 02:24:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:04,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143740797] [2021-05-22 02:24:04,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143740797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:04,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9852330] [2021-05-22 02:24:04,505 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 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 [2021-05-22 02:24:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:24:04,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9852330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:04,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:04,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:04,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595499908] [2021-05-22 02:24:04,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:04,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:04,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:04,592 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) [2021-05-22 02:24:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:04,711 INFO L93 Difference]: Finished difference Result 491 states and 1363 transitions. [2021-05-22 02:24:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:04,711 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 [2021-05-22 02:24:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:04,712 INFO L225 Difference]: With dead ends: 491 [2021-05-22 02:24:04,712 INFO L226 Difference]: Without dead ends: 469 [2021-05-22 02:24:04,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-22 02:24:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 297. [2021-05-22 02:24:04,715 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) [2021-05-22 02:24:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-05-22 02:24:04,716 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-05-22 02:24:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:04,716 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-05-22 02:24:04,716 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) [2021-05-22 02:24:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-05-22 02:24:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:04,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:04,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:04,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2021-05-22 02:24:04,917 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1891218171, now seen corresponding path program 48 times [2021-05-22 02:24:04,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:04,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86776460] [2021-05-22 02:24:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86776460] [2021-05-22 02:24:04,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86776460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192855703] [2021-05-22 02:24:04,977 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 [2021-05-22 02:24:05,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:05,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192855703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:05,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:05,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:05,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292456496] [2021-05-22 02:24:05,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:05,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:05,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:05,119 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) [2021-05-22 02:24:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:05,336 INFO L93 Difference]: Finished difference Result 409 states and 1172 transitions. [2021-05-22 02:24:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:05,337 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 [2021-05-22 02:24:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:05,337 INFO L225 Difference]: With dead ends: 409 [2021-05-22 02:24:05,337 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:24:05,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:24:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 291. [2021-05-22 02:24:05,340 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) [2021-05-22 02:24:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-05-22 02:24:05,341 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 18 [2021-05-22 02:24:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:05,341 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-05-22 02:24:05,341 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) [2021-05-22 02:24:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-05-22 02:24:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:05,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:05,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:05,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-22 02:24:05,560 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1494230001, now seen corresponding path program 8 times [2021-05-22 02:24:05,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:05,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945944439] [2021-05-22 02:24:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:05,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945944439] [2021-05-22 02:24:05,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945944439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:05,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:05,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 02:24:05,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140513416] [2021-05-22 02:24:05,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:05,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:05,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:05,599 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) [2021-05-22 02:24:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:05,705 INFO L93 Difference]: Finished difference Result 449 states and 1262 transitions. [2021-05-22 02:24:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:05,706 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 [2021-05-22 02:24:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:05,706 INFO L225 Difference]: With dead ends: 449 [2021-05-22 02:24:05,706 INFO L226 Difference]: Without dead ends: 420 [2021-05-22 02:24:05,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-22 02:24:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 289. [2021-05-22 02:24:05,710 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) [2021-05-22 02:24:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-05-22 02:24:05,710 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-05-22 02:24:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:05,710 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-05-22 02:24:05,710 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) [2021-05-22 02:24:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-05-22 02:24:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:05,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:05,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:05,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-05-22 02:24:05,711 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:05,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1770591994, now seen corresponding path program 6 times [2021-05-22 02:24:05,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:05,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956676073] [2021-05-22 02:24:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:05,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956676073] [2021-05-22 02:24:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956676073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:05,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707602608] [2021-05-22 02:24:05,738 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 [2021-05-22 02:24:05,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:05,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:24:05,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707602608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:05,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:05,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-22 02:24:05,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311273250] [2021-05-22 02:24:05,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:05,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:05,826 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) [2021-05-22 02:24:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:05,928 INFO L93 Difference]: Finished difference Result 435 states and 1232 transitions. [2021-05-22 02:24:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:05,929 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 [2021-05-22 02:24:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:05,929 INFO L225 Difference]: With dead ends: 435 [2021-05-22 02:24:05,929 INFO L226 Difference]: Without dead ends: 347 [2021-05-22 02:24:05,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-22 02:24:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 255. [2021-05-22 02:24:05,932 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) [2021-05-22 02:24:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 757 transitions. [2021-05-22 02:24:05,932 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 757 transitions. Word has length 18 [2021-05-22 02:24:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:05,932 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 757 transitions. [2021-05-22 02:24:05,933 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) [2021-05-22 02:24:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 757 transitions. [2021-05-22 02:24:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:05,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:05,933 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:06,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:06,134 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash 698798277, now seen corresponding path program 49 times [2021-05-22 02:24:06,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:06,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789221637] [2021-05-22 02:24:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789221637] [2021-05-22 02:24:06,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789221637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039310385] [2021-05-22 02:24:06,192 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 [2021-05-22 02:24:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:06,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:06,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039310385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:06,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:06,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-22 02:24:06,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860973094] [2021-05-22 02:24:06,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:06,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:06,301 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) [2021-05-22 02:24:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:06,508 INFO L93 Difference]: Finished difference Result 457 states and 1299 transitions. [2021-05-22 02:24:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:06,508 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 [2021-05-22 02:24:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:06,508 INFO L225 Difference]: With dead ends: 457 [2021-05-22 02:24:06,508 INFO L226 Difference]: Without dead ends: 438 [2021-05-22 02:24:06,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-22 02:24:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 260. [2021-05-22 02:24:06,512 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) [2021-05-22 02:24:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-05-22 02:24:06,512 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 18 [2021-05-22 02:24:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:06,512 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-05-22 02:24:06,512 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) [2021-05-22 02:24:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-05-22 02:24:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:06,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:06,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:06,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:06,717 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:06,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1628959453, now seen corresponding path program 50 times [2021-05-22 02:24:06,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:06,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809420532] [2021-05-22 02:24:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:06,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809420532] [2021-05-22 02:24:06,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809420532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:06,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038857522] [2021-05-22 02:24:06,762 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 [2021-05-22 02:24:06,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:06,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:06,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038857522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:06,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:06,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:06,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743438358] [2021-05-22 02:24:06,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:06,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:06,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:06,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:06,861 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) [2021-05-22 02:24:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:07,091 INFO L93 Difference]: Finished difference Result 461 states and 1299 transitions. [2021-05-22 02:24:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:07,092 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 [2021-05-22 02:24:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:07,092 INFO L225 Difference]: With dead ends: 461 [2021-05-22 02:24:07,092 INFO L226 Difference]: Without dead ends: 438 [2021-05-22 02:24:07,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-22 02:24:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 258. [2021-05-22 02:24:07,095 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) [2021-05-22 02:24:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-05-22 02:24:07,096 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 18 [2021-05-22 02:24:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:07,096 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-05-22 02:24:07,096 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) [2021-05-22 02:24:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-05-22 02:24:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:07,096 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:07,096 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:07,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:07,297 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash 616266921, now seen corresponding path program 51 times [2021-05-22 02:24:07,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:07,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145446655] [2021-05-22 02:24:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:07,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145446655] [2021-05-22 02:24:07,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145446655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:07,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170369528] [2021-05-22 02:24:07,338 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 [2021-05-22 02:24:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:07,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:07,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170369528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:07,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:07,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:24:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372468936] [2021-05-22 02:24:07,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:07,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:07,434 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) [2021-05-22 02:24:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:07,634 INFO L93 Difference]: Finished difference Result 455 states and 1280 transitions. [2021-05-22 02:24:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:07,634 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 [2021-05-22 02:24:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:07,635 INFO L225 Difference]: With dead ends: 455 [2021-05-22 02:24:07,635 INFO L226 Difference]: Without dead ends: 428 [2021-05-22 02:24:07,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-22 02:24:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 258. [2021-05-22 02:24:07,638 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) [2021-05-22 02:24:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 767 transitions. [2021-05-22 02:24:07,638 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 767 transitions. Word has length 18 [2021-05-22 02:24:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:07,639 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 767 transitions. [2021-05-22 02:24:07,639 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) [2021-05-22 02:24:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 767 transitions. [2021-05-22 02:24:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:07,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:07,639 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:07,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-05-22 02:24:07,840 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:07,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1345274345, now seen corresponding path program 9 times [2021-05-22 02:24:07,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:07,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114174730] [2021-05-22 02:24:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114174730] [2021-05-22 02:24:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114174730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545656690] [2021-05-22 02:24:07,857 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 [2021-05-22 02:24:07,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:07,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545656690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:07,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:07,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-22 02:24:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48965495] [2021-05-22 02:24:07,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:07,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:07,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:07,928 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) [2021-05-22 02:24:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:07,969 INFO L93 Difference]: Finished difference Result 393 states and 1148 transitions. [2021-05-22 02:24:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:24:07,969 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 [2021-05-22 02:24:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:07,970 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:24:07,970 INFO L226 Difference]: Without dead ends: 353 [2021-05-22 02:24:07,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-22 02:24:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 247. [2021-05-22 02:24:07,973 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) [2021-05-22 02:24:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 735 transitions. [2021-05-22 02:24:07,973 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 735 transitions. Word has length 18 [2021-05-22 02:24:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:07,973 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 735 transitions. [2021-05-22 02:24:07,973 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) [2021-05-22 02:24:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 735 transitions. [2021-05-22 02:24:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:07,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:07,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:08,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-05-22 02:24:08,174 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1782534729, now seen corresponding path program 52 times [2021-05-22 02:24:08,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:08,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263634519] [2021-05-22 02:24:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263634519] [2021-05-22 02:24:08,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263634519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338911107] [2021-05-22 02:24:08,222 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 [2021-05-22 02:24:08,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:08,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:08,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:08,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338911107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:08,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:08,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-22 02:24:08,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402593537] [2021-05-22 02:24:08,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:08,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:08,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:08,307 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) [2021-05-22 02:24:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:08,459 INFO L93 Difference]: Finished difference Result 487 states and 1353 transitions. [2021-05-22 02:24:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:08,459 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 [2021-05-22 02:24:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:08,460 INFO L225 Difference]: With dead ends: 487 [2021-05-22 02:24:08,460 INFO L226 Difference]: Without dead ends: 468 [2021-05-22 02:24:08,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-22 02:24:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 253. [2021-05-22 02:24:08,463 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) [2021-05-22 02:24:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-05-22 02:24:08,463 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 18 [2021-05-22 02:24:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:08,463 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-05-22 02:24:08,463 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) [2021-05-22 02:24:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-05-22 02:24:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:08,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:08,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:08,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-05-22 02:24:08,664 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1582271391, now seen corresponding path program 53 times [2021-05-22 02:24:08,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:08,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625227997] [2021-05-22 02:24:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:08,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625227997] [2021-05-22 02:24:08,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625227997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:08,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314769087] [2021-05-22 02:24:08,704 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 [2021-05-22 02:24:08,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:08,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314769087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:08,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:08,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:08,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244359568] [2021-05-22 02:24:08,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:08,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:08,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:08,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:08,821 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) [2021-05-22 02:24:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:09,020 INFO L93 Difference]: Finished difference Result 491 states and 1353 transitions. [2021-05-22 02:24:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:09,020 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 [2021-05-22 02:24:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:09,021 INFO L225 Difference]: With dead ends: 491 [2021-05-22 02:24:09,021 INFO L226 Difference]: Without dead ends: 468 [2021-05-22 02:24:09,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-22 02:24:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-05-22 02:24:09,025 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) [2021-05-22 02:24:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 764 transitions. [2021-05-22 02:24:09,026 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 764 transitions. Word has length 18 [2021-05-22 02:24:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,026 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 764 transitions. [2021-05-22 02:24:09,026 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) [2021-05-22 02:24:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 764 transitions. [2021-05-22 02:24:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:09,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:09,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:09,227 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash -951095685, now seen corresponding path program 10 times [2021-05-22 02:24:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:09,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727501973] [2021-05-22 02:24:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727501973] [2021-05-22 02:24:09,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727501973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:09,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417346134] [2021-05-22 02:24:09,246 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 [2021-05-22 02:24:09,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417346134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:09,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:09,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-22 02:24:09,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290565312] [2021-05-22 02:24:09,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:09,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:09,317 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) [2021-05-22 02:24:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:09,367 INFO L93 Difference]: Finished difference Result 360 states and 1024 transitions. [2021-05-22 02:24:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:24:09,367 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 [2021-05-22 02:24:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:09,367 INFO L225 Difference]: With dead ends: 360 [2021-05-22 02:24:09,367 INFO L226 Difference]: Without dead ends: 320 [2021-05-22 02:24:09,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-22 02:24:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 249. [2021-05-22 02:24:09,370 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) [2021-05-22 02:24:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 737 transitions. [2021-05-22 02:24:09,370 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 737 transitions. Word has length 18 [2021-05-22 02:24:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,370 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 737 transitions. [2021-05-22 02:24:09,370 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) [2021-05-22 02:24:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 737 transitions. [2021-05-22 02:24:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:09,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:09,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-22 02:24:09,584 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2053044421, now seen corresponding path program 54 times [2021-05-22 02:24:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:09,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925173323] [2021-05-22 02:24:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925173323] [2021-05-22 02:24:09,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925173323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809262996] [2021-05-22 02:24:09,633 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 [2021-05-22 02:24:09,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:09,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809262996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:09,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:09,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:24:09,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618237994] [2021-05-22 02:24:09,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:24:09,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:09,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:24:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:09,754 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) [2021-05-22 02:24:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:09,941 INFO L93 Difference]: Finished difference Result 461 states and 1276 transitions. [2021-05-22 02:24:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:09,941 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 [2021-05-22 02:24:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:09,942 INFO L225 Difference]: With dead ends: 461 [2021-05-22 02:24:09,942 INFO L226 Difference]: Without dead ends: 442 [2021-05-22 02:24:09,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-22 02:24:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 246. [2021-05-22 02:24:09,945 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) [2021-05-22 02:24:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 734 transitions. [2021-05-22 02:24:09,945 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 734 transitions. Word has length 18 [2021-05-22 02:24:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,945 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 734 transitions. [2021-05-22 02:24:09,945 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) [2021-05-22 02:24:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 734 transitions. [2021-05-22 02:24:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:09,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:10,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:10,146 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1871915973, now seen corresponding path program 55 times [2021-05-22 02:24:10,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:10,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945780872] [2021-05-22 02:24:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:10,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945780872] [2021-05-22 02:24:10,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945780872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:10,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91910485] [2021-05-22 02:24:10,188 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 [2021-05-22 02:24:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:10,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91910485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:10,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:10,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:10,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197795576] [2021-05-22 02:24:10,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:10,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:10,277 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) [2021-05-22 02:24:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:10,386 INFO L93 Difference]: Finished difference Result 433 states and 1225 transitions. [2021-05-22 02:24:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:10,386 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 [2021-05-22 02:24:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:10,387 INFO L225 Difference]: With dead ends: 433 [2021-05-22 02:24:10,387 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:24:10,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:24:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 242. [2021-05-22 02:24:10,390 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) [2021-05-22 02:24:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 714 transitions. [2021-05-22 02:24:10,391 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 714 transitions. Word has length 18 [2021-05-22 02:24:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:10,391 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 714 transitions. [2021-05-22 02:24:10,391 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) [2021-05-22 02:24:10,391 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 714 transitions. [2021-05-22 02:24:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:10,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:10,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:10,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:10,605 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash -116472655, now seen corresponding path program 11 times [2021-05-22 02:24:10,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:10,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112674791] [2021-05-22 02:24:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:10,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112674791] [2021-05-22 02:24:10,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112674791] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:10,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:10,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:10,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550303482] [2021-05-22 02:24:10,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:10,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:10,640 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) [2021-05-22 02:24:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:10,697 INFO L93 Difference]: Finished difference Result 287 states and 821 transitions. [2021-05-22 02:24:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:24:10,697 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 [2021-05-22 02:24:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:10,698 INFO L225 Difference]: With dead ends: 287 [2021-05-22 02:24:10,698 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:24:10,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:24:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 210. [2021-05-22 02:24:10,700 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) [2021-05-22 02:24:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 613 transitions. [2021-05-22 02:24:10,700 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 613 transitions. Word has length 18 [2021-05-22 02:24:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:10,700 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 613 transitions. [2021-05-22 02:24:10,700 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) [2021-05-22 02:24:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 613 transitions. [2021-05-22 02:24:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:10,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:10,701 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:10,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-05-22 02:24:10,701 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -9376803, now seen corresponding path program 56 times [2021-05-22 02:24:10,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:10,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946876441] [2021-05-22 02:24:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946876441] [2021-05-22 02:24:10,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946876441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593953625] [2021-05-22 02:24:10,749 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 [2021-05-22 02:24:10,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593953625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:10,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:10,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:24:10,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134555039] [2021-05-22 02:24:10,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:10,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:10,853 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) [2021-05-22 02:24:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:11,078 INFO L93 Difference]: Finished difference Result 427 states and 1174 transitions. [2021-05-22 02:24:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:11,079 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 [2021-05-22 02:24:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:11,079 INFO L225 Difference]: With dead ends: 427 [2021-05-22 02:24:11,079 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:24:11,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:24:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 218. [2021-05-22 02:24:11,082 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) [2021-05-22 02:24:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 635 transitions. [2021-05-22 02:24:11,082 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 635 transitions. Word has length 18 [2021-05-22 02:24:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:11,082 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 635 transitions. [2021-05-22 02:24:11,082 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) [2021-05-22 02:24:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 635 transitions. [2021-05-22 02:24:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:11,083 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:11,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:11,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-05-22 02:24:11,283 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash 969180641, now seen corresponding path program 57 times [2021-05-22 02:24:11,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:11,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391527184] [2021-05-22 02:24:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:11,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391527184] [2021-05-22 02:24:11,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391527184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:11,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227482967] [2021-05-22 02:24:11,326 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 [2021-05-22 02:24:11,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:11,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227482967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:11,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:11,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:11,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795101105] [2021-05-22 02:24:11,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:11,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:11,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:11,411 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) [2021-05-22 02:24:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:11,581 INFO L93 Difference]: Finished difference Result 411 states and 1144 transitions. [2021-05-22 02:24:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:11,582 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 [2021-05-22 02:24:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:11,582 INFO L225 Difference]: With dead ends: 411 [2021-05-22 02:24:11,582 INFO L226 Difference]: Without dead ends: 392 [2021-05-22 02:24:11,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-22 02:24:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 209. [2021-05-22 02:24:11,585 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) [2021-05-22 02:24:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-05-22 02:24:11,585 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-05-22 02:24:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:11,585 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-05-22 02:24:11,585 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) [2021-05-22 02:24:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-05-22 02:24:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:11,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:11,585 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:11,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:11,786 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358893, now seen corresponding path program 58 times [2021-05-22 02:24:11,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:11,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129144343] [2021-05-22 02:24:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129144343] [2021-05-22 02:24:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129144343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194239271] [2021-05-22 02:24:11,830 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 [2021-05-22 02:24:11,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:11,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:11,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:11,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194239271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:11,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:11,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:24:11,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987686596] [2021-05-22 02:24:11,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:11,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:11,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:11,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:11,909 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) [2021-05-22 02:24:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,095 INFO L93 Difference]: Finished difference Result 371 states and 1026 transitions. [2021-05-22 02:24:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:12,095 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 [2021-05-22 02:24:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,096 INFO L225 Difference]: With dead ends: 371 [2021-05-22 02:24:12,096 INFO L226 Difference]: Without dead ends: 344 [2021-05-22 02:24:12,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-22 02:24:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 211. [2021-05-22 02:24:12,098 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) [2021-05-22 02:24:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 613 transitions. [2021-05-22 02:24:12,099 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 613 transitions. Word has length 18 [2021-05-22 02:24:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,099 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 613 transitions. [2021-05-22 02:24:12,099 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) [2021-05-22 02:24:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 613 transitions. [2021-05-22 02:24:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:12,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:12,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:12,300 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1750676137, now seen corresponding path program 59 times [2021-05-22 02:24:12,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683370813] [2021-05-22 02:24:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683370813] [2021-05-22 02:24:12,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683370813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:12,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896960063] [2021-05-22 02:24:12,343 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 [2021-05-22 02:24:12,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:12,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896960063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:12,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:12,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:12,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844109579] [2021-05-22 02:24:12,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:12,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:12,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:12,434 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) [2021-05-22 02:24:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,631 INFO L93 Difference]: Finished difference Result 363 states and 1008 transitions. [2021-05-22 02:24:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:12,631 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 [2021-05-22 02:24:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,632 INFO L225 Difference]: With dead ends: 363 [2021-05-22 02:24:12,632 INFO L226 Difference]: Without dead ends: 340 [2021-05-22 02:24:12,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:12,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-22 02:24:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 219. [2021-05-22 02:24:12,635 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) [2021-05-22 02:24:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 635 transitions. [2021-05-22 02:24:12,635 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 635 transitions. Word has length 18 [2021-05-22 02:24:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,635 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 635 transitions. [2021-05-22 02:24:12,635 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) [2021-05-22 02:24:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 635 transitions. [2021-05-22 02:24:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:12,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:12,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-05-22 02:24:12,836 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1565733715, now seen corresponding path program 60 times [2021-05-22 02:24:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413679533] [2021-05-22 02:24:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413679533] [2021-05-22 02:24:12,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413679533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:12,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521401480] [2021-05-22 02:24:12,900 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 [2021-05-22 02:24:12,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:12,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:12,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:13,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521401480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:13,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:13,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:13,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238763440] [2021-05-22 02:24:13,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:13,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:13,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:13,027 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) [2021-05-22 02:24:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:13,257 INFO L93 Difference]: Finished difference Result 338 states and 956 transitions. [2021-05-22 02:24:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:13,258 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 [2021-05-22 02:24:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:13,258 INFO L225 Difference]: With dead ends: 338 [2021-05-22 02:24:13,258 INFO L226 Difference]: Without dead ends: 319 [2021-05-22 02:24:13,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-22 02:24:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 209. [2021-05-22 02:24:13,260 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) [2021-05-22 02:24:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-05-22 02:24:13,261 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-05-22 02:24:13,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:13,261 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-05-22 02:24:13,261 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) [2021-05-22 02:24:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-05-22 02:24:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:13,261 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:13,261 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:13,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:13,462 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:13,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2071414893, now seen corresponding path program 61 times [2021-05-22 02:24:13,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:13,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668630826] [2021-05-22 02:24:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:13,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:13,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668630826] [2021-05-22 02:24:13,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668630826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:13,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506943046] [2021-05-22 02:24:13,525 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 [2021-05-22 02:24:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:13,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:13,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506943046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:13,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:13,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:13,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148063969] [2021-05-22 02:24:13,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:13,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:13,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:13,651 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) [2021-05-22 02:24:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:13,870 INFO L93 Difference]: Finished difference Result 369 states and 1028 transitions. [2021-05-22 02:24:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:13,870 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 [2021-05-22 02:24:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:13,871 INFO L225 Difference]: With dead ends: 369 [2021-05-22 02:24:13,871 INFO L226 Difference]: Without dead ends: 350 [2021-05-22 02:24:13,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-22 02:24:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 214. [2021-05-22 02:24:13,873 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) [2021-05-22 02:24:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 622 transitions. [2021-05-22 02:24:13,874 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 622 transitions. Word has length 18 [2021-05-22 02:24:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:13,874 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 622 transitions. [2021-05-22 02:24:13,874 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) [2021-05-22 02:24:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 622 transitions. [2021-05-22 02:24:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:13,874 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:13,874 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:14,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-05-22 02:24:14,075 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:14,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2067720571, now seen corresponding path program 62 times [2021-05-22 02:24:14,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:14,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028268085] [2021-05-22 02:24:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:14,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:14,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028268085] [2021-05-22 02:24:14,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028268085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:14,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892549323] [2021-05-22 02:24:14,154 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 [2021-05-22 02:24:14,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:14,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:14,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892549323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:14,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:14,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:14,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897874826] [2021-05-22 02:24:14,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:14,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:14,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:14,284 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) [2021-05-22 02:24:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:14,509 INFO L93 Difference]: Finished difference Result 412 states and 1121 transitions. [2021-05-22 02:24:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:14,510 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 [2021-05-22 02:24:14,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:14,510 INFO L225 Difference]: With dead ends: 412 [2021-05-22 02:24:14,510 INFO L226 Difference]: Without dead ends: 393 [2021-05-22 02:24:14,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-22 02:24:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-05-22 02:24:14,513 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) [2021-05-22 02:24:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 629 transitions. [2021-05-22 02:24:14,513 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 629 transitions. Word has length 18 [2021-05-22 02:24:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:14,514 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 629 transitions. [2021-05-22 02:24:14,514 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) [2021-05-22 02:24:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 629 transitions. [2021-05-22 02:24:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:14,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:14,514 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:14,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-05-22 02:24:14,715 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:14,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1297085549, now seen corresponding path program 63 times [2021-05-22 02:24:14,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:14,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146543819] [2021-05-22 02:24:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:14,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:14,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146543819] [2021-05-22 02:24:14,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146543819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:14,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944142414] [2021-05-22 02:24:14,766 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 [2021-05-22 02:24:14,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:14,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:14,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944142414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:14,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:14,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:14,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630634797] [2021-05-22 02:24:14,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:14,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:14,873 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) [2021-05-22 02:24:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:15,086 INFO L93 Difference]: Finished difference Result 375 states and 1035 transitions. [2021-05-22 02:24:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:15,086 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 [2021-05-22 02:24:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:15,087 INFO L225 Difference]: With dead ends: 375 [2021-05-22 02:24:15,087 INFO L226 Difference]: Without dead ends: 352 [2021-05-22 02:24:15,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-22 02:24:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-05-22 02:24:15,089 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) [2021-05-22 02:24:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-22 02:24:15,089 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-22 02:24:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:15,089 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-22 02:24:15,090 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) [2021-05-22 02:24:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-22 02:24:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:15,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:15,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:15,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:15,290 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1181922291, now seen corresponding path program 64 times [2021-05-22 02:24:15,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:15,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501223644] [2021-05-22 02:24:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:15,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:15,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501223644] [2021-05-22 02:24:15,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501223644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:15,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151253350] [2021-05-22 02:24:15,343 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 [2021-05-22 02:24:15,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:15,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:15,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:15,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151253350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:15,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:15,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:15,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38968224] [2021-05-22 02:24:15,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:15,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:15,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:15,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:15,440 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) [2021-05-22 02:24:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:15,667 INFO L93 Difference]: Finished difference Result 392 states and 1071 transitions. [2021-05-22 02:24:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:15,668 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 [2021-05-22 02:24:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:15,668 INFO L225 Difference]: With dead ends: 392 [2021-05-22 02:24:15,668 INFO L226 Difference]: Without dead ends: 373 [2021-05-22 02:24:15,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-22 02:24:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-05-22 02:24:15,671 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) [2021-05-22 02:24:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 631 transitions. [2021-05-22 02:24:15,671 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 631 transitions. Word has length 18 [2021-05-22 02:24:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:15,671 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 631 transitions. [2021-05-22 02:24:15,671 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) [2021-05-22 02:24:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 631 transitions. [2021-05-22 02:24:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:15,672 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:15,672 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:15,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:15,872 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2112083467, now seen corresponding path program 65 times [2021-05-22 02:24:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:15,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92399767] [2021-05-22 02:24:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:15,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:15,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92399767] [2021-05-22 02:24:15,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92399767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:15,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806719479] [2021-05-22 02:24:15,917 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 [2021-05-22 02:24:15,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:15,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:16,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806719479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:16,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:16,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:16,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031837831] [2021-05-22 02:24:16,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:16,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:16,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:16,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:16,043 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) [2021-05-22 02:24:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:16,268 INFO L93 Difference]: Finished difference Result 396 states and 1071 transitions. [2021-05-22 02:24:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:16,268 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 [2021-05-22 02:24:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:16,269 INFO L225 Difference]: With dead ends: 396 [2021-05-22 02:24:16,269 INFO L226 Difference]: Without dead ends: 373 [2021-05-22 02:24:16,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-22 02:24:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 214. [2021-05-22 02:24:16,273 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) [2021-05-22 02:24:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 624 transitions. [2021-05-22 02:24:16,273 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 624 transitions. Word has length 18 [2021-05-22 02:24:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:16,274 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 624 transitions. [2021-05-22 02:24:16,274 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) [2021-05-22 02:24:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 624 transitions. [2021-05-22 02:24:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:16,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:16,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:16,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-05-22 02:24:16,489 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:16,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1099390935, now seen corresponding path program 66 times [2021-05-22 02:24:16,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:16,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508828777] [2021-05-22 02:24:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:16,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508828777] [2021-05-22 02:24:16,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508828777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120070489] [2021-05-22 02:24:16,533 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 [2021-05-22 02:24:16,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:16,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:16,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120070489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:16,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:16,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:16,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771539331] [2021-05-22 02:24:16,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:16,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:16,631 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) [2021-05-22 02:24:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:16,843 INFO L93 Difference]: Finished difference Result 361 states and 998 transitions. [2021-05-22 02:24:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:16,843 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 [2021-05-22 02:24:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:16,844 INFO L225 Difference]: With dead ends: 361 [2021-05-22 02:24:16,844 INFO L226 Difference]: Without dead ends: 334 [2021-05-22 02:24:16,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-22 02:24:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 212. [2021-05-22 02:24:16,846 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) [2021-05-22 02:24:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-22 02:24:16,847 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-22 02:24:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:16,847 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-22 02:24:16,847 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) [2021-05-22 02:24:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-22 02:24:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:16,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:16,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:17,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:17,048 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:17,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1459644047, now seen corresponding path program 67 times [2021-05-22 02:24:17,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:17,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592719385] [2021-05-22 02:24:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:17,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:17,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592719385] [2021-05-22 02:24:17,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592719385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:17,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466370205] [2021-05-22 02:24:17,094 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 [2021-05-22 02:24:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:17,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:17,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466370205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:17,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:17,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:17,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829002615] [2021-05-22 02:24:17,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:17,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:17,192 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) [2021-05-22 02:24:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:17,386 INFO L93 Difference]: Finished difference Result 491 states and 1355 transitions. [2021-05-22 02:24:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:17,387 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 [2021-05-22 02:24:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:17,387 INFO L225 Difference]: With dead ends: 491 [2021-05-22 02:24:17,387 INFO L226 Difference]: Without dead ends: 472 [2021-05-22 02:24:17,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-22 02:24:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 218. [2021-05-22 02:24:17,390 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) [2021-05-22 02:24:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 638 transitions. [2021-05-22 02:24:17,391 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 638 transitions. Word has length 18 [2021-05-22 02:24:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:17,391 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 638 transitions. [2021-05-22 02:24:17,391 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) [2021-05-22 02:24:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 638 transitions. [2021-05-22 02:24:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:17,391 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:17,391 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:17,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:17,592 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:17,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1303812215, now seen corresponding path program 68 times [2021-05-22 02:24:17,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:17,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295956997] [2021-05-22 02:24:17,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:17,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:17,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295956997] [2021-05-22 02:24:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295956997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:17,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784047520] [2021-05-22 02:24:17,642 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 [2021-05-22 02:24:17,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:17,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:17,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:17,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784047520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:17,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:17,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:17,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526871834] [2021-05-22 02:24:17,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:17,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:17,739 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) [2021-05-22 02:24:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:17,927 INFO L93 Difference]: Finished difference Result 526 states and 1428 transitions. [2021-05-22 02:24:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:17,927 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 [2021-05-22 02:24:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:17,928 INFO L225 Difference]: With dead ends: 526 [2021-05-22 02:24:17,928 INFO L226 Difference]: Without dead ends: 507 [2021-05-22 02:24:17,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-22 02:24:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 222. [2021-05-22 02:24:17,932 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) [2021-05-22 02:24:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 654 transitions. [2021-05-22 02:24:17,933 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 654 transitions. Word has length 18 [2021-05-22 02:24:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:17,933 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 654 transitions. [2021-05-22 02:24:17,933 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) [2021-05-22 02:24:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 654 transitions. [2021-05-22 02:24:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:17,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:17,933 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:18,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:18,155 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2060993905, now seen corresponding path program 69 times [2021-05-22 02:24:18,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:18,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084800108] [2021-05-22 02:24:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:18,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:18,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084800108] [2021-05-22 02:24:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084800108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:18,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995851543] [2021-05-22 02:24:18,197 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 [2021-05-22 02:24:18,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:18,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:18,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995851543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:18,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:18,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:18,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359081608] [2021-05-22 02:24:18,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:18,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:18,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:18,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:18,306 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) [2021-05-22 02:24:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:18,509 INFO L93 Difference]: Finished difference Result 489 states and 1342 transitions. [2021-05-22 02:24:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:18,509 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 [2021-05-22 02:24:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:18,510 INFO L225 Difference]: With dead ends: 489 [2021-05-22 02:24:18,510 INFO L226 Difference]: Without dead ends: 466 [2021-05-22 02:24:18,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-22 02:24:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 222. [2021-05-22 02:24:18,512 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) [2021-05-22 02:24:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 650 transitions. [2021-05-22 02:24:18,513 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 650 transitions. Word has length 18 [2021-05-22 02:24:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:18,513 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 650 transitions. [2021-05-22 02:24:18,513 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) [2021-05-22 02:24:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 650 transitions. [2021-05-22 02:24:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:18,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:18,513 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:18,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:18,717 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1255509907, now seen corresponding path program 70 times [2021-05-22 02:24:18,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:18,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686963939] [2021-05-22 02:24:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:18,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:18,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686963939] [2021-05-22 02:24:18,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686963939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:18,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102121635] [2021-05-22 02:24:18,762 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 [2021-05-22 02:24:18,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:18,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:18,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102121635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:18,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:18,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:18,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442910762] [2021-05-22 02:24:18,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:18,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:18,854 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) [2021-05-22 02:24:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:19,009 INFO L93 Difference]: Finished difference Result 452 states and 1260 transitions. [2021-05-22 02:24:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:19,010 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 [2021-05-22 02:24:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:19,010 INFO L225 Difference]: With dead ends: 452 [2021-05-22 02:24:19,010 INFO L226 Difference]: Without dead ends: 433 [2021-05-22 02:24:19,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:24:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-22 02:24:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 217. [2021-05-22 02:24:19,013 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) [2021-05-22 02:24:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 637 transitions. [2021-05-22 02:24:19,014 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 637 transitions. Word has length 18 [2021-05-22 02:24:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:19,014 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 637 transitions. [2021-05-22 02:24:19,014 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) [2021-05-22 02:24:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 637 transitions. [2021-05-22 02:24:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:19,014 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:19,014 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:19,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:19,215 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1030444307, now seen corresponding path program 71 times [2021-05-22 02:24:19,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:19,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859317641] [2021-05-22 02:24:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:19,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:19,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859317641] [2021-05-22 02:24:19,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859317641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:19,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641572936] [2021-05-22 02:24:19,253 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 [2021-05-22 02:24:19,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:19,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:19,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:19,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641572936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:19,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:19,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:19,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564223763] [2021-05-22 02:24:19,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:19,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:19,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:19,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:19,347 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) [2021-05-22 02:24:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:19,481 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-05-22 02:24:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:19,481 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 [2021-05-22 02:24:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:19,481 INFO L225 Difference]: With dead ends: 433 [2021-05-22 02:24:19,482 INFO L226 Difference]: Without dead ends: 414 [2021-05-22 02:24:19,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-22 02:24:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 221. [2021-05-22 02:24:19,484 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) [2021-05-22 02:24:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 657 transitions. [2021-05-22 02:24:19,485 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 657 transitions. Word has length 18 [2021-05-22 02:24:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:19,485 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 657 transitions. [2021-05-22 02:24:19,485 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) [2021-05-22 02:24:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 657 transitions. [2021-05-22 02:24:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:19,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:19,485 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:19,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-05-22 02:24:19,686 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:19,686 INFO L82 PathProgramCache]: Analyzing trace with hash -668276081, now seen corresponding path program 72 times [2021-05-22 02:24:19,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:19,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170401923] [2021-05-22 02:24:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:19,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:19,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170401923] [2021-05-22 02:24:19,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170401923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:19,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005369118] [2021-05-22 02:24:19,722 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 [2021-05-22 02:24:19,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:19,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:19,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005369118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:19,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:19,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:24:19,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326747370] [2021-05-22 02:24:19,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:19,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:19,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:19,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:19,795 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) [2021-05-22 02:24:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:19,911 INFO L93 Difference]: Finished difference Result 404 states and 1161 transitions. [2021-05-22 02:24:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:19,912 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 [2021-05-22 02:24:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:19,912 INFO L225 Difference]: With dead ends: 404 [2021-05-22 02:24:19,912 INFO L226 Difference]: Without dead ends: 385 [2021-05-22 02:24:19,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-22 02:24:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 213. [2021-05-22 02:24:19,915 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) [2021-05-22 02:24:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 621 transitions. [2021-05-22 02:24:19,915 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 621 transitions. Word has length 18 [2021-05-22 02:24:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:19,915 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 621 transitions. [2021-05-22 02:24:19,915 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) [2021-05-22 02:24:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 621 transitions. [2021-05-22 02:24:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:19,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:19,915 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:20,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:20,116 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash -188192517, now seen corresponding path program 73 times [2021-05-22 02:24:20,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:20,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070852361] [2021-05-22 02:24:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:20,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070852361] [2021-05-22 02:24:20,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070852361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013921154] [2021-05-22 02:24:20,165 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 [2021-05-22 02:24:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:20,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013921154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:20,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:20,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-22 02:24:20,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135575363] [2021-05-22 02:24:20,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:20,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:20,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:20,267 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) [2021-05-22 02:24:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:20,443 INFO L93 Difference]: Finished difference Result 502 states and 1407 transitions. [2021-05-22 02:24:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:20,443 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 [2021-05-22 02:24:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:20,444 INFO L225 Difference]: With dead ends: 502 [2021-05-22 02:24:20,444 INFO L226 Difference]: Without dead ends: 483 [2021-05-22 02:24:20,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-05-22 02:24:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 219. [2021-05-22 02:24:20,447 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) [2021-05-22 02:24:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-05-22 02:24:20,447 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 18 [2021-05-22 02:24:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:20,447 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-05-22 02:24:20,447 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) [2021-05-22 02:24:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-05-22 02:24:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:20,448 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:20,448 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:20,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-05-22 02:24:20,651 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash 741968659, now seen corresponding path program 74 times [2021-05-22 02:24:20,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:20,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823957582] [2021-05-22 02:24:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:20,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823957582] [2021-05-22 02:24:20,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823957582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056862458] [2021-05-22 02:24:20,701 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 [2021-05-22 02:24:20,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:20,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:20,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:20,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056862458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:20,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:20,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-22 02:24:20,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805199777] [2021-05-22 02:24:20,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:20,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:20,802 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) [2021-05-22 02:24:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:20,963 INFO L93 Difference]: Finished difference Result 490 states and 1367 transitions. [2021-05-22 02:24:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:20,963 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 [2021-05-22 02:24:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:20,964 INFO L225 Difference]: With dead ends: 490 [2021-05-22 02:24:20,964 INFO L226 Difference]: Without dead ends: 467 [2021-05-22 02:24:20,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-22 02:24:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 221. [2021-05-22 02:24:20,967 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) [2021-05-22 02:24:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 649 transitions. [2021-05-22 02:24:20,967 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 649 transitions. Word has length 18 [2021-05-22 02:24:20,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:20,967 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 649 transitions. [2021-05-22 02:24:20,967 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) [2021-05-22 02:24:20,967 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 649 transitions. [2021-05-22 02:24:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:20,967 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:20,967 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:21,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:21,168 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash 82317175, now seen corresponding path program 75 times [2021-05-22 02:24:21,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:21,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448003335] [2021-05-22 02:24:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:21,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:21,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448003335] [2021-05-22 02:24:21,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448003335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:21,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195598317] [2021-05-22 02:24:21,220 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 [2021-05-22 02:24:21,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:21,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:21,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195598317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:21,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:21,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:24:21,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802053676] [2021-05-22 02:24:21,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:24:21,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:24:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:21,326 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) [2021-05-22 02:24:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:21,540 INFO L93 Difference]: Finished difference Result 505 states and 1410 transitions. [2021-05-22 02:24:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:21,541 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 [2021-05-22 02:24:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:21,541 INFO L225 Difference]: With dead ends: 505 [2021-05-22 02:24:21,541 INFO L226 Difference]: Without dead ends: 486 [2021-05-22 02:24:21,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:21,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-22 02:24:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 218. [2021-05-22 02:24:21,544 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) [2021-05-22 02:24:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 646 transitions. [2021-05-22 02:24:21,545 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 646 transitions. Word has length 18 [2021-05-22 02:24:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:21,545 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 646 transitions. [2021-05-22 02:24:21,545 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) [2021-05-22 02:24:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 646 transitions. [2021-05-22 02:24:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:21,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:21,545 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:21,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-05-22 02:24:21,746 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:21,746 INFO L82 PathProgramCache]: Analyzing trace with hash -98811273, now seen corresponding path program 76 times [2021-05-22 02:24:21,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:21,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563785464] [2021-05-22 02:24:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:21,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:21,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563785464] [2021-05-22 02:24:21,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563785464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:21,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740779525] [2021-05-22 02:24:21,801 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 [2021-05-22 02:24:21,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:21,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:21,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:21,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740779525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:21,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:21,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312848269] [2021-05-22 02:24:21,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:21,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:21,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:21,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:21,885 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) [2021-05-22 02:24:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:21,998 INFO L93 Difference]: Finished difference Result 486 states and 1381 transitions. [2021-05-22 02:24:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:21,998 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 [2021-05-22 02:24:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:21,999 INFO L225 Difference]: With dead ends: 486 [2021-05-22 02:24:21,999 INFO L226 Difference]: Without dead ends: 467 [2021-05-22 02:24:21,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-22 02:24:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 214. [2021-05-22 02:24:22,002 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) [2021-05-22 02:24:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 626 transitions. [2021-05-22 02:24:22,002 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 626 transitions. Word has length 18 [2021-05-22 02:24:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:22,002 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 626 transitions. [2021-05-22 02:24:22,002 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) [2021-05-22 02:24:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 626 transitions. [2021-05-22 02:24:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:22,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:22,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:22,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-05-22 02:24:22,203 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1980104049, now seen corresponding path program 77 times [2021-05-22 02:24:22,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:22,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346547674] [2021-05-22 02:24:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:22,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:22,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346547674] [2021-05-22 02:24:22,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346547674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:22,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83197542] [2021-05-22 02:24:22,249 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 [2021-05-22 02:24:22,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:22,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:22,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:22,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:22,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83197542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:22,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:22,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:22,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144870190] [2021-05-22 02:24:22,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:22,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:22,374 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) [2021-05-22 02:24:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:22,558 INFO L93 Difference]: Finished difference Result 443 states and 1246 transitions. [2021-05-22 02:24:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:22,559 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 [2021-05-22 02:24:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:22,559 INFO L225 Difference]: With dead ends: 443 [2021-05-22 02:24:22,559 INFO L226 Difference]: Without dead ends: 420 [2021-05-22 02:24:22,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-22 02:24:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 222. [2021-05-22 02:24:22,562 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) [2021-05-22 02:24:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 648 transitions. [2021-05-22 02:24:22,562 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 648 transitions. Word has length 18 [2021-05-22 02:24:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:22,564 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 648 transitions. [2021-05-22 02:24:22,564 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) [2021-05-22 02:24:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 648 transitions. [2021-05-22 02:24:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:22,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:22,565 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:22,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-05-22 02:24:22,787 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1001546605, now seen corresponding path program 78 times [2021-05-22 02:24:22,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:22,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736605052] [2021-05-22 02:24:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:22,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736605052] [2021-05-22 02:24:22,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736605052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476067464] [2021-05-22 02:24:22,826 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 [2021-05-22 02:24:22,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:22,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476067464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:22,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:22,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:22,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608114314] [2021-05-22 02:24:22,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:22,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:22,911 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) [2021-05-22 02:24:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:23,069 INFO L93 Difference]: Finished difference Result 427 states and 1216 transitions. [2021-05-22 02:24:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:23,070 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 [2021-05-22 02:24:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:23,070 INFO L225 Difference]: With dead ends: 427 [2021-05-22 02:24:23,071 INFO L226 Difference]: Without dead ends: 408 [2021-05-22 02:24:23,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-22 02:24:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 212. [2021-05-22 02:24:23,073 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) [2021-05-22 02:24:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-22 02:24:23,074 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-22 02:24:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:23,074 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-22 02:24:23,074 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) [2021-05-22 02:24:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-22 02:24:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:23,074 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:23,074 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:23,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-05-22 02:24:23,275 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2120551441, now seen corresponding path program 79 times [2021-05-22 02:24:23,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:23,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440748837] [2021-05-22 02:24:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:23,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440748837] [2021-05-22 02:24:23,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440748837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274978446] [2021-05-22 02:24:23,329 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 [2021-05-22 02:24:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:23,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274978446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:23,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:23,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-22 02:24:23,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024660917] [2021-05-22 02:24:23,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:23,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:23,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:23,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:23,429 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) [2021-05-22 02:24:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:23,644 INFO L93 Difference]: Finished difference Result 424 states and 1183 transitions. [2021-05-22 02:24:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:23,644 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 [2021-05-22 02:24:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:23,644 INFO L225 Difference]: With dead ends: 424 [2021-05-22 02:24:23,645 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:24:23,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:24:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:24:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 217. [2021-05-22 02:24:23,653 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) [2021-05-22 02:24:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 636 transitions. [2021-05-22 02:24:23,653 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 636 transitions. Word has length 18 [2021-05-22 02:24:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:23,653 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 636 transitions. [2021-05-22 02:24:23,653 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) [2021-05-22 02:24:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 636 transitions. [2021-05-22 02:24:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:23,654 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:23,654 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:23,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-22 02:24:23,854 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1190390265, now seen corresponding path program 80 times [2021-05-22 02:24:23,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:23,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465617818] [2021-05-22 02:24:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:23,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:23,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465617818] [2021-05-22 02:24:23,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465617818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:23,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058182864] [2021-05-22 02:24:23,900 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 [2021-05-22 02:24:23,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058182864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:23,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:23,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:23,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080520195] [2021-05-22 02:24:23,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:23,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:23,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:23,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:23,991 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) [2021-05-22 02:24:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:24,207 INFO L93 Difference]: Finished difference Result 428 states and 1183 transitions. [2021-05-22 02:24:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:24,208 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 [2021-05-22 02:24:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:24,208 INFO L225 Difference]: With dead ends: 428 [2021-05-22 02:24:24,208 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:24:24,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:24:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 215. [2021-05-22 02:24:24,211 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) [2021-05-22 02:24:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 629 transitions. [2021-05-22 02:24:24,211 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 629 transitions. Word has length 18 [2021-05-22 02:24:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:24,211 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 629 transitions. [2021-05-22 02:24:24,211 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) [2021-05-22 02:24:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 629 transitions. [2021-05-22 02:24:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:24,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:24,212 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:24,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:24,412 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2091884499, now seen corresponding path program 81 times [2021-05-22 02:24:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:24,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245434983] [2021-05-22 02:24:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:24,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:24,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245434983] [2021-05-22 02:24:24,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245434983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942553243] [2021-05-22 02:24:24,454 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 [2021-05-22 02:24:24,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:24,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:24,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:24,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942553243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:24,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:24:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411043268] [2021-05-22 02:24:24,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:24,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:24,534 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) [2021-05-22 02:24:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:24,739 INFO L93 Difference]: Finished difference Result 422 states and 1164 transitions. [2021-05-22 02:24:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:24,739 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 [2021-05-22 02:24:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:24,740 INFO L225 Difference]: With dead ends: 422 [2021-05-22 02:24:24,740 INFO L226 Difference]: Without dead ends: 395 [2021-05-22 02:24:24,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-22 02:24:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 213. [2021-05-22 02:24:24,743 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) [2021-05-22 02:24:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-05-22 02:24:24,743 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-05-22 02:24:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:24,743 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-05-22 02:24:24,743 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) [2021-05-22 02:24:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-05-22 02:24:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:24,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:24,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:24,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-22 02:24:24,944 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1036814989, now seen corresponding path program 82 times [2021-05-22 02:24:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:24,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387934349] [2021-05-22 02:24:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:24,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387934349] [2021-05-22 02:24:24,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387934349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037923545] [2021-05-22 02:24:24,995 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 [2021-05-22 02:24:25,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:25,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:25,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:25,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037923545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:25,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:25,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-22 02:24:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984464516] [2021-05-22 02:24:25,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:24:25,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:25,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:24:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:25,089 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) [2021-05-22 02:24:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:25,255 INFO L93 Difference]: Finished difference Result 441 states and 1207 transitions. [2021-05-22 02:24:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:25,255 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 [2021-05-22 02:24:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:25,256 INFO L225 Difference]: With dead ends: 441 [2021-05-22 02:24:25,256 INFO L226 Difference]: Without dead ends: 422 [2021-05-22 02:24:25,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-22 02:24:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 219. [2021-05-22 02:24:25,259 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) [2021-05-22 02:24:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 649 transitions. [2021-05-22 02:24:25,259 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 649 transitions. Word has length 18 [2021-05-22 02:24:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:25,259 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 649 transitions. [2021-05-22 02:24:25,259 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) [2021-05-22 02:24:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 649 transitions. [2021-05-22 02:24:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:25,259 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:25,259 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:25,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-05-22 02:24:25,460 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:25,460 INFO L82 PathProgramCache]: Analyzing trace with hash -106653813, now seen corresponding path program 83 times [2021-05-22 02:24:25,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:25,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578454689] [2021-05-22 02:24:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:25,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:25,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578454689] [2021-05-22 02:24:25,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578454689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:25,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689650517] [2021-05-22 02:24:25,504 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 [2021-05-22 02:24:25,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:25,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:25,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689650517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:25,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:25,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:25,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763770223] [2021-05-22 02:24:25,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:25,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:25,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:25,595 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) [2021-05-22 02:24:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:25,761 INFO L93 Difference]: Finished difference Result 445 states and 1207 transitions. [2021-05-22 02:24:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:25,761 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 [2021-05-22 02:24:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:25,761 INFO L225 Difference]: With dead ends: 445 [2021-05-22 02:24:25,761 INFO L226 Difference]: Without dead ends: 422 [2021-05-22 02:24:25,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-22 02:24:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 221. [2021-05-22 02:24:25,765 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) [2021-05-22 02:24:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 650 transitions. [2021-05-22 02:24:25,766 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 650 transitions. Word has length 18 [2021-05-22 02:24:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:25,766 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 650 transitions. [2021-05-22 02:24:25,766 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) [2021-05-22 02:24:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 650 transitions. [2021-05-22 02:24:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:25,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:25,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:25,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:25,989 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:25,989 INFO L82 PathProgramCache]: Analyzing trace with hash -766305297, now seen corresponding path program 84 times [2021-05-22 02:24:25,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:25,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068943435] [2021-05-22 02:24:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:26,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068943435] [2021-05-22 02:24:26,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068943435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722180097] [2021-05-22 02:24:26,036 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 [2021-05-22 02:24:26,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:26,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722180097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:26,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:26,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-22 02:24:26,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771363432] [2021-05-22 02:24:26,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:24:26,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:26,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:24:26,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:26,138 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) [2021-05-22 02:24:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:26,344 INFO L93 Difference]: Finished difference Result 414 states and 1142 transitions. [2021-05-22 02:24:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:26,344 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 [2021-05-22 02:24:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:26,345 INFO L225 Difference]: With dead ends: 414 [2021-05-22 02:24:26,345 INFO L226 Difference]: Without dead ends: 395 [2021-05-22 02:24:26,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-22 02:24:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 218. [2021-05-22 02:24:26,347 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) [2021-05-22 02:24:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 647 transitions. [2021-05-22 02:24:26,348 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 647 transitions. Word has length 18 [2021-05-22 02:24:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:26,348 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 647 transitions. [2021-05-22 02:24:26,348 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) [2021-05-22 02:24:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 647 transitions. [2021-05-22 02:24:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:26,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:26,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:26,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-05-22 02:24:26,549 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:26,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:26,549 INFO L82 PathProgramCache]: Analyzing trace with hash -947433745, now seen corresponding path program 85 times [2021-05-22 02:24:26,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:26,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381825719] [2021-05-22 02:24:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:26,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:26,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381825719] [2021-05-22 02:24:26,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381825719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:26,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975258210] [2021-05-22 02:24:26,585 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 [2021-05-22 02:24:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:26,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975258210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:26,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:26,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:26,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884746366] [2021-05-22 02:24:26,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:26,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:26,670 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) [2021-05-22 02:24:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:26,799 INFO L93 Difference]: Finished difference Result 386 states and 1091 transitions. [2021-05-22 02:24:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:26,799 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 [2021-05-22 02:24:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:26,800 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:24:26,800 INFO L226 Difference]: Without dead ends: 367 [2021-05-22 02:24:26,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-22 02:24:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 214. [2021-05-22 02:24:26,803 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) [2021-05-22 02:24:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 627 transitions. [2021-05-22 02:24:26,803 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 627 transitions. Word has length 18 [2021-05-22 02:24:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:26,803 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 627 transitions. [2021-05-22 02:24:26,803 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) [2021-05-22 02:24:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 627 transitions. [2021-05-22 02:24:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:26,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:26,803 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:27,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:27,004 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1466240775, now seen corresponding path program 86 times [2021-05-22 02:24:27,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:27,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526488433] [2021-05-22 02:24:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:27,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:27,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526488433] [2021-05-22 02:24:27,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526488433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:27,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761128917] [2021-05-22 02:24:27,042 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 [2021-05-22 02:24:27,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:27,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:27,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761128917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:27,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:27,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:24:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453720869] [2021-05-22 02:24:27,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:24:27,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:24:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:27,148 INFO L87 Difference]: Start difference. First operand 214 states and 627 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:27,372 INFO L93 Difference]: Finished difference Result 422 states and 1166 transitions. [2021-05-22 02:24:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:27,373 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 [2021-05-22 02:24:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:27,373 INFO L225 Difference]: With dead ends: 422 [2021-05-22 02:24:27,373 INFO L226 Difference]: Without dead ends: 399 [2021-05-22 02:24:27,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:24:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-22 02:24:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 222. [2021-05-22 02:24:27,376 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) [2021-05-22 02:24:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 649 transitions. [2021-05-22 02:24:27,376 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 649 transitions. Word has length 18 [2021-05-22 02:24:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:27,376 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 649 transitions. [2021-05-22 02:24:27,376 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) [2021-05-22 02:24:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 649 transitions. [2021-05-22 02:24:27,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:27,377 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:27,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:27,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:27,577 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1850169077, now seen corresponding path program 87 times [2021-05-22 02:24:27,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:27,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979419847] [2021-05-22 02:24:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:27,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979419847] [2021-05-22 02:24:27,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979419847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242392696] [2021-05-22 02:24:27,620 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 [2021-05-22 02:24:27,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:27,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:27,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:27,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242392696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:27,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:27,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:27,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991358119] [2021-05-22 02:24:27,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:27,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:27,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:27,709 INFO L87 Difference]: Start difference. First operand 222 states and 649 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:27,867 INFO L93 Difference]: Finished difference Result 406 states and 1136 transitions. [2021-05-22 02:24:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:27,868 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 [2021-05-22 02:24:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:27,868 INFO L225 Difference]: With dead ends: 406 [2021-05-22 02:24:27,868 INFO L226 Difference]: Without dead ends: 387 [2021-05-22 02:24:27,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-22 02:24:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 213. [2021-05-22 02:24:27,871 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) [2021-05-22 02:24:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-05-22 02:24:27,871 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-05-22 02:24:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:27,871 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-05-22 02:24:27,871 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) [2021-05-22 02:24:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-05-22 02:24:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:27,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:27,872 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:28,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-05-22 02:24:28,072 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash -687990825, now seen corresponding path program 88 times [2021-05-22 02:24:28,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:28,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625753015] [2021-05-22 02:24:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:28,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625753015] [2021-05-22 02:24:28,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625753015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254175332] [2021-05-22 02:24:28,111 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 [2021-05-22 02:24:28,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:28,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:28,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:28,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254175332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:28,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:28,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-22 02:24:28,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000104387] [2021-05-22 02:24:28,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:28,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:28,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:28,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:28,210 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) [2021-05-22 02:24:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:28,406 INFO L93 Difference]: Finished difference Result 366 states and 1018 transitions. [2021-05-22 02:24:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:28,406 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 [2021-05-22 02:24:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:28,407 INFO L225 Difference]: With dead ends: 366 [2021-05-22 02:24:28,407 INFO L226 Difference]: Without dead ends: 339 [2021-05-22 02:24:28,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:28,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-22 02:24:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 215. [2021-05-22 02:24:28,409 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) [2021-05-22 02:24:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 627 transitions. [2021-05-22 02:24:28,410 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 627 transitions. Word has length 18 [2021-05-22 02:24:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:28,410 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 627 transitions. [2021-05-22 02:24:28,410 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) [2021-05-22 02:24:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 627 transitions. [2021-05-22 02:24:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:28,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:28,410 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:28,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-05-22 02:24:28,611 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:28,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1068673581, now seen corresponding path program 89 times [2021-05-22 02:24:28,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:28,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781754130] [2021-05-22 02:24:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:28,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:28,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781754130] [2021-05-22 02:24:28,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781754130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:28,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679748829] [2021-05-22 02:24:28,657 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 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 [2021-05-22 02:24:28,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:28,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:28,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:28,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679748829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:28,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:28,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:28,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959200715] [2021-05-22 02:24:28,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:28,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:28,767 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) [2021-05-22 02:24:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:28,960 INFO L93 Difference]: Finished difference Result 358 states and 1000 transitions. [2021-05-22 02:24:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:28,961 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 [2021-05-22 02:24:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:28,961 INFO L225 Difference]: With dead ends: 358 [2021-05-22 02:24:28,961 INFO L226 Difference]: Without dead ends: 335 [2021-05-22 02:24:28,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-22 02:24:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 223. [2021-05-22 02:24:28,964 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) [2021-05-22 02:24:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 649 transitions. [2021-05-22 02:24:28,964 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 649 transitions. Word has length 18 [2021-05-22 02:24:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:28,964 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 649 transitions. [2021-05-22 02:24:28,964 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) [2021-05-22 02:24:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 649 transitions. [2021-05-22 02:24:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:28,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:28,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:29,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:29,165 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash -90116137, now seen corresponding path program 90 times [2021-05-22 02:24:29,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:29,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838974694] [2021-05-22 02:24:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838974694] [2021-05-22 02:24:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838974694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856536653] [2021-05-22 02:24:29,207 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 [2021-05-22 02:24:29,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:29,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:29,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:24:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:29,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856536653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:29,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:29,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:24:29,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591168000] [2021-05-22 02:24:29,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:29,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:29,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:29,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:29,318 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) [2021-05-22 02:24:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:29,537 INFO L93 Difference]: Finished difference Result 333 states and 948 transitions. [2021-05-22 02:24:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:24:29,537 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 [2021-05-22 02:24:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:29,537 INFO L225 Difference]: With dead ends: 333 [2021-05-22 02:24:29,537 INFO L226 Difference]: Without dead ends: 314 [2021-05-22 02:24:29,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-22 02:24:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-05-22 02:24:29,540 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) [2021-05-22 02:24:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-22 02:24:29,540 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-22 02:24:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:29,540 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-22 02:24:29,540 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) [2021-05-22 02:24:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-22 02:24:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:29,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:29,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:29,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-05-22 02:24:29,741 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1714954922, now seen corresponding path program 1 times [2021-05-22 02:24:29,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:29,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949602245] [2021-05-22 02:24:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:29,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949602245] [2021-05-22 02:24:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949602245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741297486] [2021-05-22 02:24:29,768 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 [2021-05-22 02:24:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:29,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:29,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741297486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:29,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:29,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:29,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873971174] [2021-05-22 02:24:29,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:29,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:29,836 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) [2021-05-22 02:24:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:29,910 INFO L93 Difference]: Finished difference Result 306 states and 874 transitions. [2021-05-22 02:24:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:29,911 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 [2021-05-22 02:24:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:29,911 INFO L225 Difference]: With dead ends: 306 [2021-05-22 02:24:29,911 INFO L226 Difference]: Without dead ends: 282 [2021-05-22 02:24:29,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-22 02:24:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 219. [2021-05-22 02:24:29,914 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) [2021-05-22 02:24:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 638 transitions. [2021-05-22 02:24:29,915 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 638 transitions. Word has length 19 [2021-05-22 02:24:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:29,915 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 638 transitions. [2021-05-22 02:24:29,915 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) [2021-05-22 02:24:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 638 transitions. [2021-05-22 02:24:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:29,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:29,915 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:30,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:30,116 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:30,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1799002545, now seen corresponding path program 1 times [2021-05-22 02:24:30,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:30,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557489557] [2021-05-22 02:24:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:30,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:30,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557489557] [2021-05-22 02:24:30,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557489557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:30,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898436516] [2021-05-22 02:24:30,145 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 [2021-05-22 02:24:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:30,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898436516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:30,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:30,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:30,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974697650] [2021-05-22 02:24:30,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:30,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:30,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:30,206 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) [2021-05-22 02:24:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:30,284 INFO L93 Difference]: Finished difference Result 359 states and 1037 transitions. [2021-05-22 02:24:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:30,284 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 [2021-05-22 02:24:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:30,285 INFO L225 Difference]: With dead ends: 359 [2021-05-22 02:24:30,285 INFO L226 Difference]: Without dead ends: 359 [2021-05-22 02:24:30,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-22 02:24:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 230. [2021-05-22 02:24:30,287 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) [2021-05-22 02:24:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 682 transitions. [2021-05-22 02:24:30,288 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 682 transitions. Word has length 19 [2021-05-22 02:24:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:30,288 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 682 transitions. [2021-05-22 02:24:30,288 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) [2021-05-22 02:24:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 682 transitions. [2021-05-22 02:24:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:30,289 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:30,289 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:30,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-05-22 02:24:30,505 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2143819529, now seen corresponding path program 2 times [2021-05-22 02:24:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:30,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15769005] [2021-05-22 02:24:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:30,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:30,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15769005] [2021-05-22 02:24:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15769005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:30,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554404449] [2021-05-22 02:24:30,531 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 [2021-05-22 02:24:30,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:30,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554404449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:30,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870382421] [2021-05-22 02:24:30,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:30,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:30,595 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) [2021-05-22 02:24:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:30,672 INFO L93 Difference]: Finished difference Result 371 states and 1061 transitions. [2021-05-22 02:24:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:30,672 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 [2021-05-22 02:24:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:30,672 INFO L225 Difference]: With dead ends: 371 [2021-05-22 02:24:30,672 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 02:24:30,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 02:24:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 246. [2021-05-22 02:24:30,675 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) [2021-05-22 02:24:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-22 02:24:30,675 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-22 02:24:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:30,675 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-22 02:24:30,675 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) [2021-05-22 02:24:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-22 02:24:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:30,676 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:30,676 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:30,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-05-22 02:24:30,876 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2111872576, now seen corresponding path program 2 times [2021-05-22 02:24:30,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:30,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849437995] [2021-05-22 02:24:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:30,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:30,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849437995] [2021-05-22 02:24:30,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849437995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:30,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343593435] [2021-05-22 02:24:30,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:24:30,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:30,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:30,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:30,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343593435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:30,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:30,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:30,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10905161] [2021-05-22 02:24:30,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:30,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:30,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:30,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:30,978 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) [2021-05-22 02:24:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:31,056 INFO L93 Difference]: Finished difference Result 360 states and 1044 transitions. [2021-05-22 02:24:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:31,056 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 [2021-05-22 02:24:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:31,056 INFO L225 Difference]: With dead ends: 360 [2021-05-22 02:24:31,057 INFO L226 Difference]: Without dead ends: 360 [2021-05-22 02:24:31,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-22 02:24:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 250. [2021-05-22 02:24:31,059 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) [2021-05-22 02:24:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 754 transitions. [2021-05-22 02:24:31,060 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 754 transitions. Word has length 19 [2021-05-22 02:24:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:31,060 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 754 transitions. [2021-05-22 02:24:31,060 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) [2021-05-22 02:24:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 754 transitions. [2021-05-22 02:24:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:31,060 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:31,060 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:31,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-05-22 02:24:31,261 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 311126640, now seen corresponding path program 3 times [2021-05-22 02:24:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:31,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613531176] [2021-05-22 02:24:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:31,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:31,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613531176] [2021-05-22 02:24:31,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613531176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:31,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557235529] [2021-05-22 02:24:31,287 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 [2021-05-22 02:24:31,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:31,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:31,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:31,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557235529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:31,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:31,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:31,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445408454] [2021-05-22 02:24:31,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:31,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:31,362 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) [2021-05-22 02:24:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:31,437 INFO L93 Difference]: Finished difference Result 330 states and 966 transitions. [2021-05-22 02:24:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:31,437 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 [2021-05-22 02:24:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:31,437 INFO L225 Difference]: With dead ends: 330 [2021-05-22 02:24:31,437 INFO L226 Difference]: Without dead ends: 321 [2021-05-22 02:24:31,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-22 02:24:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 250. [2021-05-22 02:24:31,440 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) [2021-05-22 02:24:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 750 transitions. [2021-05-22 02:24:31,440 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 750 transitions. Word has length 19 [2021-05-22 02:24:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:31,440 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 750 transitions. [2021-05-22 02:24:31,440 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) [2021-05-22 02:24:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 750 transitions. [2021-05-22 02:24:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:31,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:31,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:31,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-05-22 02:24:31,641 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1664534853, now seen corresponding path program 3 times [2021-05-22 02:24:31,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:31,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933483194] [2021-05-22 02:24:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:31,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:31,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933483194] [2021-05-22 02:24:31,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933483194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:31,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331486327] [2021-05-22 02:24:31,668 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 [2021-05-22 02:24:31,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:31,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:31,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:31,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:31,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331486327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:31,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:31,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:31,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277256996] [2021-05-22 02:24:31,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:31,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:31,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:31,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:31,732 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) [2021-05-22 02:24:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:31,816 INFO L93 Difference]: Finished difference Result 351 states and 1024 transitions. [2021-05-22 02:24:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:31,817 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 [2021-05-22 02:24:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:31,817 INFO L225 Difference]: With dead ends: 351 [2021-05-22 02:24:31,817 INFO L226 Difference]: Without dead ends: 351 [2021-05-22 02:24:31,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-22 02:24:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2021-05-22 02:24:31,820 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) [2021-05-22 02:24:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-05-22 02:24:31,820 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 19 [2021-05-22 02:24:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:31,820 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-05-22 02:24:31,820 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) [2021-05-22 02:24:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-05-22 02:24:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:31,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:31,821 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:32,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:32,021 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash -757034203, now seen corresponding path program 4 times [2021-05-22 02:24:32,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:32,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640206519] [2021-05-22 02:24:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640206519] [2021-05-22 02:24:32,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640206519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770705250] [2021-05-22 02:24:32,044 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 [2021-05-22 02:24:32,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770705250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:32,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:32,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892214444] [2021-05-22 02:24:32,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:32,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:32,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:32,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:32,123 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) [2021-05-22 02:24:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:32,200 INFO L93 Difference]: Finished difference Result 321 states and 937 transitions. [2021-05-22 02:24:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:32,200 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 [2021-05-22 02:24:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:32,200 INFO L225 Difference]: With dead ends: 321 [2021-05-22 02:24:32,200 INFO L226 Difference]: Without dead ends: 305 [2021-05-22 02:24:32,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-05-22 02:24:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 242. [2021-05-22 02:24:32,203 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) [2021-05-22 02:24:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 722 transitions. [2021-05-22 02:24:32,203 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 722 transitions. Word has length 19 [2021-05-22 02:24:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:32,203 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 722 transitions. [2021-05-22 02:24:32,203 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) [2021-05-22 02:24:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 722 transitions. [2021-05-22 02:24:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:32,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:32,204 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:32,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:32,404 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1495725994, now seen corresponding path program 4 times [2021-05-22 02:24:32,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:32,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319960636] [2021-05-22 02:24:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:32,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319960636] [2021-05-22 02:24:32,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319960636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728486203] [2021-05-22 02:24:32,437 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 [2021-05-22 02:24:32,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:32,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:32,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728486203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:32,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516887441] [2021-05-22 02:24:32,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:32,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:32,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:32,508 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) [2021-05-22 02:24:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:32,588 INFO L93 Difference]: Finished difference Result 379 states and 1110 transitions. [2021-05-22 02:24:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:32,588 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 [2021-05-22 02:24:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:32,589 INFO L225 Difference]: With dead ends: 379 [2021-05-22 02:24:32,589 INFO L226 Difference]: Without dead ends: 379 [2021-05-22 02:24:32,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-22 02:24:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 246. [2021-05-22 02:24:32,591 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) [2021-05-22 02:24:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-22 02:24:32,592 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-22 02:24:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:32,592 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-22 02:24:32,592 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) [2021-05-22 02:24:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-22 02:24:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:32,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:32,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:32,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-05-22 02:24:32,792 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:32,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1556074207, now seen corresponding path program 5 times [2021-05-22 02:24:32,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:32,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691080103] [2021-05-22 02:24:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:32,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691080103] [2021-05-22 02:24:32,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691080103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313097470] [2021-05-22 02:24:32,820 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 [2021-05-22 02:24:32,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:32,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:32,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313097470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:32,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:32,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497186013] [2021-05-22 02:24:32,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:32,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:32,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:32,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:32,901 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) [2021-05-22 02:24:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:32,974 INFO L93 Difference]: Finished difference Result 372 states and 1080 transitions. [2021-05-22 02:24:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:32,974 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 [2021-05-22 02:24:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:32,974 INFO L225 Difference]: With dead ends: 372 [2021-05-22 02:24:32,974 INFO L226 Difference]: Without dead ends: 364 [2021-05-22 02:24:32,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-22 02:24:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 262. [2021-05-22 02:24:32,977 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) [2021-05-22 02:24:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-05-22 02:24:32,977 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-05-22 02:24:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:32,977 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-05-22 02:24:32,978 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) [2021-05-22 02:24:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-05-22 02:24:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:32,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:32,978 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:33,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-22 02:24:33,179 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1524127254, now seen corresponding path program 5 times [2021-05-22 02:24:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:33,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019501830] [2021-05-22 02:24:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:33,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:33,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019501830] [2021-05-22 02:24:33,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019501830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:33,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126661024] [2021-05-22 02:24:33,204 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 [2021-05-22 02:24:33,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:33,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:33,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:33,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126661024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:33,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:33,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:33,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572011453] [2021-05-22 02:24:33,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:33,272 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) [2021-05-22 02:24:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:33,362 INFO L93 Difference]: Finished difference Result 408 states and 1192 transitions. [2021-05-22 02:24:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:33,363 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 [2021-05-22 02:24:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:33,363 INFO L225 Difference]: With dead ends: 408 [2021-05-22 02:24:33,363 INFO L226 Difference]: Without dead ends: 408 [2021-05-22 02:24:33,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-22 02:24:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 262. [2021-05-22 02:24:33,366 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) [2021-05-22 02:24:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-05-22 02:24:33,367 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-05-22 02:24:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:33,367 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-05-22 02:24:33,367 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) [2021-05-22 02:24:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-05-22 02:24:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:33,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:33,367 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:33,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-05-22 02:24:33,568 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash 898871962, now seen corresponding path program 6 times [2021-05-22 02:24:33,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:33,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987065776] [2021-05-22 02:24:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:33,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:33,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987065776] [2021-05-22 02:24:33,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987065776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:33,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178494407] [2021-05-22 02:24:33,591 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 [2021-05-22 02:24:33,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:33,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:33,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:33,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178494407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:33,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:33,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:33,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728088615] [2021-05-22 02:24:33,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:33,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:33,658 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) [2021-05-22 02:24:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:33,731 INFO L93 Difference]: Finished difference Result 354 states and 1042 transitions. [2021-05-22 02:24:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:33,732 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 [2021-05-22 02:24:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:33,732 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:24:33,732 INFO L226 Difference]: Without dead ends: 345 [2021-05-22 02:24:33,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-22 02:24:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 262. [2021-05-22 02:24:33,735 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) [2021-05-22 02:24:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 790 transitions. [2021-05-22 02:24:33,735 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 790 transitions. Word has length 19 [2021-05-22 02:24:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:33,735 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 790 transitions. [2021-05-22 02:24:33,735 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) [2021-05-22 02:24:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 790 transitions. [2021-05-22 02:24:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:33,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:33,736 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:33,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:33,936 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1076789531, now seen corresponding path program 6 times [2021-05-22 02:24:33,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:33,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901280884] [2021-05-22 02:24:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:33,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901280884] [2021-05-22 02:24:33,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901280884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221617980] [2021-05-22 02:24:33,966 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 [2021-05-22 02:24:33,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:33,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:33,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:33,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221617980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:34,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:34,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126892328] [2021-05-22 02:24:34,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:34,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:34,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:34,040 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) [2021-05-22 02:24:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:34,123 INFO L93 Difference]: Finished difference Result 326 states and 967 transitions. [2021-05-22 02:24:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:34,123 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 [2021-05-22 02:24:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:34,124 INFO L225 Difference]: With dead ends: 326 [2021-05-22 02:24:34,124 INFO L226 Difference]: Without dead ends: 326 [2021-05-22 02:24:34,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-22 02:24:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2021-05-22 02:24:34,127 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) [2021-05-22 02:24:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-22 02:24:34,128 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-22 02:24:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:34,128 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-22 02:24:34,128 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) [2021-05-22 02:24:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-22 02:24:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:34,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:34,128 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:34,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-05-22 02:24:34,347 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 132155580, now seen corresponding path program 7 times [2021-05-22 02:24:34,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:34,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877293892] [2021-05-22 02:24:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:34,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877293892] [2021-05-22 02:24:34,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877293892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989151101] [2021-05-22 02:24:34,371 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 [2021-05-22 02:24:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:34,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:34,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989151101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:34,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:34,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:34,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327814486] [2021-05-22 02:24:34,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:34,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:34,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:34,449 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) [2021-05-22 02:24:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:34,521 INFO L93 Difference]: Finished difference Result 492 states and 1411 transitions. [2021-05-22 02:24:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:34,521 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 [2021-05-22 02:24:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:34,522 INFO L225 Difference]: With dead ends: 492 [2021-05-22 02:24:34,522 INFO L226 Difference]: Without dead ends: 468 [2021-05-22 02:24:34,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-22 02:24:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-05-22 02:24:34,525 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) [2021-05-22 02:24:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 767 transitions. [2021-05-22 02:24:34,525 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 767 transitions. Word has length 19 [2021-05-22 02:24:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:34,525 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 767 transitions. [2021-05-22 02:24:34,525 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) [2021-05-22 02:24:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 767 transitions. [2021-05-22 02:24:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:34,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:34,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:34,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:34,726 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 48107957, now seen corresponding path program 7 times [2021-05-22 02:24:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:34,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036551999] [2021-05-22 02:24:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:34,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036551999] [2021-05-22 02:24:34,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036551999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077103276] [2021-05-22 02:24:34,752 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 [2021-05-22 02:24:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:34,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077103276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:34,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:34,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:34,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525537534] [2021-05-22 02:24:34,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:34,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:34,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:34,814 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) [2021-05-22 02:24:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:34,893 INFO L93 Difference]: Finished difference Result 608 states and 1788 transitions. [2021-05-22 02:24:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:34,893 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 [2021-05-22 02:24:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:34,894 INFO L225 Difference]: With dead ends: 608 [2021-05-22 02:24:34,894 INFO L226 Difference]: Without dead ends: 608 [2021-05-22 02:24:34,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-05-22 02:24:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 264. [2021-05-22 02:24:34,897 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) [2021-05-22 02:24:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 803 transitions. [2021-05-22 02:24:34,898 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 803 transitions. Word has length 19 [2021-05-22 02:24:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:34,898 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 803 transitions. [2021-05-22 02:24:34,898 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) [2021-05-22 02:24:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 803 transitions. [2021-05-22 02:24:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:34,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:34,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:35,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:35,113 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -296709027, now seen corresponding path program 8 times [2021-05-22 02:24:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304164302] [2021-05-22 02:24:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:35,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:35,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304164302] [2021-05-22 02:24:35,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304164302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:35,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834143705] [2021-05-22 02:24:35,137 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 [2021-05-22 02:24:35,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834143705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:35,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:35,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854276281] [2021-05-22 02:24:35,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:35,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:35,217 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) [2021-05-22 02:24:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:35,296 INFO L93 Difference]: Finished difference Result 554 states and 1618 transitions. [2021-05-22 02:24:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:35,297 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 [2021-05-22 02:24:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:35,297 INFO L225 Difference]: With dead ends: 554 [2021-05-22 02:24:35,297 INFO L226 Difference]: Without dead ends: 546 [2021-05-22 02:24:35,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-05-22 02:24:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 280. [2021-05-22 02:24:35,301 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) [2021-05-22 02:24:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-05-22 02:24:35,301 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-05-22 02:24:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:35,301 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-05-22 02:24:35,301 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) [2021-05-22 02:24:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-05-22 02:24:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:35,302 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:35,302 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:35,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:35,502 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:35,502 INFO L82 PathProgramCache]: Analyzing trace with hash -264762074, now seen corresponding path program 8 times [2021-05-22 02:24:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:35,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796693247] [2021-05-22 02:24:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:35,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:35,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796693247] [2021-05-22 02:24:35,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796693247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:35,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378722315] [2021-05-22 02:24:35,534 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 [2021-05-22 02:24:35,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378722315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:35,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:35,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:35,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776278493] [2021-05-22 02:24:35,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:35,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:35,616 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) [2021-05-22 02:24:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:35,721 INFO L93 Difference]: Finished difference Result 521 states and 1530 transitions. [2021-05-22 02:24:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:35,721 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 [2021-05-22 02:24:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:35,722 INFO L225 Difference]: With dead ends: 521 [2021-05-22 02:24:35,722 INFO L226 Difference]: Without dead ends: 521 [2021-05-22 02:24:35,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-22 02:24:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 280. [2021-05-22 02:24:35,727 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) [2021-05-22 02:24:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-05-22 02:24:35,727 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-05-22 02:24:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:35,728 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-05-22 02:24:35,728 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) [2021-05-22 02:24:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-05-22 02:24:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:35,728 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:35,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:35,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-05-22 02:24:35,929 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2136730154, now seen corresponding path program 9 times [2021-05-22 02:24:35,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:35,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974409463] [2021-05-22 02:24:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:35,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:35,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974409463] [2021-05-22 02:24:35,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974409463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:35,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385058523] [2021-05-22 02:24:35,957 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 [2021-05-22 02:24:35,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:35,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:35,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385058523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:36,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:36,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:36,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028681593] [2021-05-22 02:24:36,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:36,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:36,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:36,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:36,036 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) [2021-05-22 02:24:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:36,119 INFO L93 Difference]: Finished difference Result 518 states and 1507 transitions. [2021-05-22 02:24:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:36,120 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 [2021-05-22 02:24:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:36,120 INFO L225 Difference]: With dead ends: 518 [2021-05-22 02:24:36,120 INFO L226 Difference]: Without dead ends: 509 [2021-05-22 02:24:36,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-05-22 02:24:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 280. [2021-05-22 02:24:36,124 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) [2021-05-22 02:24:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 855 transitions. [2021-05-22 02:24:36,124 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 855 transitions. Word has length 19 [2021-05-22 02:24:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:36,124 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 855 transitions. [2021-05-22 02:24:36,124 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) [2021-05-22 02:24:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 855 transitions. [2021-05-22 02:24:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:36,125 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:36,125 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:36,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:36,325 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash 182575649, now seen corresponding path program 9 times [2021-05-22 02:24:36,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:36,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185652094] [2021-05-22 02:24:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:36,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185652094] [2021-05-22 02:24:36,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185652094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:36,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832722082] [2021-05-22 02:24:36,352 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 [2021-05-22 02:24:36,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:36,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832722082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:36,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:36,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:36,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185135354] [2021-05-22 02:24:36,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:36,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:36,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:36,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:36,416 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) [2021-05-22 02:24:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:36,491 INFO L93 Difference]: Finished difference Result 572 states and 1674 transitions. [2021-05-22 02:24:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:36,491 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 [2021-05-22 02:24:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:36,492 INFO L225 Difference]: With dead ends: 572 [2021-05-22 02:24:36,492 INFO L226 Difference]: Without dead ends: 572 [2021-05-22 02:24:36,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-05-22 02:24:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 269. [2021-05-22 02:24:36,495 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) [2021-05-22 02:24:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 822 transitions. [2021-05-22 02:24:36,496 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 822 transitions. Word has length 19 [2021-05-22 02:24:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:36,496 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 822 transitions. [2021-05-22 02:24:36,496 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) [2021-05-22 02:24:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 822 transitions. [2021-05-22 02:24:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:36,496 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:36,496 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:36,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:36,697 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash -12394796, now seen corresponding path program 10 times [2021-05-22 02:24:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:36,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14851930] [2021-05-22 02:24:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:36,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14851930] [2021-05-22 02:24:36,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14851930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:36,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:36,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:36,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758105948] [2021-05-22 02:24:36,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:36,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:36,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:36,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:36,721 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) [2021-05-22 02:24:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:36,804 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-05-22 02:24:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:36,804 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 [2021-05-22 02:24:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:36,805 INFO L225 Difference]: With dead ends: 413 [2021-05-22 02:24:36,805 INFO L226 Difference]: Without dead ends: 389 [2021-05-22 02:24:36,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-22 02:24:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 273. [2021-05-22 02:24:36,808 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) [2021-05-22 02:24:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 828 transitions. [2021-05-22 02:24:36,808 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 828 transitions. Word has length 19 [2021-05-22 02:24:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:36,808 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 828 transitions. [2021-05-22 02:24:36,808 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) [2021-05-22 02:24:36,808 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 828 transitions. [2021-05-22 02:24:36,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:36,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:36,809 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:36,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2021-05-22 02:24:36,809 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1941255398, now seen corresponding path program 11 times [2021-05-22 02:24:36,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:36,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251696071] [2021-05-22 02:24:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:36,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251696071] [2021-05-22 02:24:36,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251696071] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:36,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:36,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:36,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502850170] [2021-05-22 02:24:36,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:36,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:36,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:36,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:36,836 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) [2021-05-22 02:24:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:36,926 INFO L93 Difference]: Finished difference Result 397 states and 1148 transitions. [2021-05-22 02:24:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:36,926 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 [2021-05-22 02:24:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:36,926 INFO L225 Difference]: With dead ends: 397 [2021-05-22 02:24:36,926 INFO L226 Difference]: Without dead ends: 391 [2021-05-22 02:24:36,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-22 02:24:36,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2021-05-22 02:24:36,930 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) [2021-05-22 02:24:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 853 transitions. [2021-05-22 02:24:36,930 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 853 transitions. Word has length 19 [2021-05-22 02:24:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:36,930 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 853 transitions. [2021-05-22 02:24:36,930 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) [2021-05-22 02:24:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 853 transitions. [2021-05-22 02:24:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:36,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:36,931 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:36,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2021-05-22 02:24:36,931 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:36,931 INFO L82 PathProgramCache]: Analyzing trace with hash -449594866, now seen corresponding path program 12 times [2021-05-22 02:24:36,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:36,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131621446] [2021-05-22 02:24:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:36,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131621446] [2021-05-22 02:24:36,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131621446] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:36,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:36,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:36,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262552263] [2021-05-22 02:24:36,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:36,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:36,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:36,961 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) [2021-05-22 02:24:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:37,058 INFO L93 Difference]: Finished difference Result 361 states and 1065 transitions. [2021-05-22 02:24:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:37,058 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 [2021-05-22 02:24:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:37,059 INFO L225 Difference]: With dead ends: 361 [2021-05-22 02:24:37,059 INFO L226 Difference]: Without dead ends: 346 [2021-05-22 02:24:37,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-22 02:24:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2021-05-22 02:24:37,062 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) [2021-05-22 02:24:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 820 transitions. [2021-05-22 02:24:37,062 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 820 transitions. Word has length 19 [2021-05-22 02:24:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:37,062 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 820 transitions. [2021-05-22 02:24:37,062 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) [2021-05-22 02:24:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 820 transitions. [2021-05-22 02:24:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:37,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:37,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:37,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2021-05-22 02:24:37,063 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:37,063 INFO L82 PathProgramCache]: Analyzing trace with hash -405487539, now seen corresponding path program 10 times [2021-05-22 02:24:37,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:37,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119006080] [2021-05-22 02:24:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:37,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:37,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119006080] [2021-05-22 02:24:37,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119006080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:37,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176829434] [2021-05-22 02:24:37,093 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 [2021-05-22 02:24:37,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:37,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:37,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:37,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176829434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:37,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:37,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:37,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951790050] [2021-05-22 02:24:37,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:37,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:37,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:37,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:37,153 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) [2021-05-22 02:24:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:37,232 INFO L93 Difference]: Finished difference Result 531 states and 1547 transitions. [2021-05-22 02:24:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:37,232 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 [2021-05-22 02:24:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:37,233 INFO L225 Difference]: With dead ends: 531 [2021-05-22 02:24:37,233 INFO L226 Difference]: Without dead ends: 531 [2021-05-22 02:24:37,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-05-22 02:24:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 254. [2021-05-22 02:24:37,236 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) [2021-05-22 02:24:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 762 transitions. [2021-05-22 02:24:37,236 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 762 transitions. Word has length 19 [2021-05-22 02:24:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:37,236 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 762 transitions. [2021-05-22 02:24:37,236 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) [2021-05-22 02:24:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 762 transitions. [2021-05-22 02:24:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:37,237 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:37,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:37,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-05-22 02:24:37,437 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:37,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1305660447, now seen corresponding path program 11 times [2021-05-22 02:24:37,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:37,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360161667] [2021-05-22 02:24:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:37,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:37,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360161667] [2021-05-22 02:24:37,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360161667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:37,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287375778] [2021-05-22 02:24:37,461 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 [2021-05-22 02:24:37,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:37,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:37,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287375778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:37,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:37,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:37,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319119391] [2021-05-22 02:24:37,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:37,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:37,526 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) [2021-05-22 02:24:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:37,600 INFO L93 Difference]: Finished difference Result 470 states and 1356 transitions. [2021-05-22 02:24:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:37,600 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 [2021-05-22 02:24:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:37,601 INFO L225 Difference]: With dead ends: 470 [2021-05-22 02:24:37,601 INFO L226 Difference]: Without dead ends: 464 [2021-05-22 02:24:37,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-22 02:24:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 266. [2021-05-22 02:24:37,604 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) [2021-05-22 02:24:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 801 transitions. [2021-05-22 02:24:37,605 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 801 transitions. Word has length 19 [2021-05-22 02:24:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:37,605 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 801 transitions. [2021-05-22 02:24:37,605 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) [2021-05-22 02:24:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 801 transitions. [2021-05-22 02:24:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:37,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:37,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:37,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:37,806 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:37,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1773947229, now seen corresponding path program 12 times [2021-05-22 02:24:37,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:37,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898781247] [2021-05-22 02:24:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:37,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898781247] [2021-05-22 02:24:37,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898781247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046937527] [2021-05-22 02:24:37,832 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 [2021-05-22 02:24:37,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:37,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046937527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:37,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:37,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:37,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404541977] [2021-05-22 02:24:37,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:37,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:37,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:37,903 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) [2021-05-22 02:24:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:37,979 INFO L93 Difference]: Finished difference Result 448 states and 1309 transitions. [2021-05-22 02:24:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:37,979 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 [2021-05-22 02:24:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:37,980 INFO L225 Difference]: With dead ends: 448 [2021-05-22 02:24:37,980 INFO L226 Difference]: Without dead ends: 448 [2021-05-22 02:24:37,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-05-22 02:24:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 251. [2021-05-22 02:24:37,983 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) [2021-05-22 02:24:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 756 transitions. [2021-05-22 02:24:37,983 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 756 transitions. Word has length 19 [2021-05-22 02:24:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:37,983 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 756 transitions. [2021-05-22 02:24:37,983 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) [2021-05-22 02:24:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 756 transitions. [2021-05-22 02:24:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:37,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:37,984 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:38,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:38,193 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:38,193 INFO L82 PathProgramCache]: Analyzing trace with hash -964970507, now seen corresponding path program 13 times [2021-05-22 02:24:38,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:38,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274452119] [2021-05-22 02:24:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:38,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274452119] [2021-05-22 02:24:38,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274452119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:38,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:38,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:38,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043352761] [2021-05-22 02:24:38,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:38,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:38,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:38,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:38,218 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) [2021-05-22 02:24:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:38,289 INFO L93 Difference]: Finished difference Result 469 states and 1343 transitions. [2021-05-22 02:24:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:38,290 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 [2021-05-22 02:24:38,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:38,290 INFO L225 Difference]: With dead ends: 469 [2021-05-22 02:24:38,290 INFO L226 Difference]: Without dead ends: 461 [2021-05-22 02:24:38,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-22 02:24:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 271. [2021-05-22 02:24:38,294 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) [2021-05-22 02:24:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 822 transitions. [2021-05-22 02:24:38,294 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 822 transitions. Word has length 19 [2021-05-22 02:24:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:38,294 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 822 transitions. [2021-05-22 02:24:38,294 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) [2021-05-22 02:24:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 822 transitions. [2021-05-22 02:24:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:38,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:38,295 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:38,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2021-05-22 02:24:38,295 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash -584232867, now seen corresponding path program 14 times [2021-05-22 02:24:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:38,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611788419] [2021-05-22 02:24:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:38,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611788419] [2021-05-22 02:24:38,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611788419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:38,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:38,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:38,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508423500] [2021-05-22 02:24:38,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:38,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:38,325 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) [2021-05-22 02:24:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:38,393 INFO L93 Difference]: Finished difference Result 475 states and 1358 transitions. [2021-05-22 02:24:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:38,393 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 [2021-05-22 02:24:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:38,394 INFO L225 Difference]: With dead ends: 475 [2021-05-22 02:24:38,394 INFO L226 Difference]: Without dead ends: 467 [2021-05-22 02:24:38,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-22 02:24:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 275. [2021-05-22 02:24:38,397 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) [2021-05-22 02:24:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 831 transitions. [2021-05-22 02:24:38,397 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 831 transitions. Word has length 19 [2021-05-22 02:24:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:38,397 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 831 transitions. [2021-05-22 02:24:38,397 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) [2021-05-22 02:24:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 831 transitions. [2021-05-22 02:24:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:38,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:38,398 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:38,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2021-05-22 02:24:38,398 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash 967392422, now seen corresponding path program 13 times [2021-05-22 02:24:38,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:38,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494615628] [2021-05-22 02:24:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:38,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494615628] [2021-05-22 02:24:38,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494615628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:38,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551159780] [2021-05-22 02:24:38,428 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 [2021-05-22 02:24:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:38,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551159780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:38,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:38,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:38,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274812100] [2021-05-22 02:24:38,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:38,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:38,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:38,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:38,512 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) [2021-05-22 02:24:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:38,602 INFO L93 Difference]: Finished difference Result 493 states and 1439 transitions. [2021-05-22 02:24:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:24:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:38,603 INFO L225 Difference]: With dead ends: 493 [2021-05-22 02:24:38,603 INFO L226 Difference]: Without dead ends: 493 [2021-05-22 02:24:38,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-22 02:24:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 281. [2021-05-22 02:24:38,607 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) [2021-05-22 02:24:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 858 transitions. [2021-05-22 02:24:38,607 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 858 transitions. Word has length 19 [2021-05-22 02:24:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:38,607 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 858 transitions. [2021-05-22 02:24:38,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 858 transitions. [2021-05-22 02:24:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:38,608 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:38,608 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:38,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-05-22 02:24:38,808 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1897553598, now seen corresponding path program 14 times [2021-05-22 02:24:38,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:38,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103509351] [2021-05-22 02:24:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103509351] [2021-05-22 02:24:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103509351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314003864] [2021-05-22 02:24:38,840 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 [2021-05-22 02:24:38,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:38,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:38,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:38,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314003864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:38,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:38,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:38,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805669984] [2021-05-22 02:24:38,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:38,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:38,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:38,927 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) [2021-05-22 02:24:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:38,995 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-05-22 02:24:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:38,996 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 [2021-05-22 02:24:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:38,996 INFO L225 Difference]: With dead ends: 475 [2021-05-22 02:24:38,996 INFO L226 Difference]: Without dead ends: 469 [2021-05-22 02:24:38,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-22 02:24:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 281. [2021-05-22 02:24:39,000 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) [2021-05-22 02:24:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-05-22 02:24:39,000 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-05-22 02:24:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:39,000 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-05-22 02:24:39,000 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) [2021-05-22 02:24:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-05-22 02:24:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:39,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:39,001 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:39,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:39,201 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1169104647, now seen corresponding path program 15 times [2021-05-22 02:24:39,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:39,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976828656] [2021-05-22 02:24:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:39,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976828656] [2021-05-22 02:24:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976828656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688017696] [2021-05-22 02:24:39,232 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 [2021-05-22 02:24:39,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:39,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:39,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688017696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:39,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:39,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:39,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406658989] [2021-05-22 02:24:39,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:39,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:39,313 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) [2021-05-22 02:24:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:39,389 INFO L93 Difference]: Finished difference Result 494 states and 1409 transitions. [2021-05-22 02:24:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:39,389 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 [2021-05-22 02:24:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:39,389 INFO L225 Difference]: With dead ends: 494 [2021-05-22 02:24:39,389 INFO L226 Difference]: Without dead ends: 486 [2021-05-22 02:24:39,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-22 02:24:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 281. [2021-05-22 02:24:39,393 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) [2021-05-22 02:24:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-05-22 02:24:39,393 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-05-22 02:24:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:39,393 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-05-22 02:24:39,393 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) [2021-05-22 02:24:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-05-22 02:24:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:39,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:39,394 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:39,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-05-22 02:24:39,594 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1167792078, now seen corresponding path program 15 times [2021-05-22 02:24:39,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:39,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988139481] [2021-05-22 02:24:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:39,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:39,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988139481] [2021-05-22 02:24:39,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988139481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:39,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038279691] [2021-05-22 02:24:39,627 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 [2021-05-22 02:24:39,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:24:39,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:39,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:39,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:39,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038279691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:39,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:39,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:39,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042807086] [2021-05-22 02:24:39,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:39,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:39,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:39,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:39,710 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) [2021-05-22 02:24:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:39,805 INFO L93 Difference]: Finished difference Result 484 states and 1404 transitions. [2021-05-22 02:24:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:39,805 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 [2021-05-22 02:24:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:39,806 INFO L225 Difference]: With dead ends: 484 [2021-05-22 02:24:39,806 INFO L226 Difference]: Without dead ends: 484 [2021-05-22 02:24:39,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-22 02:24:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 272. [2021-05-22 02:24:39,809 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) [2021-05-22 02:24:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-05-22 02:24:39,809 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-05-22 02:24:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:39,810 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-05-22 02:24:39,810 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) [2021-05-22 02:24:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-05-22 02:24:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:39,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:39,810 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:40,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-05-22 02:24:40,010 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:40,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1086551406, now seen corresponding path program 16 times [2021-05-22 02:24:40,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:40,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606369546] [2021-05-22 02:24:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:40,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:40,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606369546] [2021-05-22 02:24:40,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606369546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:40,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352686297] [2021-05-22 02:24:40,044 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 [2021-05-22 02:24:40,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:40,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352686297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:40,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:40,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:40,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250263419] [2021-05-22 02:24:40,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:40,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:40,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:40,140 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) [2021-05-22 02:24:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:40,209 INFO L93 Difference]: Finished difference Result 439 states and 1276 transitions. [2021-05-22 02:24:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:40,209 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 [2021-05-22 02:24:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:40,210 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:24:40,210 INFO L226 Difference]: Without dead ends: 430 [2021-05-22 02:24:40,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-22 02:24:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 272. [2021-05-22 02:24:40,213 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) [2021-05-22 02:24:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-22 02:24:40,213 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-22 02:24:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:40,214 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-22 02:24:40,214 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) [2021-05-22 02:24:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-22 02:24:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:40,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:40,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:40,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-05-22 02:24:40,414 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:40,415 INFO L82 PathProgramCache]: Analyzing trace with hash -889110087, now seen corresponding path program 16 times [2021-05-22 02:24:40,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:40,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930752788] [2021-05-22 02:24:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:40,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:40,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930752788] [2021-05-22 02:24:40,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930752788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:40,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604835923] [2021-05-22 02:24:40,448 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 [2021-05-22 02:24:40,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:40,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:40,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604835923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:40,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:40,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:40,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012520449] [2021-05-22 02:24:40,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:40,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:40,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:40,551 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) [2021-05-22 02:24:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:40,634 INFO L93 Difference]: Finished difference Result 466 states and 1359 transitions. [2021-05-22 02:24:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:40,635 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 [2021-05-22 02:24:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:40,635 INFO L225 Difference]: With dead ends: 466 [2021-05-22 02:24:40,635 INFO L226 Difference]: Without dead ends: 466 [2021-05-22 02:24:40,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-22 02:24:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 268. [2021-05-22 02:24:40,638 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) [2021-05-22 02:24:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 814 transitions. [2021-05-22 02:24:40,638 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 814 transitions. Word has length 19 [2021-05-22 02:24:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:40,639 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 814 transitions. [2021-05-22 02:24:40,639 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) [2021-05-22 02:24:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 814 transitions. [2021-05-22 02:24:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:40,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:40,639 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:40,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:40,839 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:40,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:40,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1710395246, now seen corresponding path program 17 times [2021-05-22 02:24:40,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:40,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940088927] [2021-05-22 02:24:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:40,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:40,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940088927] [2021-05-22 02:24:40,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940088927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:40,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:40,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:40,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086270826] [2021-05-22 02:24:40,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:40,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:40,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:40,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:40,866 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) [2021-05-22 02:24:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:40,959 INFO L93 Difference]: Finished difference Result 410 states and 1187 transitions. [2021-05-22 02:24:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:40,960 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 [2021-05-22 02:24:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:40,960 INFO L225 Difference]: With dead ends: 410 [2021-05-22 02:24:40,960 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:24:40,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:24:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2021-05-22 02:24:40,963 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) [2021-05-22 02:24:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 839 transitions. [2021-05-22 02:24:40,963 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 839 transitions. Word has length 19 [2021-05-22 02:24:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:40,964 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 839 transitions. [2021-05-22 02:24:40,964 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) [2021-05-22 02:24:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 839 transitions. [2021-05-22 02:24:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:40,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:40,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:40,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2021-05-22 02:24:40,964 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash 608481094, now seen corresponding path program 18 times [2021-05-22 02:24:40,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:40,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303746136] [2021-05-22 02:24:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:40,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:40,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303746136] [2021-05-22 02:24:40,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303746136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:40,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:40,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:40,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027443939] [2021-05-22 02:24:40,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:40,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:40,994 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) [2021-05-22 02:24:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,078 INFO L93 Difference]: Finished difference Result 374 states and 1104 transitions. [2021-05-22 02:24:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:41,079 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 [2021-05-22 02:24:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,079 INFO L225 Difference]: With dead ends: 374 [2021-05-22 02:24:41,079 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 02:24:41,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 02:24:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 268. [2021-05-22 02:24:41,082 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) [2021-05-22 02:24:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 813 transitions. [2021-05-22 02:24:41,082 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 813 transitions. Word has length 19 [2021-05-22 02:24:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,082 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 813 transitions. [2021-05-22 02:24:41,083 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) [2021-05-22 02:24:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 813 transitions. [2021-05-22 02:24:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:41,083 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:41,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2021-05-22 02:24:41,083 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:41,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1860559839, now seen corresponding path program 17 times [2021-05-22 02:24:41,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:41,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651199971] [2021-05-22 02:24:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651199971] [2021-05-22 02:24:41,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651199971] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:41,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:41,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:41,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984522909] [2021-05-22 02:24:41,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:41,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:41,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:41,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:41,109 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) [2021-05-22 02:24:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,191 INFO L93 Difference]: Finished difference Result 435 states and 1255 transitions. [2021-05-22 02:24:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:41,191 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 [2021-05-22 02:24:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,191 INFO L225 Difference]: With dead ends: 435 [2021-05-22 02:24:41,192 INFO L226 Difference]: Without dead ends: 429 [2021-05-22 02:24:41,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-22 02:24:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 274. [2021-05-22 02:24:41,194 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) [2021-05-22 02:24:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 827 transitions. [2021-05-22 02:24:41,195 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 827 transitions. Word has length 19 [2021-05-22 02:24:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,195 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 827 transitions. [2021-05-22 02:24:41,195 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) [2021-05-22 02:24:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 827 transitions. [2021-05-22 02:24:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:41,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,195 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:41,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2021-05-22 02:24:41,195 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:41,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1590050147, now seen corresponding path program 18 times [2021-05-22 02:24:41,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:41,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891366880] [2021-05-22 02:24:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:41,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891366880] [2021-05-22 02:24:41,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891366880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:41,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:41,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:41,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441401637] [2021-05-22 02:24:41,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:41,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:41,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:41,224 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) [2021-05-22 02:24:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,303 INFO L93 Difference]: Finished difference Result 413 states and 1218 transitions. [2021-05-22 02:24:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:41,304 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 [2021-05-22 02:24:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,304 INFO L225 Difference]: With dead ends: 413 [2021-05-22 02:24:41,304 INFO L226 Difference]: Without dead ends: 413 [2021-05-22 02:24:41,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-22 02:24:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 253. [2021-05-22 02:24:41,307 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) [2021-05-22 02:24:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-05-22 02:24:41,307 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 19 [2021-05-22 02:24:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,307 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-05-22 02:24:41,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-05-22 02:24:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:41,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:41,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2021-05-22 02:24:41,308 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash 53973003, now seen corresponding path program 19 times [2021-05-22 02:24:41,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:41,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405723237] [2021-05-22 02:24:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:41,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405723237] [2021-05-22 02:24:41,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405723237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:41,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:41,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:41,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450821540] [2021-05-22 02:24:41,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:41,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:41,342 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) [2021-05-22 02:24:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,423 INFO L93 Difference]: Finished difference Result 398 states and 1147 transitions. [2021-05-22 02:24:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:41,423 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 [2021-05-22 02:24:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,424 INFO L225 Difference]: With dead ends: 398 [2021-05-22 02:24:41,424 INFO L226 Difference]: Without dead ends: 382 [2021-05-22 02:24:41,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-22 02:24:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 259. [2021-05-22 02:24:41,427 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) [2021-05-22 02:24:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 780 transitions. [2021-05-22 02:24:41,427 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 780 transitions. Word has length 19 [2021-05-22 02:24:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,427 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 780 transitions. [2021-05-22 02:24:41,427 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) [2021-05-22 02:24:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 780 transitions. [2021-05-22 02:24:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:41,428 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,428 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:41,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2021-05-22 02:24:41,428 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:41,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:41,428 INFO L82 PathProgramCache]: Analyzing trace with hash -481846493, now seen corresponding path program 20 times [2021-05-22 02:24:41,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:41,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616086208] [2021-05-22 02:24:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:41,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616086208] [2021-05-22 02:24:41,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616086208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:41,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:41,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:41,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956072537] [2021-05-22 02:24:41,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:41,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:41,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:41,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:41,454 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) [2021-05-22 02:24:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,547 INFO L93 Difference]: Finished difference Result 427 states and 1201 transitions. [2021-05-22 02:24:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:41,548 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 [2021-05-22 02:24:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,548 INFO L225 Difference]: With dead ends: 427 [2021-05-22 02:24:41,548 INFO L226 Difference]: Without dead ends: 419 [2021-05-22 02:24:41,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-22 02:24:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 275. [2021-05-22 02:24:41,551 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) [2021-05-22 02:24:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 824 transitions. [2021-05-22 02:24:41,551 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 824 transitions. Word has length 19 [2021-05-22 02:24:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,551 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 824 transitions. [2021-05-22 02:24:41,552 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) [2021-05-22 02:24:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 824 transitions. [2021-05-22 02:24:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:41,552 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,552 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:41,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2021-05-22 02:24:41,552 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:41,552 INFO L82 PathProgramCache]: Analyzing trace with hash -101108853, now seen corresponding path program 21 times [2021-05-22 02:24:41,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:41,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87172954] [2021-05-22 02:24:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:41,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87172954] [2021-05-22 02:24:41,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87172954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:41,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:41,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:41,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859516642] [2021-05-22 02:24:41,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:41,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:41,578 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) [2021-05-22 02:24:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,662 INFO L93 Difference]: Finished difference Result 390 states and 1115 transitions. [2021-05-22 02:24:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:41,662 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 [2021-05-22 02:24:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,662 INFO L225 Difference]: With dead ends: 390 [2021-05-22 02:24:41,662 INFO L226 Difference]: Without dead ends: 380 [2021-05-22 02:24:41,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-22 02:24:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 265. [2021-05-22 02:24:41,665 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) [2021-05-22 02:24:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 796 transitions. [2021-05-22 02:24:41,665 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 796 transitions. Word has length 19 [2021-05-22 02:24:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,665 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 796 transitions. [2021-05-22 02:24:41,666 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) [2021-05-22 02:24:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 796 transitions. [2021-05-22 02:24:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:41,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,666 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:41,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2021-05-22 02:24:41,666 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1901365676, now seen corresponding path program 19 times [2021-05-22 02:24:41,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:41,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92371306] [2021-05-22 02:24:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92371306] [2021-05-22 02:24:41,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92371306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961948801] [2021-05-22 02:24:41,691 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 [2021-05-22 02:24:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961948801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:41,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:41,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:41,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877933439] [2021-05-22 02:24:41,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:41,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:41,751 INFO L87 Difference]: Start difference. First operand 265 states and 796 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,822 INFO L93 Difference]: Finished difference Result 537 states and 1572 transitions. [2021-05-22 02:24:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:41,822 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 [2021-05-22 02:24:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,823 INFO L225 Difference]: With dead ends: 537 [2021-05-22 02:24:41,823 INFO L226 Difference]: Without dead ends: 537 [2021-05-22 02:24:41,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-22 02:24:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 271. [2021-05-22 02:24:41,826 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) [2021-05-22 02:24:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 817 transitions. [2021-05-22 02:24:41,826 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 817 transitions. Word has length 19 [2021-05-22 02:24:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,826 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 817 transitions. [2021-05-22 02:24:41,826 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) [2021-05-22 02:24:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 817 transitions. [2021-05-22 02:24:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:41,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,827 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:42,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-05-22 02:24:42,027 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2057197508, now seen corresponding path program 20 times [2021-05-22 02:24:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:42,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669041885] [2021-05-22 02:24:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:42,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669041885] [2021-05-22 02:24:42,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669041885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775297298] [2021-05-22 02:24:42,054 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 [2021-05-22 02:24:42,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:42,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775297298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:42,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:42,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590623980] [2021-05-22 02:24:42,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:42,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:42,126 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) [2021-05-22 02:24:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:42,209 INFO L93 Difference]: Finished difference Result 552 states and 1596 transitions. [2021-05-22 02:24:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:42,209 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 [2021-05-22 02:24:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:42,210 INFO L225 Difference]: With dead ends: 552 [2021-05-22 02:24:42,210 INFO L226 Difference]: Without dead ends: 552 [2021-05-22 02:24:42,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-05-22 02:24:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 277. [2021-05-22 02:24:42,213 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) [2021-05-22 02:24:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 844 transitions. [2021-05-22 02:24:42,214 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 844 transitions. Word has length 19 [2021-05-22 02:24:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:42,214 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 844 transitions. [2021-05-22 02:24:42,214 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) [2021-05-22 02:24:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 844 transitions. [2021-05-22 02:24:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:42,215 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:42,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:42,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:42,429 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1127036332, now seen corresponding path program 21 times [2021-05-22 02:24:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:42,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64377587] [2021-05-22 02:24:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64377587] [2021-05-22 02:24:42,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64377587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109624179] [2021-05-22 02:24:42,455 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 [2021-05-22 02:24:42,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:42,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109624179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:42,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:42,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233361263] [2021-05-22 02:24:42,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:42,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:42,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:42,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:42,525 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) [2021-05-22 02:24:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:42,620 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-05-22 02:24:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:42,621 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 [2021-05-22 02:24:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:42,621 INFO L225 Difference]: With dead ends: 498 [2021-05-22 02:24:42,621 INFO L226 Difference]: Without dead ends: 492 [2021-05-22 02:24:42,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-05-22 02:24:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 274. [2021-05-22 02:24:42,626 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) [2021-05-22 02:24:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 834 transitions. [2021-05-22 02:24:42,626 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 834 transitions. Word has length 19 [2021-05-22 02:24:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:42,626 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 834 transitions. [2021-05-22 02:24:42,626 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) [2021-05-22 02:24:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 834 transitions. [2021-05-22 02:24:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:42,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:42,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:42,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:42,828 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:42,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1979218041, now seen corresponding path program 22 times [2021-05-22 02:24:42,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:42,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606414227] [2021-05-22 02:24:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:42,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606414227] [2021-05-22 02:24:42,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606414227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43809530] [2021-05-22 02:24:42,854 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 [2021-05-22 02:24:42,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:42,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43809530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:42,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:42,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6072936] [2021-05-22 02:24:42,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:42,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:42,922 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) [2021-05-22 02:24:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:42,991 INFO L93 Difference]: Finished difference Result 476 states and 1382 transitions. [2021-05-22 02:24:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:42,991 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 [2021-05-22 02:24:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:42,992 INFO L225 Difference]: With dead ends: 476 [2021-05-22 02:24:42,992 INFO L226 Difference]: Without dead ends: 460 [2021-05-22 02:24:42,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-22 02:24:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 271. [2021-05-22 02:24:42,995 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) [2021-05-22 02:24:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-05-22 02:24:42,995 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-05-22 02:24:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:42,995 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-05-22 02:24:42,995 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) [2021-05-22 02:24:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-05-22 02:24:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:42,996 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:42,996 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:43,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:43,200 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash 16056364, now seen corresponding path program 22 times [2021-05-22 02:24:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:43,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196004980] [2021-05-22 02:24:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:43,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:43,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196004980] [2021-05-22 02:24:43,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196004980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:43,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793056490] [2021-05-22 02:24:43,227 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 [2021-05-22 02:24:43,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:43,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:43,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:43,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793056490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:43,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:43,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:43,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768029096] [2021-05-22 02:24:43,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:43,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:43,289 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) [2021-05-22 02:24:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:43,362 INFO L93 Difference]: Finished difference Result 539 states and 1596 transitions. [2021-05-22 02:24:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:43,362 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 [2021-05-22 02:24:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:43,363 INFO L225 Difference]: With dead ends: 539 [2021-05-22 02:24:43,363 INFO L226 Difference]: Without dead ends: 539 [2021-05-22 02:24:43,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-22 02:24:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 259. [2021-05-22 02:24:43,367 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) [2021-05-22 02:24:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 782 transitions. [2021-05-22 02:24:43,368 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 782 transitions. Word has length 19 [2021-05-22 02:24:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:43,368 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 782 transitions. [2021-05-22 02:24:43,368 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) [2021-05-22 02:24:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 782 transitions. [2021-05-22 02:24:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:43,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:43,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:43,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:43,585 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash -366317049, now seen corresponding path program 23 times [2021-05-22 02:24:43,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:43,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711044114] [2021-05-22 02:24:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:43,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:43,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711044114] [2021-05-22 02:24:43,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711044114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:43,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211432874] [2021-05-22 02:24:43,615 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 [2021-05-22 02:24:43,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:43,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:43,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211432874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:43,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:43,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:43,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066795345] [2021-05-22 02:24:43,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:43,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:43,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:43,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:43,698 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) [2021-05-22 02:24:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:43,773 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-05-22 02:24:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:43,773 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 [2021-05-22 02:24:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:43,774 INFO L225 Difference]: With dead ends: 482 [2021-05-22 02:24:43,774 INFO L226 Difference]: Without dead ends: 474 [2021-05-22 02:24:43,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-22 02:24:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 275. [2021-05-22 02:24:43,777 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) [2021-05-22 02:24:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-05-22 02:24:43,778 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-05-22 02:24:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:43,778 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-05-22 02:24:43,778 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) [2021-05-22 02:24:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-05-22 02:24:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:43,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:43,778 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:43,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-22 02:24:43,993 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash -334370096, now seen corresponding path program 23 times [2021-05-22 02:24:43,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:43,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639000649] [2021-05-22 02:24:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639000649] [2021-05-22 02:24:44,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639000649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250476036] [2021-05-22 02:24:44,020 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 [2021-05-22 02:24:44,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250476036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:44,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:44,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946990103] [2021-05-22 02:24:44,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:44,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:44,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:44,085 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) [2021-05-22 02:24:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:44,171 INFO L93 Difference]: Finished difference Result 532 states and 1566 transitions. [2021-05-22 02:24:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:44,171 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 [2021-05-22 02:24:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:44,172 INFO L225 Difference]: With dead ends: 532 [2021-05-22 02:24:44,172 INFO L226 Difference]: Without dead ends: 532 [2021-05-22 02:24:44,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-22 02:24:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 275. [2021-05-22 02:24:44,175 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) [2021-05-22 02:24:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-05-22 02:24:44,176 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-05-22 02:24:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:44,176 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-05-22 02:24:44,176 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) [2021-05-22 02:24:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-05-22 02:24:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:44,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:44,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:44,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:44,396 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2088629120, now seen corresponding path program 24 times [2021-05-22 02:24:44,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:44,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836966330] [2021-05-22 02:24:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:44,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836966330] [2021-05-22 02:24:44,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836966330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641470869] [2021-05-22 02:24:44,420 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 [2021-05-22 02:24:44,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:44,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641470869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:44,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124064030] [2021-05-22 02:24:44,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:44,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:44,487 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) [2021-05-22 02:24:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:44,558 INFO L93 Difference]: Finished difference Result 478 states and 1416 transitions. [2021-05-22 02:24:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:44,558 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 [2021-05-22 02:24:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:44,559 INFO L225 Difference]: With dead ends: 478 [2021-05-22 02:24:44,559 INFO L226 Difference]: Without dead ends: 469 [2021-05-22 02:24:44,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-22 02:24:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 275. [2021-05-22 02:24:44,562 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) [2021-05-22 02:24:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 834 transitions. [2021-05-22 02:24:44,563 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 834 transitions. Word has length 19 [2021-05-22 02:24:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:44,563 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 834 transitions. [2021-05-22 02:24:44,563 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) [2021-05-22 02:24:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 834 transitions. [2021-05-22 02:24:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:44,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:44,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:44,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:44,777 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash 112967627, now seen corresponding path program 24 times [2021-05-22 02:24:44,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:44,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645925699] [2021-05-22 02:24:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:44,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645925699] [2021-05-22 02:24:44,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645925699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947755182] [2021-05-22 02:24:44,807 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 [2021-05-22 02:24:44,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:44,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947755182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:44,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:44,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135250264] [2021-05-22 02:24:44,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:44,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:44,889 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) [2021-05-22 02:24:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:44,975 INFO L93 Difference]: Finished difference Result 445 states and 1322 transitions. [2021-05-22 02:24:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:44,976 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 [2021-05-22 02:24:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:44,976 INFO L225 Difference]: With dead ends: 445 [2021-05-22 02:24:44,976 INFO L226 Difference]: Without dead ends: 445 [2021-05-22 02:24:44,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-05-22 02:24:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 255. [2021-05-22 02:24:44,980 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) [2021-05-22 02:24:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-05-22 02:24:44,981 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-05-22 02:24:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:44,981 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-05-22 02:24:44,981 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) [2021-05-22 02:24:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-05-22 02:24:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:44,982 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:44,982 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:45,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-05-22 02:24:45,198 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:45,198 INFO L82 PathProgramCache]: Analyzing trace with hash 510647071, now seen corresponding path program 25 times [2021-05-22 02:24:45,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:45,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923875206] [2021-05-22 02:24:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:45,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:45,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923875206] [2021-05-22 02:24:45,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923875206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:45,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:45,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:45,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682531479] [2021-05-22 02:24:45,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:45,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:45,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:45,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:45,225 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) [2021-05-22 02:24:45,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:45,320 INFO L93 Difference]: Finished difference Result 454 states and 1310 transitions. [2021-05-22 02:24:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:45,320 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 [2021-05-22 02:24:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:45,320 INFO L225 Difference]: With dead ends: 454 [2021-05-22 02:24:45,320 INFO L226 Difference]: Without dead ends: 446 [2021-05-22 02:24:45,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-22 02:24:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 275. [2021-05-22 02:24:45,324 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) [2021-05-22 02:24:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-05-22 02:24:45,324 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-05-22 02:24:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:45,324 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-05-22 02:24:45,324 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) [2021-05-22 02:24:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-05-22 02:24:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:45,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:45,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:45,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2021-05-22 02:24:45,325 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash 891384711, now seen corresponding path program 26 times [2021-05-22 02:24:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:45,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270581010] [2021-05-22 02:24:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:45,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270581010] [2021-05-22 02:24:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270581010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:45,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:45,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:45,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520795246] [2021-05-22 02:24:45,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:45,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:45,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:45,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:45,351 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) [2021-05-22 02:24:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:45,445 INFO L93 Difference]: Finished difference Result 460 states and 1325 transitions. [2021-05-22 02:24:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:45,445 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 [2021-05-22 02:24:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:45,446 INFO L225 Difference]: With dead ends: 460 [2021-05-22 02:24:45,446 INFO L226 Difference]: Without dead ends: 452 [2021-05-22 02:24:45,446 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 [2021-05-22 02:24:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-22 02:24:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 279. [2021-05-22 02:24:45,449 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) [2021-05-22 02:24:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 845 transitions. [2021-05-22 02:24:45,449 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 845 transitions. Word has length 19 [2021-05-22 02:24:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:45,449 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 845 transitions. [2021-05-22 02:24:45,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 845 transitions. [2021-05-22 02:24:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:45,449 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:45,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:45,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2021-05-22 02:24:45,450 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1851957296, now seen corresponding path program 25 times [2021-05-22 02:24:45,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:45,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031210830] [2021-05-22 02:24:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:45,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:45,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031210830] [2021-05-22 02:24:45,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031210830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:45,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84122584] [2021-05-22 02:24:45,478 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 [2021-05-22 02:24:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:45,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:45,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:45,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84122584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:45,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:45,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:45,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714660029] [2021-05-22 02:24:45,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:45,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:45,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:45,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:45,568 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) [2021-05-22 02:24:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:45,674 INFO L93 Difference]: Finished difference Result 519 states and 1519 transitions. [2021-05-22 02:24:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:45,674 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 [2021-05-22 02:24:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:45,675 INFO L225 Difference]: With dead ends: 519 [2021-05-22 02:24:45,675 INFO L226 Difference]: Without dead ends: 519 [2021-05-22 02:24:45,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-05-22 02:24:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 285. [2021-05-22 02:24:45,680 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) [2021-05-22 02:24:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 872 transitions. [2021-05-22 02:24:45,681 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 872 transitions. Word has length 19 [2021-05-22 02:24:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:45,681 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 872 transitions. [2021-05-22 02:24:45,681 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) [2021-05-22 02:24:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 872 transitions. [2021-05-22 02:24:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:45,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:45,681 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:45,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:45,882 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -921796120, now seen corresponding path program 26 times [2021-05-22 02:24:45,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:45,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306949420] [2021-05-22 02:24:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:45,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:45,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306949420] [2021-05-22 02:24:45,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306949420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:45,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849600077] [2021-05-22 02:24:45,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:24:45,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:45,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:45,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:45,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849600077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:45,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:45,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:45,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035190602] [2021-05-22 02:24:45,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:45,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:45,984 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) [2021-05-22 02:24:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:46,051 INFO L93 Difference]: Finished difference Result 501 states and 1450 transitions. [2021-05-22 02:24:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:46,051 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 [2021-05-22 02:24:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:46,052 INFO L225 Difference]: With dead ends: 501 [2021-05-22 02:24:46,052 INFO L226 Difference]: Without dead ends: 495 [2021-05-22 02:24:46,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-22 02:24:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 284. [2021-05-22 02:24:46,055 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) [2021-05-22 02:24:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 867 transitions. [2021-05-22 02:24:46,056 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 867 transitions. Word has length 19 [2021-05-22 02:24:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:46,056 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 867 transitions. [2021-05-22 02:24:46,056 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) [2021-05-22 02:24:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 867 transitions. [2021-05-22 02:24:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:46,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:46,056 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:46,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-05-22 02:24:46,257 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash 306512931, now seen corresponding path program 27 times [2021-05-22 02:24:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:46,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176428219] [2021-05-22 02:24:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:46,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176428219] [2021-05-22 02:24:46,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176428219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:46,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196587327] [2021-05-22 02:24:46,284 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 [2021-05-22 02:24:46,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:46,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:46,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:46,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196587327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:46,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:46,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:46,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645071951] [2021-05-22 02:24:46,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:46,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:46,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:46,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:46,370 INFO L87 Difference]: Start difference. First operand 284 states and 867 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:46,478 INFO L93 Difference]: Finished difference Result 478 states and 1372 transitions. [2021-05-22 02:24:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:46,478 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 [2021-05-22 02:24:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:46,479 INFO L225 Difference]: With dead ends: 478 [2021-05-22 02:24:46,479 INFO L226 Difference]: Without dead ends: 470 [2021-05-22 02:24:46,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-22 02:24:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 284. [2021-05-22 02:24:46,482 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) [2021-05-22 02:24:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 870 transitions. [2021-05-22 02:24:46,483 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 870 transitions. Word has length 19 [2021-05-22 02:24:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:46,483 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 870 transitions. [2021-05-22 02:24:46,483 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) [2021-05-22 02:24:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 870 transitions. [2021-05-22 02:24:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:46,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:46,483 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:46,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:46,684 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1651557640, now seen corresponding path program 27 times [2021-05-22 02:24:46,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:46,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900643101] [2021-05-22 02:24:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:46,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900643101] [2021-05-22 02:24:46,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900643101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393756065] [2021-05-22 02:24:46,712 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 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 [2021-05-22 02:24:46,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:24:46,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:46,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393756065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:46,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:46,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:46,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618870766] [2021-05-22 02:24:46,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:46,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:46,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:46,786 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) [2021-05-22 02:24:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:46,860 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-05-22 02:24:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:46,861 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 [2021-05-22 02:24:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:46,861 INFO L225 Difference]: With dead ends: 498 [2021-05-22 02:24:46,861 INFO L226 Difference]: Without dead ends: 498 [2021-05-22 02:24:46,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-22 02:24:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 275. [2021-05-22 02:24:46,865 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) [2021-05-22 02:24:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 840 transitions. [2021-05-22 02:24:46,865 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 840 transitions. Word has length 19 [2021-05-22 02:24:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:46,865 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 840 transitions. [2021-05-22 02:24:46,865 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) [2021-05-22 02:24:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 840 transitions. [2021-05-22 02:24:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:46,866 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:46,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:47,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-05-22 02:24:47,066 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:47,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1732798312, now seen corresponding path program 28 times [2021-05-22 02:24:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:47,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062540779] [2021-05-22 02:24:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:47,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:47,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062540779] [2021-05-22 02:24:47,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062540779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:47,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359017575] [2021-05-22 02:24:47,091 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 [2021-05-22 02:24:47,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:47,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:47,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:47,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359017575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:47,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:47,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88393933] [2021-05-22 02:24:47,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:47,162 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) [2021-05-22 02:24:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:47,252 INFO L93 Difference]: Finished difference Result 453 states and 1315 transitions. [2021-05-22 02:24:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:47,252 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 [2021-05-22 02:24:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:47,253 INFO L225 Difference]: With dead ends: 453 [2021-05-22 02:24:47,253 INFO L226 Difference]: Without dead ends: 444 [2021-05-22 02:24:47,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-22 02:24:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 275. [2021-05-22 02:24:47,256 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) [2021-05-22 02:24:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-05-22 02:24:47,256 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-05-22 02:24:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:47,256 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-05-22 02:24:47,256 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) [2021-05-22 02:24:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-05-22 02:24:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:47,257 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:47,257 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:47,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:47,457 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 586507491, now seen corresponding path program 28 times [2021-05-22 02:24:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:47,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28332051] [2021-05-22 02:24:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:47,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:47,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28332051] [2021-05-22 02:24:47,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28332051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:47,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764232147] [2021-05-22 02:24:47,494 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 [2021-05-22 02:24:47,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:47,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:47,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764232147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:47,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:47,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:47,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559444965] [2021-05-22 02:24:47,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:47,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:47,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:47,575 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) [2021-05-22 02:24:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:47,671 INFO L93 Difference]: Finished difference Result 450 states and 1322 transitions. [2021-05-22 02:24:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:47,671 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 [2021-05-22 02:24:47,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:47,672 INFO L225 Difference]: With dead ends: 450 [2021-05-22 02:24:47,672 INFO L226 Difference]: Without dead ends: 450 [2021-05-22 02:24:47,672 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 [2021-05-22 02:24:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-22 02:24:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 271. [2021-05-22 02:24:47,675 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) [2021-05-22 02:24:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-05-22 02:24:47,675 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-05-22 02:24:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:47,675 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-05-22 02:24:47,675 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) [2021-05-22 02:24:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-05-22 02:24:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:47,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:47,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:47,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-05-22 02:24:47,876 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1108954472, now seen corresponding path program 29 times [2021-05-22 02:24:47,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:47,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789629668] [2021-05-22 02:24:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:47,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:47,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789629668] [2021-05-22 02:24:47,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789629668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:47,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:47,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:47,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149584305] [2021-05-22 02:24:47,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:47,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:47,901 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) [2021-05-22 02:24:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:47,972 INFO L93 Difference]: Finished difference Result 424 states and 1226 transitions. [2021-05-22 02:24:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:47,973 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 [2021-05-22 02:24:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:47,973 INFO L225 Difference]: With dead ends: 424 [2021-05-22 02:24:47,973 INFO L226 Difference]: Without dead ends: 418 [2021-05-22 02:24:47,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-22 02:24:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 281. [2021-05-22 02:24:47,976 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) [2021-05-22 02:24:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 849 transitions. [2021-05-22 02:24:47,977 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 849 transitions. Word has length 19 [2021-05-22 02:24:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:47,977 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 849 transitions. [2021-05-22 02:24:47,977 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) [2021-05-22 02:24:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 849 transitions. [2021-05-22 02:24:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:47,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:47,977 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:47,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2021-05-22 02:24:47,977 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:47,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:47,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2084098672, now seen corresponding path program 30 times [2021-05-22 02:24:47,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:47,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001334592] [2021-05-22 02:24:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:48,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001334592] [2021-05-22 02:24:48,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001334592] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:48,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:48,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:48,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535052241] [2021-05-22 02:24:48,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:48,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:48,002 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) [2021-05-22 02:24:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:48,071 INFO L93 Difference]: Finished difference Result 388 states and 1143 transitions. [2021-05-22 02:24:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:48,071 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 [2021-05-22 02:24:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:48,072 INFO L225 Difference]: With dead ends: 388 [2021-05-22 02:24:48,072 INFO L226 Difference]: Without dead ends: 377 [2021-05-22 02:24:48,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-22 02:24:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 271. [2021-05-22 02:24:48,074 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) [2021-05-22 02:24:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 823 transitions. [2021-05-22 02:24:48,075 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 823 transitions. Word has length 19 [2021-05-22 02:24:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:48,075 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 823 transitions. [2021-05-22 02:24:48,075 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) [2021-05-22 02:24:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 823 transitions. [2021-05-22 02:24:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:48,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:48,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:48,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2021-05-22 02:24:48,076 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash -384942261, now seen corresponding path program 29 times [2021-05-22 02:24:48,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:48,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712525138] [2021-05-22 02:24:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712525138] [2021-05-22 02:24:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712525138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:48,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:48,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509920604] [2021-05-22 02:24:48,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:48,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:48,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:48,108 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) [2021-05-22 02:24:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:48,205 INFO L93 Difference]: Finished difference Result 401 states and 1166 transitions. [2021-05-22 02:24:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:48,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:24:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:48,205 INFO L225 Difference]: With dead ends: 401 [2021-05-22 02:24:48,205 INFO L226 Difference]: Without dead ends: 395 [2021-05-22 02:24:48,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-22 02:24:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 277. [2021-05-22 02:24:48,208 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) [2021-05-22 02:24:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 837 transitions. [2021-05-22 02:24:48,209 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 837 transitions. Word has length 19 [2021-05-22 02:24:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:48,209 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 837 transitions. [2021-05-22 02:24:48,209 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) [2021-05-22 02:24:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 837 transitions. [2021-05-22 02:24:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:48,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:48,209 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:48,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2021-05-22 02:24:48,209 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash -114432569, now seen corresponding path program 30 times [2021-05-22 02:24:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:48,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579083278] [2021-05-22 02:24:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579083278] [2021-05-22 02:24:48,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579083278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:48,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:48,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:48,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125235900] [2021-05-22 02:24:48,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:48,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:48,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:48,240 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) [2021-05-22 02:24:48,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:48,340 INFO L93 Difference]: Finished difference Result 379 states and 1129 transitions. [2021-05-22 02:24:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:48,340 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 [2021-05-22 02:24:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:48,340 INFO L225 Difference]: With dead ends: 379 [2021-05-22 02:24:48,341 INFO L226 Difference]: Without dead ends: 379 [2021-05-22 02:24:48,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-22 02:24:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 255. [2021-05-22 02:24:48,343 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) [2021-05-22 02:24:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-05-22 02:24:48,343 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-05-22 02:24:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:48,344 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-05-22 02:24:48,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-05-22 02:24:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:48,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:48,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:48,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2021-05-22 02:24:48,344 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:48,344 INFO L82 PathProgramCache]: Analyzing trace with hash 401252280, now seen corresponding path program 31 times [2021-05-22 02:24:48,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:48,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071331558] [2021-05-22 02:24:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071331558] [2021-05-22 02:24:48,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071331558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265863650] [2021-05-22 02:24:48,369 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 [2021-05-22 02:24:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265863650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:48,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:48,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:48,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856208623] [2021-05-22 02:24:48,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:48,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:48,438 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) [2021-05-22 02:24:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:48,511 INFO L93 Difference]: Finished difference Result 485 states and 1377 transitions. [2021-05-22 02:24:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:48,511 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 [2021-05-22 02:24:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:48,512 INFO L225 Difference]: With dead ends: 485 [2021-05-22 02:24:48,512 INFO L226 Difference]: Without dead ends: 461 [2021-05-22 02:24:48,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:48,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-22 02:24:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 255. [2021-05-22 02:24:48,515 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) [2021-05-22 02:24:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-05-22 02:24:48,515 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-05-22 02:24:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:48,515 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-05-22 02:24:48,515 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) [2021-05-22 02:24:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-05-22 02:24:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:48,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:48,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:48,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:48,716 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash 317204657, now seen corresponding path program 31 times [2021-05-22 02:24:48,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:48,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662488377] [2021-05-22 02:24:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:48,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662488377] [2021-05-22 02:24:48,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662488377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:48,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372345942] [2021-05-22 02:24:48,741 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 [2021-05-22 02:24:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:48,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:48,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372345942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:48,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:48,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:48,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000369706] [2021-05-22 02:24:48,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:48,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:48,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:48,800 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) [2021-05-22 02:24:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:48,877 INFO L93 Difference]: Finished difference Result 428 states and 1251 transitions. [2021-05-22 02:24:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:48,877 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 [2021-05-22 02:24:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:48,878 INFO L225 Difference]: With dead ends: 428 [2021-05-22 02:24:48,878 INFO L226 Difference]: Without dead ends: 428 [2021-05-22 02:24:48,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-22 02:24:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 255. [2021-05-22 02:24:48,880 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) [2021-05-22 02:24:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-05-22 02:24:48,881 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-05-22 02:24:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:48,881 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-05-22 02:24:48,881 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) [2021-05-22 02:24:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-05-22 02:24:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:48,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:48,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:49,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-05-22 02:24:49,082 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash -27612327, now seen corresponding path program 32 times [2021-05-22 02:24:49,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:49,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116092074] [2021-05-22 02:24:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116092074] [2021-05-22 02:24:49,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116092074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128824914] [2021-05-22 02:24:49,106 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 [2021-05-22 02:24:49,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:49,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128824914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:49,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:49,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034841013] [2021-05-22 02:24:49,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:49,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:49,171 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) [2021-05-22 02:24:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:49,237 INFO L93 Difference]: Finished difference Result 425 states and 1238 transitions. [2021-05-22 02:24:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:49,238 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 [2021-05-22 02:24:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:49,238 INFO L225 Difference]: With dead ends: 425 [2021-05-22 02:24:49,238 INFO L226 Difference]: Without dead ends: 417 [2021-05-22 02:24:49,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-22 02:24:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 271. [2021-05-22 02:24:49,241 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) [2021-05-22 02:24:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-05-22 02:24:49,241 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-05-22 02:24:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:49,241 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-05-22 02:24:49,241 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) [2021-05-22 02:24:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-05-22 02:24:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:49,242 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:49,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:49,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-22 02:24:49,442 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash 4334626, now seen corresponding path program 32 times [2021-05-22 02:24:49,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:49,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838314535] [2021-05-22 02:24:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:49,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838314535] [2021-05-22 02:24:49,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838314535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553623117] [2021-05-22 02:24:49,472 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 [2021-05-22 02:24:49,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:49,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553623117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:49,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:49,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084672867] [2021-05-22 02:24:49,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:49,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:49,555 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) [2021-05-22 02:24:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:49,638 INFO L93 Difference]: Finished difference Result 489 states and 1412 transitions. [2021-05-22 02:24:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:49,638 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 [2021-05-22 02:24:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:49,639 INFO L225 Difference]: With dead ends: 489 [2021-05-22 02:24:49,639 INFO L226 Difference]: Without dead ends: 489 [2021-05-22 02:24:49,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-22 02:24:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-05-22 02:24:49,642 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) [2021-05-22 02:24:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-05-22 02:24:49,642 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-05-22 02:24:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:49,643 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-05-22 02:24:49,643 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) [2021-05-22 02:24:49,643 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-05-22 02:24:49,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:49,643 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:49,643 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:49,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:49,843 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1867633454, now seen corresponding path program 33 times [2021-05-22 02:24:49,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:49,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867713997] [2021-05-22 02:24:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:49,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867713997] [2021-05-22 02:24:49,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867713997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490564458] [2021-05-22 02:24:49,875 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 [2021-05-22 02:24:49,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:49,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:49,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490564458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:49,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:49,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595914636] [2021-05-22 02:24:49,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:49,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:49,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:49,968 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) [2021-05-22 02:24:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:50,049 INFO L93 Difference]: Finished difference Result 498 states and 1425 transitions. [2021-05-22 02:24:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:50,050 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 [2021-05-22 02:24:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:50,050 INFO L225 Difference]: With dead ends: 498 [2021-05-22 02:24:50,051 INFO L226 Difference]: Without dead ends: 489 [2021-05-22 02:24:50,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-22 02:24:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-05-22 02:24:50,054 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) [2021-05-22 02:24:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 815 transitions. [2021-05-22 02:24:50,054 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 815 transitions. Word has length 19 [2021-05-22 02:24:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:50,054 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 815 transitions. [2021-05-22 02:24:50,054 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) [2021-05-22 02:24:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 815 transitions. [2021-05-22 02:24:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:50,055 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:50,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:50,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-05-22 02:24:50,255 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash 451672349, now seen corresponding path program 33 times [2021-05-22 02:24:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:50,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370406084] [2021-05-22 02:24:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:50,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370406084] [2021-05-22 02:24:50,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370406084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:50,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234359601] [2021-05-22 02:24:50,282 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 [2021-05-22 02:24:50,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:50,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:50,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234359601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:50,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:50,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:50,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453003188] [2021-05-22 02:24:50,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:50,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:50,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:50,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:50,345 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) [2021-05-22 02:24:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:50,419 INFO L93 Difference]: Finished difference Result 447 states and 1310 transitions. [2021-05-22 02:24:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:50,419 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 [2021-05-22 02:24:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:50,419 INFO L225 Difference]: With dead ends: 447 [2021-05-22 02:24:50,420 INFO L226 Difference]: Without dead ends: 447 [2021-05-22 02:24:50,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-22 02:24:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 260. [2021-05-22 02:24:50,422 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) [2021-05-22 02:24:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 782 transitions. [2021-05-22 02:24:50,423 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 782 transitions. Word has length 19 [2021-05-22 02:24:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:50,423 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 782 transitions. [2021-05-22 02:24:50,423 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) [2021-05-22 02:24:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 782 transitions. [2021-05-22 02:24:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:50,423 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:50,423 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:50,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:50,624 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash 256701904, now seen corresponding path program 34 times [2021-05-22 02:24:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:50,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407525191] [2021-05-22 02:24:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:50,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407525191] [2021-05-22 02:24:50,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407525191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:50,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:50,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:50,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951996254] [2021-05-22 02:24:50,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:50,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:50,647 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) [2021-05-22 02:24:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:50,709 INFO L93 Difference]: Finished difference Result 556 states and 1559 transitions. [2021-05-22 02:24:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:50,709 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 [2021-05-22 02:24:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:50,710 INFO L225 Difference]: With dead ends: 556 [2021-05-22 02:24:50,710 INFO L226 Difference]: Without dead ends: 532 [2021-05-22 02:24:50,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-22 02:24:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 264. [2021-05-22 02:24:50,713 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) [2021-05-22 02:24:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-05-22 02:24:50,713 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 19 [2021-05-22 02:24:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:50,713 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-05-22 02:24:50,713 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) [2021-05-22 02:24:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-05-22 02:24:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:50,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:50,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:50,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2021-05-22 02:24:50,714 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2084615198, now seen corresponding path program 35 times [2021-05-22 02:24:50,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:50,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26486560] [2021-05-22 02:24:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26486560] [2021-05-22 02:24:50,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26486560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:50,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:50,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894972839] [2021-05-22 02:24:50,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:50,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:50,739 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) [2021-05-22 02:24:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:50,805 INFO L93 Difference]: Finished difference Result 540 states and 1513 transitions. [2021-05-22 02:24:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:50,805 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 [2021-05-22 02:24:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:50,806 INFO L225 Difference]: With dead ends: 540 [2021-05-22 02:24:50,806 INFO L226 Difference]: Without dead ends: 534 [2021-05-22 02:24:50,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-22 02:24:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 274. [2021-05-22 02:24:50,809 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) [2021-05-22 02:24:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 813 transitions. [2021-05-22 02:24:50,809 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 813 transitions. Word has length 19 [2021-05-22 02:24:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:50,809 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 813 transitions. [2021-05-22 02:24:50,809 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) [2021-05-22 02:24:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 813 transitions. [2021-05-22 02:24:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:50,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:50,810 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:50,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2021-05-22 02:24:50,810 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash -180498166, now seen corresponding path program 36 times [2021-05-22 02:24:50,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:50,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343878271] [2021-05-22 02:24:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343878271] [2021-05-22 02:24:50,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343878271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:50,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:50,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:50,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184265529] [2021-05-22 02:24:50,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:50,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:50,836 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) [2021-05-22 02:24:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:50,905 INFO L93 Difference]: Finished difference Result 504 states and 1430 transitions. [2021-05-22 02:24:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:50,905 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 [2021-05-22 02:24:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:50,906 INFO L225 Difference]: With dead ends: 504 [2021-05-22 02:24:50,906 INFO L226 Difference]: Without dead ends: 489 [2021-05-22 02:24:50,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:50,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-22 02:24:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 260. [2021-05-22 02:24:50,909 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) [2021-05-22 02:24:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-05-22 02:24:50,909 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-05-22 02:24:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:50,910 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-05-22 02:24:50,910 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) [2021-05-22 02:24:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-05-22 02:24:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:50,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:50,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:50,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2021-05-22 02:24:50,910 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:50,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash -136390839, now seen corresponding path program 34 times [2021-05-22 02:24:50,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:50,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812009298] [2021-05-22 02:24:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:50,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812009298] [2021-05-22 02:24:50,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812009298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:50,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055802508] [2021-05-22 02:24:50,936 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 [2021-05-22 02:24:50,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:50,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:50,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:51,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055802508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:51,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:51,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:51,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837549276] [2021-05-22 02:24:51,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:51,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:51,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:51,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:51,011 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) [2021-05-22 02:24:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:51,092 INFO L93 Difference]: Finished difference Result 588 states and 1723 transitions. [2021-05-22 02:24:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:51,092 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 [2021-05-22 02:24:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:51,093 INFO L225 Difference]: With dead ends: 588 [2021-05-22 02:24:51,093 INFO L226 Difference]: Without dead ends: 588 [2021-05-22 02:24:51,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-22 02:24:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 266. [2021-05-22 02:24:51,096 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) [2021-05-22 02:24:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 798 transitions. [2021-05-22 02:24:51,097 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 798 transitions. Word has length 19 [2021-05-22 02:24:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:51,097 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 798 transitions. [2021-05-22 02:24:51,097 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) [2021-05-22 02:24:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 798 transitions. [2021-05-22 02:24:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:51,097 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:51,097 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:51,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-05-22 02:24:51,298 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1036563747, now seen corresponding path program 35 times [2021-05-22 02:24:51,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:51,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629682834] [2021-05-22 02:24:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:51,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:51,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629682834] [2021-05-22 02:24:51,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629682834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:51,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722912558] [2021-05-22 02:24:51,321 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 [2021-05-22 02:24:51,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:51,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:51,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722912558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:51,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:51,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:51,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331035595] [2021-05-22 02:24:51,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:51,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:51,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:51,386 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) [2021-05-22 02:24:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:51,456 INFO L93 Difference]: Finished difference Result 527 states and 1532 transitions. [2021-05-22 02:24:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:51,456 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 [2021-05-22 02:24:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:51,457 INFO L225 Difference]: With dead ends: 527 [2021-05-22 02:24:51,457 INFO L226 Difference]: Without dead ends: 521 [2021-05-22 02:24:51,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-22 02:24:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 278. [2021-05-22 02:24:51,461 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) [2021-05-22 02:24:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 837 transitions. [2021-05-22 02:24:51,461 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 837 transitions. Word has length 19 [2021-05-22 02:24:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:51,461 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 837 transitions. [2021-05-22 02:24:51,461 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) [2021-05-22 02:24:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 837 transitions. [2021-05-22 02:24:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:51,462 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:51,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:51,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-05-22 02:24:51,678 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2043043929, now seen corresponding path program 36 times [2021-05-22 02:24:51,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:51,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759912586] [2021-05-22 02:24:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:51,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:51,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759912586] [2021-05-22 02:24:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759912586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:51,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655503146] [2021-05-22 02:24:51,713 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 [2021-05-22 02:24:51,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:51,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:51,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:51,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655503146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:51,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:51,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:51,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027083379] [2021-05-22 02:24:51,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:51,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:51,785 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) [2021-05-22 02:24:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:51,859 INFO L93 Difference]: Finished difference Result 505 states and 1485 transitions. [2021-05-22 02:24:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:51,860 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 [2021-05-22 02:24:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:51,860 INFO L225 Difference]: With dead ends: 505 [2021-05-22 02:24:51,860 INFO L226 Difference]: Without dead ends: 505 [2021-05-22 02:24:51,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-22 02:24:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-05-22 02:24:51,863 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) [2021-05-22 02:24:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-05-22 02:24:51,864 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-05-22 02:24:51,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:51,864 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-05-22 02:24:51,864 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) [2021-05-22 02:24:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-05-22 02:24:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:51,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:51,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:52,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-05-22 02:24:52,065 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:52,065 INFO L82 PathProgramCache]: Analyzing trace with hash -695873807, now seen corresponding path program 37 times [2021-05-22 02:24:52,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:52,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24487849] [2021-05-22 02:24:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:52,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:52,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24487849] [2021-05-22 02:24:52,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24487849] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:52,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:52,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275194770] [2021-05-22 02:24:52,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:52,089 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) [2021-05-22 02:24:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:52,162 INFO L93 Difference]: Finished difference Result 507 states and 1464 transitions. [2021-05-22 02:24:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:52,162 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 [2021-05-22 02:24:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:52,163 INFO L225 Difference]: With dead ends: 507 [2021-05-22 02:24:52,163 INFO L226 Difference]: Without dead ends: 499 [2021-05-22 02:24:52,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-05-22 02:24:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 272. [2021-05-22 02:24:52,166 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) [2021-05-22 02:24:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-22 02:24:52,167 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-22 02:24:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:52,167 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-22 02:24:52,167 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) [2021-05-22 02:24:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-22 02:24:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:52,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:52,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:52,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2021-05-22 02:24:52,167 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash -315136167, now seen corresponding path program 38 times [2021-05-22 02:24:52,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:52,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800847883] [2021-05-22 02:24:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:52,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:52,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800847883] [2021-05-22 02:24:52,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800847883] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:52,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:52,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:52,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073790317] [2021-05-22 02:24:52,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:52,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:52,198 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) [2021-05-22 02:24:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:52,270 INFO L93 Difference]: Finished difference Result 497 states and 1439 transitions. [2021-05-22 02:24:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:52,271 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 [2021-05-22 02:24:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:52,271 INFO L225 Difference]: With dead ends: 497 [2021-05-22 02:24:52,271 INFO L226 Difference]: Without dead ends: 489 [2021-05-22 02:24:52,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-22 02:24:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 276. [2021-05-22 02:24:52,274 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) [2021-05-22 02:24:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-05-22 02:24:52,275 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-05-22 02:24:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:52,275 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-05-22 02:24:52,275 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) [2021-05-22 02:24:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-05-22 02:24:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:52,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:52,275 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:52,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2021-05-22 02:24:52,276 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1236489122, now seen corresponding path program 37 times [2021-05-22 02:24:52,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:52,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237606181] [2021-05-22 02:24:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:52,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:52,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237606181] [2021-05-22 02:24:52,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237606181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:52,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085589247] [2021-05-22 02:24:52,306 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 [2021-05-22 02:24:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:52,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085589247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:52,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:52,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:52,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39301802] [2021-05-22 02:24:52,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:52,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:52,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:52,388 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) [2021-05-22 02:24:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:52,472 INFO L93 Difference]: Finished difference Result 591 states and 1709 transitions. [2021-05-22 02:24:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:52,473 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 [2021-05-22 02:24:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:52,473 INFO L225 Difference]: With dead ends: 591 [2021-05-22 02:24:52,473 INFO L226 Difference]: Without dead ends: 591 [2021-05-22 02:24:52,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-22 02:24:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 282. [2021-05-22 02:24:52,477 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) [2021-05-22 02:24:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 862 transitions. [2021-05-22 02:24:52,477 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 862 transitions. Word has length 19 [2021-05-22 02:24:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:52,477 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 862 transitions. [2021-05-22 02:24:52,477 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) [2021-05-22 02:24:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 862 transitions. [2021-05-22 02:24:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:52,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:52,478 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:52,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-05-22 02:24:52,693 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:52,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2128316998, now seen corresponding path program 38 times [2021-05-22 02:24:52,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:52,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554598261] [2021-05-22 02:24:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:52,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:52,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554598261] [2021-05-22 02:24:52,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554598261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:52,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291125838] [2021-05-22 02:24:52,720 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 [2021-05-22 02:24:52,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:52,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:52,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:52,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:52,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291125838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:52,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:52,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:52,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508115827] [2021-05-22 02:24:52,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:52,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:52,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:52,800 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) [2021-05-22 02:24:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:52,885 INFO L93 Difference]: Finished difference Result 573 states and 1640 transitions. [2021-05-22 02:24:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:52,885 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 [2021-05-22 02:24:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:52,886 INFO L225 Difference]: With dead ends: 573 [2021-05-22 02:24:52,886 INFO L226 Difference]: Without dead ends: 567 [2021-05-22 02:24:52,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-22 02:24:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 281. [2021-05-22 02:24:52,889 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) [2021-05-22 02:24:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-05-22 02:24:52,890 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-05-22 02:24:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:52,890 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-05-22 02:24:52,890 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) [2021-05-22 02:24:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-05-22 02:24:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:52,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:52,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:53,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:53,112 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash -900007947, now seen corresponding path program 39 times [2021-05-22 02:24:53,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:53,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987328335] [2021-05-22 02:24:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987328335] [2021-05-22 02:24:53,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987328335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766867321] [2021-05-22 02:24:53,137 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 [2021-05-22 02:24:53,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:53,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766867321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:53,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:53,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:53,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537532715] [2021-05-22 02:24:53,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:53,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:53,215 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) [2021-05-22 02:24:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:53,284 INFO L93 Difference]: Finished difference Result 558 states and 1599 transitions. [2021-05-22 02:24:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:53,285 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 [2021-05-22 02:24:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:53,285 INFO L225 Difference]: With dead ends: 558 [2021-05-22 02:24:53,285 INFO L226 Difference]: Without dead ends: 550 [2021-05-22 02:24:53,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-22 02:24:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 281. [2021-05-22 02:24:53,289 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) [2021-05-22 02:24:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-05-22 02:24:53,290 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-05-22 02:24:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:53,290 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-05-22 02:24:53,290 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) [2021-05-22 02:24:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-05-22 02:24:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:53,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:53,291 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:53,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:53,497 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1436888778, now seen corresponding path program 39 times [2021-05-22 02:24:53,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:53,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825714201] [2021-05-22 02:24:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:53,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825714201] [2021-05-22 02:24:53,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825714201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:53,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500117343] [2021-05-22 02:24:53,528 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 [2021-05-22 02:24:53,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:24:53,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:53,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:53,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500117343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:53,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:53,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:53,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945740137] [2021-05-22 02:24:53,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:53,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:53,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:53,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:53,616 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) [2021-05-22 02:24:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:53,702 INFO L93 Difference]: Finished difference Result 621 states and 1765 transitions. [2021-05-22 02:24:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:53,703 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 [2021-05-22 02:24:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:53,703 INFO L225 Difference]: With dead ends: 621 [2021-05-22 02:24:53,703 INFO L226 Difference]: Without dead ends: 621 [2021-05-22 02:24:53,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-05-22 02:24:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 272. [2021-05-22 02:24:53,707 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) [2021-05-22 02:24:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-05-22 02:24:53,707 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-05-22 02:24:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:53,707 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-05-22 02:24:53,707 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) [2021-05-22 02:24:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-05-22 02:24:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:53,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:53,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:53,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-05-22 02:24:53,908 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1355648106, now seen corresponding path program 40 times [2021-05-22 02:24:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:53,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141179435] [2021-05-22 02:24:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141179435] [2021-05-22 02:24:53,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141179435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799077664] [2021-05-22 02:24:53,949 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 [2021-05-22 02:24:53,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:53,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799077664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:54,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:54,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:54,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820114332] [2021-05-22 02:24:54,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:54,041 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) [2021-05-22 02:24:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:54,134 INFO L93 Difference]: Finished difference Result 576 states and 1637 transitions. [2021-05-22 02:24:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:54,134 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 [2021-05-22 02:24:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:54,135 INFO L225 Difference]: With dead ends: 576 [2021-05-22 02:24:54,135 INFO L226 Difference]: Without dead ends: 567 [2021-05-22 02:24:54,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-22 02:24:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 272. [2021-05-22 02:24:54,138 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) [2021-05-22 02:24:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-22 02:24:54,138 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-22 02:24:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:54,138 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-22 02:24:54,138 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) [2021-05-22 02:24:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-22 02:24:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:54,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:54,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:54,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:54,339 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash -620013387, now seen corresponding path program 40 times [2021-05-22 02:24:54,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:54,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620954527] [2021-05-22 02:24:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:54,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620954527] [2021-05-22 02:24:54,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620954527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:54,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16088933] [2021-05-22 02:24:54,368 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 [2021-05-22 02:24:54,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:54,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16088933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:54,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:54,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:54,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091196987] [2021-05-22 02:24:54,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:54,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:54,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:54,448 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) [2021-05-22 02:24:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:54,537 INFO L93 Difference]: Finished difference Result 530 states and 1549 transitions. [2021-05-22 02:24:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:54,538 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 [2021-05-22 02:24:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:54,538 INFO L225 Difference]: With dead ends: 530 [2021-05-22 02:24:54,538 INFO L226 Difference]: Without dead ends: 530 [2021-05-22 02:24:54,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-22 02:24:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 264. [2021-05-22 02:24:54,541 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) [2021-05-22 02:24:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 794 transitions. [2021-05-22 02:24:54,542 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 794 transitions. Word has length 19 [2021-05-22 02:24:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:54,542 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 794 transitions. [2021-05-22 02:24:54,542 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) [2021-05-22 02:24:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 794 transitions. [2021-05-22 02:24:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:54,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:54,542 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:54,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:54,743 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:54,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1979491946, now seen corresponding path program 41 times [2021-05-22 02:24:54,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:54,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484145137] [2021-05-22 02:24:54,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484145137] [2021-05-22 02:24:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484145137] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:54,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:54,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:54,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373487143] [2021-05-22 02:24:54,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:54,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:54,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:54,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:54,775 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) [2021-05-22 02:24:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:54,843 INFO L93 Difference]: Finished difference Result 551 states and 1548 transitions. [2021-05-22 02:24:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:54,843 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 [2021-05-22 02:24:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:54,844 INFO L225 Difference]: With dead ends: 551 [2021-05-22 02:24:54,844 INFO L226 Difference]: Without dead ends: 545 [2021-05-22 02:24:54,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-22 02:24:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 274. [2021-05-22 02:24:54,847 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) [2021-05-22 02:24:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 819 transitions. [2021-05-22 02:24:54,848 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 819 transitions. Word has length 19 [2021-05-22 02:24:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:54,848 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 819 transitions. [2021-05-22 02:24:54,848 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) [2021-05-22 02:24:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 819 transitions. [2021-05-22 02:24:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:54,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:54,848 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:54,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616 [2021-05-22 02:24:54,848 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash 877577794, now seen corresponding path program 42 times [2021-05-22 02:24:54,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:54,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579564402] [2021-05-22 02:24:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:54,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579564402] [2021-05-22 02:24:54,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579564402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:54,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:54,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:54,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523274034] [2021-05-22 02:24:54,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:54,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:54,876 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) [2021-05-22 02:24:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:54,940 INFO L93 Difference]: Finished difference Result 515 states and 1465 transitions. [2021-05-22 02:24:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:54,941 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 [2021-05-22 02:24:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:54,941 INFO L225 Difference]: With dead ends: 515 [2021-05-22 02:24:54,941 INFO L226 Difference]: Without dead ends: 504 [2021-05-22 02:24:54,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:54,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-22 02:24:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 264. [2021-05-22 02:24:54,944 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) [2021-05-22 02:24:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 793 transitions. [2021-05-22 02:24:54,945 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 793 transitions. Word has length 19 [2021-05-22 02:24:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:54,945 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 793 transitions. [2021-05-22 02:24:54,945 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) [2021-05-22 02:24:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 793 transitions. [2021-05-22 02:24:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:54,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:54,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:54,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617 [2021-05-22 02:24:54,945 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1591463139, now seen corresponding path program 41 times [2021-05-22 02:24:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:54,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009336773] [2021-05-22 02:24:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:54,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009336773] [2021-05-22 02:24:54,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009336773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:54,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:54,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:54,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238266028] [2021-05-22 02:24:54,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:54,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:54,973 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) [2021-05-22 02:24:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,051 INFO L93 Difference]: Finished difference Result 504 states and 1450 transitions. [2021-05-22 02:24:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,052 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 [2021-05-22 02:24:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,052 INFO L225 Difference]: With dead ends: 504 [2021-05-22 02:24:55,052 INFO L226 Difference]: Without dead ends: 498 [2021-05-22 02:24:55,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-22 02:24:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 276. [2021-05-22 02:24:55,055 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) [2021-05-22 02:24:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 830 transitions. [2021-05-22 02:24:55,056 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 830 transitions. Word has length 19 [2021-05-22 02:24:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,056 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 830 transitions. [2021-05-22 02:24:55,056 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) [2021-05-22 02:24:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 830 transitions. [2021-05-22 02:24:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,056 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618 [2021-05-22 02:24:55,056 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1320953447, now seen corresponding path program 42 times [2021-05-22 02:24:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594994894] [2021-05-22 02:24:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594994894] [2021-05-22 02:24:55,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594994894] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:55,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:55,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:55,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065223580] [2021-05-22 02:24:55,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:55,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:55,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:55,085 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) [2021-05-22 02:24:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,168 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-05-22 02:24:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,168 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 [2021-05-22 02:24:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,169 INFO L225 Difference]: With dead ends: 482 [2021-05-22 02:24:55,169 INFO L226 Difference]: Without dead ends: 482 [2021-05-22 02:24:55,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-05-22 02:24:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 261. [2021-05-22 02:24:55,172 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) [2021-05-22 02:24:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 784 transitions. [2021-05-22 02:24:55,172 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 784 transitions. Word has length 19 [2021-05-22 02:24:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,172 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 784 transitions. [2021-05-22 02:24:55,172 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) [2021-05-22 02:24:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 784 transitions. [2021-05-22 02:24:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619 [2021-05-22 02:24:55,173 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,173 INFO L82 PathProgramCache]: Analyzing trace with hash -549537380, now seen corresponding path program 43 times [2021-05-22 02:24:55,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525078266] [2021-05-22 02:24:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525078266] [2021-05-22 02:24:55,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525078266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:55,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:55,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:55,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900912375] [2021-05-22 02:24:55,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:55,201 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) [2021-05-22 02:24:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,262 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-05-22 02:24:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,263 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 [2021-05-22 02:24:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,263 INFO L225 Difference]: With dead ends: 407 [2021-05-22 02:24:55,263 INFO L226 Difference]: Without dead ends: 383 [2021-05-22 02:24:55,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-22 02:24:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 265. [2021-05-22 02:24:55,266 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) [2021-05-22 02:24:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 790 transitions. [2021-05-22 02:24:55,266 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 790 transitions. Word has length 19 [2021-05-22 02:24:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,267 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 790 transitions. [2021-05-22 02:24:55,267 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) [2021-05-22 02:24:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 790 transitions. [2021-05-22 02:24:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,267 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,267 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620 [2021-05-22 02:24:55,267 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1404112814, now seen corresponding path program 44 times [2021-05-22 02:24:55,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823516792] [2021-05-22 02:24:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823516792] [2021-05-22 02:24:55,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823516792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:55,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:55,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:55,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109016234] [2021-05-22 02:24:55,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:55,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:55,294 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) [2021-05-22 02:24:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,371 INFO L93 Difference]: Finished difference Result 430 states and 1198 transitions. [2021-05-22 02:24:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,371 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 [2021-05-22 02:24:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,372 INFO L225 Difference]: With dead ends: 430 [2021-05-22 02:24:55,372 INFO L226 Difference]: Without dead ends: 424 [2021-05-22 02:24:55,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-22 02:24:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 275. [2021-05-22 02:24:55,375 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) [2021-05-22 02:24:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 815 transitions. [2021-05-22 02:24:55,375 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 815 transitions. Word has length 19 [2021-05-22 02:24:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,375 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 815 transitions. [2021-05-22 02:24:55,375 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) [2021-05-22 02:24:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 815 transitions. [2021-05-22 02:24:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621 [2021-05-22 02:24:55,376 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash -986737450, now seen corresponding path program 45 times [2021-05-22 02:24:55,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504979688] [2021-05-22 02:24:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504979688] [2021-05-22 02:24:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504979688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:55,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:55,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186750229] [2021-05-22 02:24:55,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:55,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:55,414 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) [2021-05-22 02:24:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,493 INFO L93 Difference]: Finished difference Result 394 states and 1115 transitions. [2021-05-22 02:24:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,493 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 [2021-05-22 02:24:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,493 INFO L225 Difference]: With dead ends: 394 [2021-05-22 02:24:55,493 INFO L226 Difference]: Without dead ends: 379 [2021-05-22 02:24:55,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-22 02:24:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 261. [2021-05-22 02:24:55,496 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) [2021-05-22 02:24:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 780 transitions. [2021-05-22 02:24:55,497 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 780 transitions. Word has length 19 [2021-05-22 02:24:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,497 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 780 transitions. [2021-05-22 02:24:55,497 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) [2021-05-22 02:24:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 780 transitions. [2021-05-22 02:24:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,497 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622 [2021-05-22 02:24:55,497 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash 879484852, now seen corresponding path program 46 times [2021-05-22 02:24:55,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077618412] [2021-05-22 02:24:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077618412] [2021-05-22 02:24:55,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077618412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:55,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:55,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:55,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852482060] [2021-05-22 02:24:55,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:55,523 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) [2021-05-22 02:24:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,579 INFO L93 Difference]: Finished difference Result 393 states and 1118 transitions. [2021-05-22 02:24:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,579 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 [2021-05-22 02:24:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,580 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:24:55,580 INFO L226 Difference]: Without dead ends: 381 [2021-05-22 02:24:55,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-22 02:24:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 263. [2021-05-22 02:24:55,582 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) [2021-05-22 02:24:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 783 transitions. [2021-05-22 02:24:55,583 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 783 transitions. Word has length 19 [2021-05-22 02:24:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,583 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 783 transitions. [2021-05-22 02:24:55,583 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) [2021-05-22 02:24:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 783 transitions. [2021-05-22 02:24:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,583 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,583 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623 [2021-05-22 02:24:55,583 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 199463632, now seen corresponding path program 47 times [2021-05-22 02:24:55,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427608383] [2021-05-22 02:24:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427608383] [2021-05-22 02:24:55,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427608383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:55,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:55,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146955689] [2021-05-22 02:24:55,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:55,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:55,613 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) [2021-05-22 02:24:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,688 INFO L93 Difference]: Finished difference Result 381 states and 1080 transitions. [2021-05-22 02:24:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,689 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 [2021-05-22 02:24:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,689 INFO L225 Difference]: With dead ends: 381 [2021-05-22 02:24:55,689 INFO L226 Difference]: Without dead ends: 375 [2021-05-22 02:24:55,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-22 02:24:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 273. [2021-05-22 02:24:55,692 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) [2021-05-22 02:24:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 808 transitions. [2021-05-22 02:24:55,692 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 808 transitions. Word has length 19 [2021-05-22 02:24:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,692 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 808 transitions. [2021-05-22 02:24:55,692 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) [2021-05-22 02:24:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 808 transitions. [2021-05-22 02:24:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624 [2021-05-22 02:24:55,693 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2103580664, now seen corresponding path program 48 times [2021-05-22 02:24:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622339169] [2021-05-22 02:24:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622339169] [2021-05-22 02:24:55,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622339169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:55,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:55,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:55,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146249911] [2021-05-22 02:24:55,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:55,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:55,719 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) [2021-05-22 02:24:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,791 INFO L93 Difference]: Finished difference Result 345 states and 997 transitions. [2021-05-22 02:24:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,791 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 [2021-05-22 02:24:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,791 INFO L225 Difference]: With dead ends: 345 [2021-05-22 02:24:55,791 INFO L226 Difference]: Without dead ends: 328 [2021-05-22 02:24:55,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-22 02:24:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 257. [2021-05-22 02:24:55,794 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) [2021-05-22 02:24:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 772 transitions. [2021-05-22 02:24:55,794 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 772 transitions. Word has length 19 [2021-05-22 02:24:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,794 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 772 transitions. [2021-05-22 02:24:55,794 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) [2021-05-22 02:24:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 772 transitions. [2021-05-22 02:24:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:55,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625 [2021-05-22 02:24:55,795 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1070480311, now seen corresponding path program 43 times [2021-05-22 02:24:55,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:55,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338395957] [2021-05-22 02:24:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:55,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338395957] [2021-05-22 02:24:55,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338395957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:55,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574705823] [2021-05-22 02:24:55,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:24:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:55,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574705823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:55,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:55,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:24:55,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666801520] [2021-05-22 02:24:55,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:24:55,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:55,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:24:55,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:24:55,885 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) [2021-05-22 02:24:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,961 INFO L93 Difference]: Finished difference Result 449 states and 1320 transitions. [2021-05-22 02:24:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:55,962 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 [2021-05-22 02:24:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,962 INFO L225 Difference]: With dead ends: 449 [2021-05-22 02:24:55,962 INFO L226 Difference]: Without dead ends: 449 [2021-05-22 02:24:55,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:24:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-22 02:24:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 235. [2021-05-22 02:24:55,965 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) [2021-05-22 02:24:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 707 transitions. [2021-05-22 02:24:55,965 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 707 transitions. Word has length 19 [2021-05-22 02:24:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,965 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 707 transitions. [2021-05-22 02:24:55,965 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) [2021-05-22 02:24:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 707 transitions. [2021-05-22 02:24:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:55,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:56,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:56,166 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:56,167 INFO L82 PathProgramCache]: Analyzing trace with hash 170307403, now seen corresponding path program 44 times [2021-05-22 02:24:56,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:56,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585526634] [2021-05-22 02:24:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:56,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:56,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585526634] [2021-05-22 02:24:56,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585526634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:56,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3805509] [2021-05-22 02:24:56,189 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 [2021-05-22 02:24:56,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:56,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:56,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3805509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:56,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:56,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:56,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190703978] [2021-05-22 02:24:56,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:56,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:56,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:56,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:56,254 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) [2021-05-22 02:24:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:56,334 INFO L93 Difference]: Finished difference Result 437 states and 1251 transitions. [2021-05-22 02:24:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:56,335 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 [2021-05-22 02:24:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:56,335 INFO L225 Difference]: With dead ends: 437 [2021-05-22 02:24:56,335 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:24:56,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:24:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 241. [2021-05-22 02:24:56,338 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) [2021-05-22 02:24:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 721 transitions. [2021-05-22 02:24:56,338 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 721 transitions. Word has length 19 [2021-05-22 02:24:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:56,338 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 721 transitions. [2021-05-22 02:24:56,338 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) [2021-05-22 02:24:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 721 transitions. [2021-05-22 02:24:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:56,339 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:56,339 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:56,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-05-22 02:24:56,539 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1045052217, now seen corresponding path program 45 times [2021-05-22 02:24:56,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:56,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118194752] [2021-05-22 02:24:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:56,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:56,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118194752] [2021-05-22 02:24:56,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118194752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:56,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112881642] [2021-05-22 02:24:56,565 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 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 [2021-05-22 02:24:56,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:56,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112881642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:56,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:56,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:56,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381906873] [2021-05-22 02:24:56,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:56,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:56,794 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) [2021-05-22 02:24:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:56,878 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-05-22 02:24:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:56,878 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 [2021-05-22 02:24:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:56,879 INFO L225 Difference]: With dead ends: 415 [2021-05-22 02:24:56,879 INFO L226 Difference]: Without dead ends: 415 [2021-05-22 02:24:56,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-22 02:24:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 214. [2021-05-22 02:24:56,881 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) [2021-05-22 02:24:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 639 transitions. [2021-05-22 02:24:56,882 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 639 transitions. Word has length 19 [2021-05-22 02:24:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:56,882 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 639 transitions. [2021-05-22 02:24:56,882 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) [2021-05-22 02:24:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 639 transitions. [2021-05-22 02:24:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:56,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:56,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:57,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-05-22 02:24:57,083 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:57,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:57,083 INFO L82 PathProgramCache]: Analyzing trace with hash -990658535, now seen corresponding path program 46 times [2021-05-22 02:24:57,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:57,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428009527] [2021-05-22 02:24:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:57,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:57,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428009527] [2021-05-22 02:24:57,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428009527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:57,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125396732] [2021-05-22 02:24:57,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:24:57,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:57,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125396732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:57,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:57,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:24:57,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268324926] [2021-05-22 02:24:57,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:24:57,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:24:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:24:57,167 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) [2021-05-22 02:24:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:57,241 INFO L93 Difference]: Finished difference Result 367 states and 1064 transitions. [2021-05-22 02:24:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:57,242 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 [2021-05-22 02:24:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:57,242 INFO L225 Difference]: With dead ends: 367 [2021-05-22 02:24:57,242 INFO L226 Difference]: Without dead ends: 355 [2021-05-22 02:24:57,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-22 02:24:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 217. [2021-05-22 02:24:57,244 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) [2021-05-22 02:24:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-05-22 02:24:57,245 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-05-22 02:24:57,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:57,245 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-05-22 02:24:57,245 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) [2021-05-22 02:24:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-05-22 02:24:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:57,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:57,245 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:57,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-05-22 02:24:57,446 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -33107299, now seen corresponding path program 47 times [2021-05-22 02:24:57,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:57,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133891862] [2021-05-22 02:24:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:57,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:57,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133891862] [2021-05-22 02:24:57,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133891862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:57,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818464496] [2021-05-22 02:24:57,470 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 [2021-05-22 02:24:57,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:57,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:57,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818464496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:57,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:57,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:57,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906357132] [2021-05-22 02:24:57,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:57,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:57,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:57,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:57,560 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) [2021-05-22 02:24:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:57,640 INFO L93 Difference]: Finished difference Result 355 states and 1025 transitions. [2021-05-22 02:24:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:57,640 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 [2021-05-22 02:24:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:57,640 INFO L225 Difference]: With dead ends: 355 [2021-05-22 02:24:57,640 INFO L226 Difference]: Without dead ends: 349 [2021-05-22 02:24:57,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-22 02:24:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 229. [2021-05-22 02:24:57,643 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) [2021-05-22 02:24:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 687 transitions. [2021-05-22 02:24:57,643 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 687 transitions. Word has length 19 [2021-05-22 02:24:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:57,643 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 687 transitions. [2021-05-22 02:24:57,643 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) [2021-05-22 02:24:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 687 transitions. [2021-05-22 02:24:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:57,643 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:57,644 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:57,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:57,844 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:57,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1248466919, now seen corresponding path program 48 times [2021-05-22 02:24:57,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:57,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197490015] [2021-05-22 02:24:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:57,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197490015] [2021-05-22 02:24:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197490015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481688828] [2021-05-22 02:24:57,872 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 [2021-05-22 02:24:57,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:24:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:57,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:57,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481688828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:57,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:57,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:57,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216982294] [2021-05-22 02:24:57,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:57,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:57,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:57,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:57,945 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) [2021-05-22 02:24:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:58,023 INFO L93 Difference]: Finished difference Result 320 states and 940 transitions. [2021-05-22 02:24:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:58,024 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 [2021-05-22 02:24:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:58,024 INFO L225 Difference]: With dead ends: 320 [2021-05-22 02:24:58,024 INFO L226 Difference]: Without dead ends: 320 [2021-05-22 02:24:58,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-22 02:24:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 215. [2021-05-22 02:24:58,026 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) [2021-05-22 02:24:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 643 transitions. [2021-05-22 02:24:58,027 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 643 transitions. Word has length 19 [2021-05-22 02:24:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:58,027 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 643 transitions. [2021-05-22 02:24:58,027 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) [2021-05-22 02:24:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 643 transitions. [2021-05-22 02:24:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:58,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:58,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:58,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:58,228 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1006159271, now seen corresponding path program 49 times [2021-05-22 02:24:58,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:58,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507582543] [2021-05-22 02:24:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:58,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:58,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507582543] [2021-05-22 02:24:58,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507582543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:58,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:58,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:58,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978276145] [2021-05-22 02:24:58,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:58,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:58,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:58,254 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) [2021-05-22 02:24:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:58,340 INFO L93 Difference]: Finished difference Result 361 states and 1031 transitions. [2021-05-22 02:24:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:58,341 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 [2021-05-22 02:24:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:58,341 INFO L225 Difference]: With dead ends: 361 [2021-05-22 02:24:58,341 INFO L226 Difference]: Without dead ends: 353 [2021-05-22 02:24:58,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-22 02:24:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 233. [2021-05-22 02:24:58,344 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) [2021-05-22 02:24:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 695 transitions. [2021-05-22 02:24:58,344 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 695 transitions. Word has length 19 [2021-05-22 02:24:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:58,344 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 695 transitions. [2021-05-22 02:24:58,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 695 transitions. [2021-05-22 02:24:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:58,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:58,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:58,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638 [2021-05-22 02:24:58,345 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1386896911, now seen corresponding path program 50 times [2021-05-22 02:24:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:58,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346104095] [2021-05-22 02:24:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:58,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346104095] [2021-05-22 02:24:58,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346104095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:58,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:58,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:58,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086494604] [2021-05-22 02:24:58,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:58,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:58,370 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) [2021-05-22 02:24:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:58,465 INFO L93 Difference]: Finished difference Result 359 states and 1026 transitions. [2021-05-22 02:24:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:58,465 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 [2021-05-22 02:24:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:58,465 INFO L225 Difference]: With dead ends: 359 [2021-05-22 02:24:58,465 INFO L226 Difference]: Without dead ends: 351 [2021-05-22 02:24:58,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-22 02:24:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 231. [2021-05-22 02:24:58,468 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) [2021-05-22 02:24:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-05-22 02:24:58,468 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 19 [2021-05-22 02:24:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:58,468 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-05-22 02:24:58,468 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) [2021-05-22 02:24:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-05-22 02:24:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:58,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:58,469 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:58,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639 [2021-05-22 02:24:58,469 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1984233569, now seen corresponding path program 51 times [2021-05-22 02:24:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:58,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816006319] [2021-05-22 02:24:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:58,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:58,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816006319] [2021-05-22 02:24:58,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816006319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:58,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:58,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:58,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920078143] [2021-05-22 02:24:58,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:58,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:58,492 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) [2021-05-22 02:24:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:58,572 INFO L93 Difference]: Finished difference Result 373 states and 1067 transitions. [2021-05-22 02:24:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:58,573 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 [2021-05-22 02:24:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:58,573 INFO L225 Difference]: With dead ends: 373 [2021-05-22 02:24:58,573 INFO L226 Difference]: Without dead ends: 359 [2021-05-22 02:24:58,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-22 02:24:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-22 02:24:58,579 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) [2021-05-22 02:24:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-05-22 02:24:58,579 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 19 [2021-05-22 02:24:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:58,579 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-05-22 02:24:58,579 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) [2021-05-22 02:24:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-05-22 02:24:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:58,579 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:58,580 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:58,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640 [2021-05-22 02:24:58,580 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1454990024, now seen corresponding path program 49 times [2021-05-22 02:24:58,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:58,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838210883] [2021-05-22 02:24:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:58,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:58,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838210883] [2021-05-22 02:24:58,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838210883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:58,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413344820] [2021-05-22 02:24:58,610 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 [2021-05-22 02:24:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:58,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413344820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:58,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:58,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:58,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042398122] [2021-05-22 02:24:58,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:58,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:58,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:58,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:58,691 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) [2021-05-22 02:24:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:58,770 INFO L93 Difference]: Finished difference Result 461 states and 1330 transitions. [2021-05-22 02:24:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:58,770 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 [2021-05-22 02:24:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:58,770 INFO L225 Difference]: With dead ends: 461 [2021-05-22 02:24:58,770 INFO L226 Difference]: Without dead ends: 461 [2021-05-22 02:24:58,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-22 02:24:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 235. [2021-05-22 02:24:58,773 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) [2021-05-22 02:24:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 706 transitions. [2021-05-22 02:24:58,774 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 706 transitions. Word has length 19 [2021-05-22 02:24:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:58,774 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 706 transitions. [2021-05-22 02:24:58,774 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) [2021-05-22 02:24:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 706 transitions. [2021-05-22 02:24:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:58,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:58,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:58,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-05-22 02:24:58,974 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash -524828848, now seen corresponding path program 50 times [2021-05-22 02:24:58,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:58,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268266968] [2021-05-22 02:24:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:59,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268266968] [2021-05-22 02:24:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268266968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:59,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791230360] [2021-05-22 02:24:59,002 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 [2021-05-22 02:24:59,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:59,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:59,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:59,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791230360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:59,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:59,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:24:59,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42025918] [2021-05-22 02:24:59,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:24:59,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:24:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:59,080 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) [2021-05-22 02:24:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:59,160 INFO L93 Difference]: Finished difference Result 467 states and 1339 transitions. [2021-05-22 02:24:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:59,160 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 [2021-05-22 02:24:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:59,160 INFO L225 Difference]: With dead ends: 467 [2021-05-22 02:24:59,160 INFO L226 Difference]: Without dead ends: 461 [2021-05-22 02:24:59,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-22 02:24:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 232. [2021-05-22 02:24:59,163 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) [2021-05-22 02:24:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 694 transitions. [2021-05-22 02:24:59,163 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 694 transitions. Word has length 19 [2021-05-22 02:24:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:59,164 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 694 transitions. [2021-05-22 02:24:59,164 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) [2021-05-22 02:24:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 694 transitions. [2021-05-22 02:24:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:59,164 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:59,164 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:59,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-05-22 02:24:59,364 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1537521380, now seen corresponding path program 51 times [2021-05-22 02:24:59,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:59,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672536140] [2021-05-22 02:24:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672536140] [2021-05-22 02:24:59,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672536140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:59,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238471638] [2021-05-22 02:24:59,389 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 [2021-05-22 02:24:59,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:24:59,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:24:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238471638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:59,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:59,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:24:59,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324252586] [2021-05-22 02:24:59,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:24:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:24:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:24:59,456 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) [2021-05-22 02:24:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:59,520 INFO L93 Difference]: Finished difference Result 458 states and 1306 transitions. [2021-05-22 02:24:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:59,520 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 [2021-05-22 02:24:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:59,521 INFO L225 Difference]: With dead ends: 458 [2021-05-22 02:24:59,521 INFO L226 Difference]: Without dead ends: 446 [2021-05-22 02:24:59,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:24:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-22 02:24:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 230. [2021-05-22 02:24:59,524 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) [2021-05-22 02:24:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 686 transitions. [2021-05-22 02:24:59,524 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 686 transitions. Word has length 19 [2021-05-22 02:24:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:59,524 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 686 transitions. [2021-05-22 02:24:59,524 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) [2021-05-22 02:24:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 686 transitions. [2021-05-22 02:24:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:59,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:59,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:59,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:59,725 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash 242250915, now seen corresponding path program 52 times [2021-05-22 02:24:59,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:59,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365143020] [2021-05-22 02:24:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:59,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365143020] [2021-05-22 02:24:59,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365143020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:59,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:59,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:59,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146882880] [2021-05-22 02:24:59,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:59,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:59,752 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) [2021-05-22 02:24:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:59,841 INFO L93 Difference]: Finished difference Result 403 states and 1125 transitions. [2021-05-22 02:24:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:59,842 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 [2021-05-22 02:24:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:59,842 INFO L225 Difference]: With dead ends: 403 [2021-05-22 02:24:59,842 INFO L226 Difference]: Without dead ends: 395 [2021-05-22 02:24:59,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-22 02:24:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 242. [2021-05-22 02:24:59,845 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) [2021-05-22 02:24:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 732 transitions. [2021-05-22 02:24:59,845 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 732 transitions. Word has length 19 [2021-05-22 02:24:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:59,845 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 732 transitions. [2021-05-22 02:24:59,845 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) [2021-05-22 02:24:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 732 transitions. [2021-05-22 02:24:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:59,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:59,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:59,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648 [2021-05-22 02:24:59,846 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:59,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash 622988555, now seen corresponding path program 53 times [2021-05-22 02:24:59,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:59,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284696400] [2021-05-22 02:24:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:59,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284696400] [2021-05-22 02:24:59,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284696400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:24:59,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:24:59,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:24:59,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798425959] [2021-05-22 02:24:59,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:59,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:59,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:59,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:59,872 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) [2021-05-22 02:24:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:59,961 INFO L93 Difference]: Finished difference Result 409 states and 1140 transitions. [2021-05-22 02:24:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:24:59,961 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 [2021-05-22 02:24:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:59,961 INFO L225 Difference]: With dead ends: 409 [2021-05-22 02:24:59,961 INFO L226 Difference]: Without dead ends: 401 [2021-05-22 02:24:59,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:24:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-22 02:24:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 244. [2021-05-22 02:24:59,964 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) [2021-05-22 02:24:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 736 transitions. [2021-05-22 02:24:59,965 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 736 transitions. Word has length 19 [2021-05-22 02:24:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:59,965 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 736 transitions. [2021-05-22 02:24:59,965 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) [2021-05-22 02:24:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 736 transitions. [2021-05-22 02:24:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:24:59,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:59,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:59,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649 [2021-05-22 02:24:59,965 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2120353452, now seen corresponding path program 52 times [2021-05-22 02:24:59,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:59,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880057780] [2021-05-22 02:24:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880057780] [2021-05-22 02:24:59,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880057780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313095447] [2021-05-22 02:24:59,995 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 [2021-05-22 02:25:00,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:00,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:00,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:00,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313095447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:00,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:00,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:00,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324404911] [2021-05-22 02:25:00,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:00,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:00,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:00,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:00,077 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) [2021-05-22 02:25:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:00,157 INFO L93 Difference]: Finished difference Result 532 states and 1524 transitions. [2021-05-22 02:25:00,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:00,157 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 [2021-05-22 02:25:00,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:00,158 INFO L225 Difference]: With dead ends: 532 [2021-05-22 02:25:00,158 INFO L226 Difference]: Without dead ends: 532 [2021-05-22 02:25:00,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-22 02:25:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 250. [2021-05-22 02:25:00,161 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) [2021-05-22 02:25:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 763 transitions. [2021-05-22 02:25:00,161 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 763 transitions. Word has length 19 [2021-05-22 02:25:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:00,161 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 763 transitions. [2021-05-22 02:25:00,162 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) [2021-05-22 02:25:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 763 transitions. [2021-05-22 02:25:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:00,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:00,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:00,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-05-22 02:25:00,362 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1190192276, now seen corresponding path program 53 times [2021-05-22 02:25:00,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:00,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109046710] [2021-05-22 02:25:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:00,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:00,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109046710] [2021-05-22 02:25:00,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109046710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:00,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428476237] [2021-05-22 02:25:00,392 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 [2021-05-22 02:25:00,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:00,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:00,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:00,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:00,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428476237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:00,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:00,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:00,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852053182] [2021-05-22 02:25:00,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:00,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:00,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:00,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:00,482 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) [2021-05-22 02:25:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:00,554 INFO L93 Difference]: Finished difference Result 514 states and 1455 transitions. [2021-05-22 02:25:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:00,555 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 [2021-05-22 02:25:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:00,555 INFO L225 Difference]: With dead ends: 514 [2021-05-22 02:25:00,555 INFO L226 Difference]: Without dead ends: 508 [2021-05-22 02:25:00,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-05-22 02:25:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 249. [2021-05-22 02:25:00,558 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) [2021-05-22 02:25:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 758 transitions. [2021-05-22 02:25:00,559 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 758 transitions. Word has length 19 [2021-05-22 02:25:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:00,559 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 758 transitions. [2021-05-22 02:25:00,559 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) [2021-05-22 02:25:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 758 transitions. [2021-05-22 02:25:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:00,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:00,559 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:00,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-05-22 02:25:00,760 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash 38116775, now seen corresponding path program 54 times [2021-05-22 02:25:00,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:00,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097111152] [2021-05-22 02:25:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:00,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097111152] [2021-05-22 02:25:00,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097111152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743822069] [2021-05-22 02:25:00,787 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 [2021-05-22 02:25:00,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:25:00,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:00,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:00,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743822069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:00,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:00,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:00,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727354940] [2021-05-22 02:25:00,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:00,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:00,873 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) [2021-05-22 02:25:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:00,955 INFO L93 Difference]: Finished difference Result 375 states and 1066 transitions. [2021-05-22 02:25:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:00,955 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 [2021-05-22 02:25:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:00,956 INFO L225 Difference]: With dead ends: 375 [2021-05-22 02:25:00,956 INFO L226 Difference]: Without dead ends: 367 [2021-05-22 02:25:00,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-22 02:25:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 249. [2021-05-22 02:25:00,958 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) [2021-05-22 02:25:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 761 transitions. [2021-05-22 02:25:00,959 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 761 transitions. Word has length 19 [2021-05-22 02:25:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:00,959 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 761 transitions. [2021-05-22 02:25:00,959 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) [2021-05-22 02:25:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 761 transitions. [2021-05-22 02:25:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:00,959 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:00,959 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:01,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-05-22 02:25:01,160 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1919953796, now seen corresponding path program 54 times [2021-05-22 02:25:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:01,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443453649] [2021-05-22 02:25:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:01,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443453649] [2021-05-22 02:25:01,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443453649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:01,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017002213] [2021-05-22 02:25:01,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:25:01,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:25:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017002213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:01,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:01,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275029470] [2021-05-22 02:25:01,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:01,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:01,275 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) [2021-05-22 02:25:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:01,359 INFO L93 Difference]: Finished difference Result 459 states and 1316 transitions. [2021-05-22 02:25:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:01,360 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 [2021-05-22 02:25:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:01,360 INFO L225 Difference]: With dead ends: 459 [2021-05-22 02:25:01,360 INFO L226 Difference]: Without dead ends: 459 [2021-05-22 02:25:01,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-22 02:25:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 240. [2021-05-22 02:25:01,363 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) [2021-05-22 02:25:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 731 transitions. [2021-05-22 02:25:01,363 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 731 transitions. Word has length 19 [2021-05-22 02:25:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 731 transitions. [2021-05-22 02:25:01,364 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) [2021-05-22 02:25:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 731 transitions. [2021-05-22 02:25:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:01,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:01,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:01,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-05-22 02:25:01,564 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2001194468, now seen corresponding path program 55 times [2021-05-22 02:25:01,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:01,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774407738] [2021-05-22 02:25:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774407738] [2021-05-22 02:25:01,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774407738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132668780] [2021-05-22 02:25:01,592 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 [2021-05-22 02:25:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132668780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:01,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:01,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:01,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082595601] [2021-05-22 02:25:01,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:01,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:01,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:01,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:01,685 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) [2021-05-22 02:25:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:01,765 INFO L93 Difference]: Finished difference Result 414 states and 1188 transitions. [2021-05-22 02:25:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:01,765 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 [2021-05-22 02:25:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:01,766 INFO L225 Difference]: With dead ends: 414 [2021-05-22 02:25:01,766 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:25:01,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:25:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 240. [2021-05-22 02:25:01,768 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) [2021-05-22 02:25:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 727 transitions. [2021-05-22 02:25:01,769 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 727 transitions. Word has length 19 [2021-05-22 02:25:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:01,769 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 727 transitions. [2021-05-22 02:25:01,769 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) [2021-05-22 02:25:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 727 transitions. [2021-05-22 02:25:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:01,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:01,769 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:01,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable658 [2021-05-22 02:25:01,970 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:01,970 INFO L82 PathProgramCache]: Analyzing trace with hash 318111335, now seen corresponding path program 55 times [2021-05-22 02:25:01,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:01,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547299814] [2021-05-22 02:25:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547299814] [2021-05-22 02:25:02,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547299814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694719292] [2021-05-22 02:25:02,007 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 [2021-05-22 02:25:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:02,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694719292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:02,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:02,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514070732] [2021-05-22 02:25:02,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:02,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:02,112 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) [2021-05-22 02:25:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,215 INFO L93 Difference]: Finished difference Result 347 states and 1016 transitions. [2021-05-22 02:25:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:02,216 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 [2021-05-22 02:25:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,216 INFO L225 Difference]: With dead ends: 347 [2021-05-22 02:25:02,216 INFO L226 Difference]: Without dead ends: 347 [2021-05-22 02:25:02,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-22 02:25:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 236. [2021-05-22 02:25:02,219 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) [2021-05-22 02:25:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 715 transitions. [2021-05-22 02:25:02,219 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 715 transitions. Word has length 19 [2021-05-22 02:25:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,219 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 715 transitions. [2021-05-22 02:25:02,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 715 transitions. [2021-05-22 02:25:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:02,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,220 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:02,420 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1377350628, now seen corresponding path program 56 times [2021-05-22 02:25:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238531374] [2021-05-22 02:25:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238531374] [2021-05-22 02:25:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238531374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:02,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:02,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:02,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390322409] [2021-05-22 02:25:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:02,453 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) [2021-05-22 02:25:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,522 INFO L93 Difference]: Finished difference Result 452 states and 1270 transitions. [2021-05-22 02:25:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,523 INFO L225 Difference]: With dead ends: 452 [2021-05-22 02:25:02,523 INFO L226 Difference]: Without dead ends: 446 [2021-05-22 02:25:02,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-22 02:25:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 246. [2021-05-22 02:25:02,525 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) [2021-05-22 02:25:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 740 transitions. [2021-05-22 02:25:02,526 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 740 transitions. Word has length 19 [2021-05-22 02:25:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,526 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 740 transitions. [2021-05-22 02:25:02,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 740 transitions. [2021-05-22 02:25:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:02,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662 [2021-05-22 02:25:02,526 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1815702516, now seen corresponding path program 57 times [2021-05-22 02:25:02,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415925830] [2021-05-22 02:25:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415925830] [2021-05-22 02:25:02,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415925830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:02,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:02,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:02,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59400578] [2021-05-22 02:25:02,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:02,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:02,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:02,563 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) [2021-05-22 02:25:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,626 INFO L93 Difference]: Finished difference Result 416 states and 1187 transitions. [2021-05-22 02:25:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:02,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,627 INFO L225 Difference]: With dead ends: 416 [2021-05-22 02:25:02,627 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:25:02,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:25:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 236. [2021-05-22 02:25:02,630 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) [2021-05-22 02:25:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 714 transitions. [2021-05-22 02:25:02,630 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 714 transitions. Word has length 19 [2021-05-22 02:25:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,630 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 714 transitions. [2021-05-22 02:25:02,630 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) [2021-05-22 02:25:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 714 transitions. [2021-05-22 02:25:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:02,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable663 [2021-05-22 02:25:02,631 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,631 INFO L82 PathProgramCache]: Analyzing trace with hash -653338417, now seen corresponding path program 56 times [2021-05-22 02:25:02,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919929044] [2021-05-22 02:25:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919929044] [2021-05-22 02:25:02,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919929044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:02,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:02,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:02,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053129767] [2021-05-22 02:25:02,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:02,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:02,669 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) [2021-05-22 02:25:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,769 INFO L93 Difference]: Finished difference Result 388 states and 1108 transitions. [2021-05-22 02:25:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:02,769 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 [2021-05-22 02:25:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,770 INFO L225 Difference]: With dead ends: 388 [2021-05-22 02:25:02,770 INFO L226 Difference]: Without dead ends: 382 [2021-05-22 02:25:02,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-22 02:25:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 248. [2021-05-22 02:25:02,772 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) [2021-05-22 02:25:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 751 transitions. [2021-05-22 02:25:02,773 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 751 transitions. Word has length 19 [2021-05-22 02:25:02,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,773 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 751 transitions. [2021-05-22 02:25:02,773 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) [2021-05-22 02:25:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 751 transitions. [2021-05-22 02:25:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:02,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable664 [2021-05-22 02:25:02,773 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,773 INFO L82 PathProgramCache]: Analyzing trace with hash -382828725, now seen corresponding path program 57 times [2021-05-22 02:25:02,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858192728] [2021-05-22 02:25:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858192728] [2021-05-22 02:25:02,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858192728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:02,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:02,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:02,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596869162] [2021-05-22 02:25:02,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:02,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:02,804 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) [2021-05-22 02:25:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,909 INFO L93 Difference]: Finished difference Result 366 states and 1071 transitions. [2021-05-22 02:25:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:02,909 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 [2021-05-22 02:25:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,909 INFO L225 Difference]: With dead ends: 366 [2021-05-22 02:25:02,909 INFO L226 Difference]: Without dead ends: 366 [2021-05-22 02:25:02,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-22 02:25:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 235. [2021-05-22 02:25:02,912 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) [2021-05-22 02:25:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 711 transitions. [2021-05-22 02:25:02,912 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 711 transitions. Word has length 19 [2021-05-22 02:25:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,912 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 711 transitions. [2021-05-22 02:25:02,912 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) [2021-05-22 02:25:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 711 transitions. [2021-05-22 02:25:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:02,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,913 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665 [2021-05-22 02:25:02,913 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1250504300, now seen corresponding path program 58 times [2021-05-22 02:25:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212268113] [2021-05-22 02:25:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212268113] [2021-05-22 02:25:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212268113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:02,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:02,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:02,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457801233] [2021-05-22 02:25:02,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:02,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:02,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:02,937 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) [2021-05-22 02:25:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,994 INFO L93 Difference]: Finished difference Result 391 states and 1119 transitions. [2021-05-22 02:25:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:02,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,995 INFO L225 Difference]: With dead ends: 391 [2021-05-22 02:25:02,995 INFO L226 Difference]: Without dead ends: 379 [2021-05-22 02:25:02,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-22 02:25:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 237. [2021-05-22 02:25:02,997 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) [2021-05-22 02:25:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 714 transitions. [2021-05-22 02:25:02,998 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 714 transitions. Word has length 19 [2021-05-22 02:25:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,998 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 714 transitions. [2021-05-22 02:25:02,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 714 transitions. [2021-05-22 02:25:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:02,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,998 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666 [2021-05-22 02:25:02,998 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1644682960, now seen corresponding path program 59 times [2021-05-22 02:25:02,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898998795] [2021-05-22 02:25:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898998795] [2021-05-22 02:25:03,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898998795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621788830] [2021-05-22 02:25:03,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,024 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) [2021-05-22 02:25:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,090 INFO L93 Difference]: Finished difference Result 379 states and 1081 transitions. [2021-05-22 02:25:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,090 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 [2021-05-22 02:25:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,090 INFO L225 Difference]: With dead ends: 379 [2021-05-22 02:25:03,090 INFO L226 Difference]: Without dead ends: 373 [2021-05-22 02:25:03,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-22 02:25:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 247. [2021-05-22 02:25:03,093 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) [2021-05-22 02:25:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 739 transitions. [2021-05-22 02:25:03,093 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 739 transitions. Word has length 19 [2021-05-22 02:25:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,093 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 739 transitions. [2021-05-22 02:25:03,093 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) [2021-05-22 02:25:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 739 transitions. [2021-05-22 02:25:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,094 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667 [2021-05-22 02:25:03,094 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash 542768808, now seen corresponding path program 60 times [2021-05-22 02:25:03,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401609844] [2021-05-22 02:25:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401609844] [2021-05-22 02:25:03,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401609844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502301848] [2021-05-22 02:25:03,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,123 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) [2021-05-22 02:25:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,176 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-05-22 02:25:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,176 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 [2021-05-22 02:25:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,177 INFO L225 Difference]: With dead ends: 343 [2021-05-22 02:25:03,177 INFO L226 Difference]: Without dead ends: 330 [2021-05-22 02:25:03,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-22 02:25:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 235. [2021-05-22 02:25:03,179 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) [2021-05-22 02:25:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 710 transitions. [2021-05-22 02:25:03,179 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 710 transitions. Word has length 19 [2021-05-22 02:25:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,180 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 710 transitions. [2021-05-22 02:25:03,180 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) [2021-05-22 02:25:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 710 transitions. [2021-05-22 02:25:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,180 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,180 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668 [2021-05-22 02:25:03,180 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1072803101, now seen corresponding path program 58 times [2021-05-22 02:25:03,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825465871] [2021-05-22 02:25:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825465871] [2021-05-22 02:25:03,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825465871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485672318] [2021-05-22 02:25:03,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,205 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) [2021-05-22 02:25:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,296 INFO L93 Difference]: Finished difference Result 325 states and 939 transitions. [2021-05-22 02:25:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,297 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 [2021-05-22 02:25:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,297 INFO L225 Difference]: With dead ends: 325 [2021-05-22 02:25:03,297 INFO L226 Difference]: Without dead ends: 313 [2021-05-22 02:25:03,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-22 02:25:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 235. [2021-05-22 02:25:03,299 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) [2021-05-22 02:25:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 709 transitions. [2021-05-22 02:25:03,300 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 709 transitions. Word has length 19 [2021-05-22 02:25:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,300 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 709 transitions. [2021-05-22 02:25:03,300 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) [2021-05-22 02:25:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 709 transitions. [2021-05-22 02:25:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669 [2021-05-22 02:25:03,300 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2138427743, now seen corresponding path program 59 times [2021-05-22 02:25:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849423658] [2021-05-22 02:25:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849423658] [2021-05-22 02:25:03,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849423658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546806842] [2021-05-22 02:25:03,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,328 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) [2021-05-22 02:25:03,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,422 INFO L93 Difference]: Finished difference Result 329 states and 951 transitions. [2021-05-22 02:25:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,423 INFO L225 Difference]: With dead ends: 329 [2021-05-22 02:25:03,423 INFO L226 Difference]: Without dead ends: 323 [2021-05-22 02:25:03,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-22 02:25:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-05-22 02:25:03,425 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) [2021-05-22 02:25:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 723 transitions. [2021-05-22 02:25:03,426 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 723 transitions. Word has length 19 [2021-05-22 02:25:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,426 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 723 transitions. [2021-05-22 02:25:03,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 723 transitions. [2021-05-22 02:25:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,426 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670 [2021-05-22 02:25:03,426 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1867918051, now seen corresponding path program 60 times [2021-05-22 02:25:03,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683894168] [2021-05-22 02:25:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683894168] [2021-05-22 02:25:03,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683894168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201840662] [2021-05-22 02:25:03,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,459 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) [2021-05-22 02:25:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,555 INFO L93 Difference]: Finished difference Result 294 states and 876 transitions. [2021-05-22 02:25:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,555 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 [2021-05-22 02:25:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,555 INFO L225 Difference]: With dead ends: 294 [2021-05-22 02:25:03,555 INFO L226 Difference]: Without dead ends: 294 [2021-05-22 02:25:03,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-22 02:25:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 217. [2021-05-22 02:25:03,557 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) [2021-05-22 02:25:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 650 transitions. [2021-05-22 02:25:03,558 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 650 transitions. Word has length 19 [2021-05-22 02:25:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,558 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 650 transitions. [2021-05-22 02:25:03,558 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) [2021-05-22 02:25:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 650 transitions. [2021-05-22 02:25:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,558 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671 [2021-05-22 02:25:03,558 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1028896921, now seen corresponding path program 61 times [2021-05-22 02:25:03,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359049114] [2021-05-22 02:25:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359049114] [2021-05-22 02:25:03,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359049114] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908805414] [2021-05-22 02:25:03,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,584 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) [2021-05-22 02:25:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,644 INFO L93 Difference]: Finished difference Result 362 states and 1019 transitions. [2021-05-22 02:25:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,645 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 [2021-05-22 02:25:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,645 INFO L225 Difference]: With dead ends: 362 [2021-05-22 02:25:03,645 INFO L226 Difference]: Without dead ends: 346 [2021-05-22 02:25:03,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-22 02:25:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 219. [2021-05-22 02:25:03,647 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) [2021-05-22 02:25:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 653 transitions. [2021-05-22 02:25:03,648 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 653 transitions. Word has length 19 [2021-05-22 02:25:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,648 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 653 transitions. [2021-05-22 02:25:03,648 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) [2021-05-22 02:25:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 653 transitions. [2021-05-22 02:25:03,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672 [2021-05-22 02:25:03,648 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash 493077425, now seen corresponding path program 62 times [2021-05-22 02:25:03,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753208951] [2021-05-22 02:25:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753208951] [2021-05-22 02:25:03,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753208951] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962938256] [2021-05-22 02:25:03,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,674 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) [2021-05-22 02:25:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,752 INFO L93 Difference]: Finished difference Result 391 states and 1075 transitions. [2021-05-22 02:25:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,753 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 [2021-05-22 02:25:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,753 INFO L225 Difference]: With dead ends: 391 [2021-05-22 02:25:03,753 INFO L226 Difference]: Without dead ends: 383 [2021-05-22 02:25:03,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-22 02:25:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 231. [2021-05-22 02:25:03,757 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) [2021-05-22 02:25:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-05-22 02:25:03,757 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-05-22 02:25:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,757 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-05-22 02:25:03,757 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) [2021-05-22 02:25:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-05-22 02:25:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,758 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,758 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673 [2021-05-22 02:25:03,758 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,758 INFO L82 PathProgramCache]: Analyzing trace with hash 873815065, now seen corresponding path program 63 times [2021-05-22 02:25:03,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796936439] [2021-05-22 02:25:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796936439] [2021-05-22 02:25:03,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796936439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773009917] [2021-05-22 02:25:03,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,785 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) [2021-05-22 02:25:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,856 INFO L93 Difference]: Finished difference Result 354 states and 997 transitions. [2021-05-22 02:25:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,856 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 [2021-05-22 02:25:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,857 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:25:03,857 INFO L226 Difference]: Without dead ends: 344 [2021-05-22 02:25:03,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-22 02:25:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 217. [2021-05-22 02:25:03,860 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) [2021-05-22 02:25:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-05-22 02:25:03,860 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-05-22 02:25:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,861 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-05-22 02:25:03,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-05-22 02:25:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674 [2021-05-22 02:25:03,861 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1196865479, now seen corresponding path program 64 times [2021-05-22 02:25:03,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997984160] [2021-05-22 02:25:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997984160] [2021-05-22 02:25:03,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997984160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284501884] [2021-05-22 02:25:03,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,888 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) [2021-05-22 02:25:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,961 INFO L93 Difference]: Finished difference Result 397 states and 1090 transitions. [2021-05-22 02:25:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:03,961 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 [2021-05-22 02:25:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,962 INFO L225 Difference]: With dead ends: 397 [2021-05-22 02:25:03,962 INFO L226 Difference]: Without dead ends: 389 [2021-05-22 02:25:03,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-22 02:25:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 233. [2021-05-22 02:25:03,965 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) [2021-05-22 02:25:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 690 transitions. [2021-05-22 02:25:03,965 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 690 transitions. Word has length 19 [2021-05-22 02:25:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,965 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 690 transitions. [2021-05-22 02:25:03,965 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) [2021-05-22 02:25:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 690 transitions. [2021-05-22 02:25:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:03,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable675 [2021-05-22 02:25:03,966 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash -816127839, now seen corresponding path program 65 times [2021-05-22 02:25:03,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025803788] [2021-05-22 02:25:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025803788] [2021-05-22 02:25:03,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025803788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:03,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:03,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:03,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666218897] [2021-05-22 02:25:03,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:03,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:03,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:03,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:03,991 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) [2021-05-22 02:25:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:04,069 INFO L93 Difference]: Finished difference Result 395 states and 1085 transitions. [2021-05-22 02:25:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:04,069 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 [2021-05-22 02:25:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:04,070 INFO L225 Difference]: With dead ends: 395 [2021-05-22 02:25:04,070 INFO L226 Difference]: Without dead ends: 387 [2021-05-22 02:25:04,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-22 02:25:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 231. [2021-05-22 02:25:04,072 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) [2021-05-22 02:25:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-05-22 02:25:04,073 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-05-22 02:25:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,073 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-05-22 02:25:04,073 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) [2021-05-22 02:25:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-05-22 02:25:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:04,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:04,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676 [2021-05-22 02:25:04,073 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:04,073 INFO L82 PathProgramCache]: Analyzing trace with hash -218791181, now seen corresponding path program 66 times [2021-05-22 02:25:04,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:04,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345158164] [2021-05-22 02:25:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:04,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345158164] [2021-05-22 02:25:04,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345158164] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:04,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:04,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:04,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529137751] [2021-05-22 02:25:04,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:04,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:04,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:04,097 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) [2021-05-22 02:25:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:04,154 INFO L93 Difference]: Finished difference Result 358 states and 1005 transitions. [2021-05-22 02:25:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:04,155 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 [2021-05-22 02:25:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:04,155 INFO L225 Difference]: With dead ends: 358 [2021-05-22 02:25:04,155 INFO L226 Difference]: Without dead ends: 342 [2021-05-22 02:25:04,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-22 02:25:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 215. [2021-05-22 02:25:04,157 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) [2021-05-22 02:25:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-22 02:25:04,158 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-22 02:25:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,158 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-22 02:25:04,158 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) [2021-05-22 02:25:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-22 02:25:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:04,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,158 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:04,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677 [2021-05-22 02:25:04,158 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:04,159 INFO L82 PathProgramCache]: Analyzing trace with hash 313632770, now seen corresponding path program 61 times [2021-05-22 02:25:04,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:04,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164582082] [2021-05-22 02:25:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164582082] [2021-05-22 02:25:04,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164582082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488278360] [2021-05-22 02:25:04,189 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 [2021-05-22 02:25:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:04,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:04,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488278360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:04,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:04,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:25:04,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548151311] [2021-05-22 02:25:04,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:04,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:04,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:04,250 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) [2021-05-22 02:25:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:04,324 INFO L93 Difference]: Finished difference Result 390 states and 1140 transitions. [2021-05-22 02:25:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:04,324 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 [2021-05-22 02:25:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:04,325 INFO L225 Difference]: With dead ends: 390 [2021-05-22 02:25:04,325 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:25:04,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:25:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 218. [2021-05-22 02:25:04,328 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) [2021-05-22 02:25:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 653 transitions. [2021-05-22 02:25:04,329 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 653 transitions. Word has length 19 [2021-05-22 02:25:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,329 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 653 transitions. [2021-05-22 02:25:04,329 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) [2021-05-22 02:25:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 653 transitions. [2021-05-22 02:25:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:04,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:04,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-05-22 02:25:04,530 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash 157800938, now seen corresponding path program 62 times [2021-05-22 02:25:04,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:04,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841083828] [2021-05-22 02:25:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:04,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841083828] [2021-05-22 02:25:04,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841083828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:04,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138950546] [2021-05-22 02:25:04,557 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 [2021-05-22 02:25:04,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138950546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:04,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:04,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:25:04,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759629125] [2021-05-22 02:25:04,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:04,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:04,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:04,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:04,624 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) [2021-05-22 02:25:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:04,709 INFO L93 Difference]: Finished difference Result 453 states and 1308 transitions. [2021-05-22 02:25:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:04,710 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 [2021-05-22 02:25:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:04,710 INFO L225 Difference]: With dead ends: 453 [2021-05-22 02:25:04,710 INFO L226 Difference]: Without dead ends: 453 [2021-05-22 02:25:04,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-22 02:25:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 221. [2021-05-22 02:25:04,713 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) [2021-05-22 02:25:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 665 transitions. [2021-05-22 02:25:04,713 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 665 transitions. Word has length 19 [2021-05-22 02:25:04,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,713 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 665 transitions. [2021-05-22 02:25:04,713 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) [2021-05-22 02:25:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 665 transitions. [2021-05-22 02:25:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:04,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:04,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:04,914 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1087962114, now seen corresponding path program 63 times [2021-05-22 02:25:04,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:04,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368421609] [2021-05-22 02:25:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368421609] [2021-05-22 02:25:04,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368421609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881453660] [2021-05-22 02:25:04,937 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 [2021-05-22 02:25:04,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:25:04,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:04,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881453660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:05,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:25:05,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119737971] [2021-05-22 02:25:05,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:05,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:05,000 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) [2021-05-22 02:25:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:05,081 INFO L93 Difference]: Finished difference Result 399 states and 1161 transitions. [2021-05-22 02:25:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:05,082 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 [2021-05-22 02:25:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:05,082 INFO L225 Difference]: With dead ends: 399 [2021-05-22 02:25:05,082 INFO L226 Difference]: Without dead ends: 393 [2021-05-22 02:25:05,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-22 02:25:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 215. [2021-05-22 02:25:05,085 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) [2021-05-22 02:25:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-22 02:25:05,085 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-22 02:25:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:05,085 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-22 02:25:05,085 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) [2021-05-22 02:25:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-22 02:25:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:05,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:05,085 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:05,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:05,286 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:05,286 INFO L82 PathProgramCache]: Analyzing trace with hash -727997342, now seen corresponding path program 64 times [2021-05-22 02:25:05,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:05,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611753090] [2021-05-22 02:25:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:05,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611753090] [2021-05-22 02:25:05,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611753090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848527236] [2021-05-22 02:25:05,314 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 [2021-05-22 02:25:05,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:05,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:05,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:05,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848527236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:05,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:05,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78462275] [2021-05-22 02:25:05,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:05,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:05,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:05,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:05,389 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) [2021-05-22 02:25:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:05,473 INFO L93 Difference]: Finished difference Result 423 states and 1218 transitions. [2021-05-22 02:25:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:05,473 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 [2021-05-22 02:25:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:05,474 INFO L225 Difference]: With dead ends: 423 [2021-05-22 02:25:05,474 INFO L226 Difference]: Without dead ends: 423 [2021-05-22 02:25:05,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:25:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-22 02:25:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 221. [2021-05-22 02:25:05,476 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) [2021-05-22 02:25:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 668 transitions. [2021-05-22 02:25:05,477 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 668 transitions. Word has length 19 [2021-05-22 02:25:05,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:05,477 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 668 transitions. [2021-05-22 02:25:05,477 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) [2021-05-22 02:25:05,477 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 668 transitions. [2021-05-22 02:25:05,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:05,477 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:05,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:05,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-05-22 02:25:05,678 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash 202163834, now seen corresponding path program 65 times [2021-05-22 02:25:05,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:05,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497860604] [2021-05-22 02:25:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:05,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497860604] [2021-05-22 02:25:05,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497860604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921273174] [2021-05-22 02:25:05,702 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 [2021-05-22 02:25:05,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:05,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:05,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921273174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:05,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:05,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086541236] [2021-05-22 02:25:05,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:05,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:05,775 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) [2021-05-22 02:25:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:05,855 INFO L93 Difference]: Finished difference Result 429 states and 1227 transitions. [2021-05-22 02:25:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:05,855 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 [2021-05-22 02:25:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:05,856 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:25:05,856 INFO L226 Difference]: Without dead ends: 423 [2021-05-22 02:25:05,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:25:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-22 02:25:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 218. [2021-05-22 02:25:05,858 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) [2021-05-22 02:25:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 656 transitions. [2021-05-22 02:25:05,859 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 656 transitions. Word has length 19 [2021-05-22 02:25:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:05,859 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 656 transitions. [2021-05-22 02:25:05,859 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) [2021-05-22 02:25:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 656 transitions. [2021-05-22 02:25:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:05,859 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:05,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:06,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-05-22 02:25:06,060 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:06,060 INFO L82 PathProgramCache]: Analyzing trace with hash -810528698, now seen corresponding path program 66 times [2021-05-22 02:25:06,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:06,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000231597] [2021-05-22 02:25:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000231597] [2021-05-22 02:25:06,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000231597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:06,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728303007] [2021-05-22 02:25:06,085 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 [2021-05-22 02:25:06,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:25:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:06,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728303007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:06,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:06,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:25:06,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241052710] [2021-05-22 02:25:06,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:06,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:06,159 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) [2021-05-22 02:25:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:06,228 INFO L93 Difference]: Finished difference Result 378 states and 1095 transitions. [2021-05-22 02:25:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:06,228 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 [2021-05-22 02:25:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:06,229 INFO L225 Difference]: With dead ends: 378 [2021-05-22 02:25:06,229 INFO L226 Difference]: Without dead ends: 366 [2021-05-22 02:25:06,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-22 02:25:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 215. [2021-05-22 02:25:06,231 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) [2021-05-22 02:25:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-22 02:25:06,231 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-22 02:25:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:06,232 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-22 02:25:06,232 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) [2021-05-22 02:25:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-22 02:25:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:06,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:06,232 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:06,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-05-22 02:25:06,432 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1177425635, now seen corresponding path program 67 times [2021-05-22 02:25:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:06,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648467945] [2021-05-22 02:25:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:06,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648467945] [2021-05-22 02:25:06,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648467945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:06,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:06,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135509109] [2021-05-22 02:25:06,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:06,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:06,456 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) [2021-05-22 02:25:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:06,518 INFO L93 Difference]: Finished difference Result 416 states and 1156 transitions. [2021-05-22 02:25:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:06,518 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 [2021-05-22 02:25:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:06,519 INFO L225 Difference]: With dead ends: 416 [2021-05-22 02:25:06,519 INFO L226 Difference]: Without dead ends: 400 [2021-05-22 02:25:06,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-22 02:25:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 219. [2021-05-22 02:25:06,522 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) [2021-05-22 02:25:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 652 transitions. [2021-05-22 02:25:06,523 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 652 transitions. Word has length 19 [2021-05-22 02:25:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:06,523 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 652 transitions. [2021-05-22 02:25:06,523 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) [2021-05-22 02:25:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 652 transitions. [2021-05-22 02:25:06,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:06,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:06,524 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:06,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690 [2021-05-22 02:25:06,524 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:06,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:06,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1713245131, now seen corresponding path program 68 times [2021-05-22 02:25:06,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:06,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189131924] [2021-05-22 02:25:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:06,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189131924] [2021-05-22 02:25:06,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189131924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:06,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:06,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219396255] [2021-05-22 02:25:06,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:06,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:06,554 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) [2021-05-22 02:25:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:06,627 INFO L93 Difference]: Finished difference Result 445 states and 1210 transitions. [2021-05-22 02:25:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:06,628 INFO L225 Difference]: With dead ends: 445 [2021-05-22 02:25:06,628 INFO L226 Difference]: Without dead ends: 437 [2021-05-22 02:25:06,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-22 02:25:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 235. [2021-05-22 02:25:06,630 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) [2021-05-22 02:25:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 696 transitions. [2021-05-22 02:25:06,631 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 696 transitions. Word has length 19 [2021-05-22 02:25:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:06,631 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 696 transitions. [2021-05-22 02:25:06,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 696 transitions. [2021-05-22 02:25:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:06,631 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:06,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:06,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691 [2021-05-22 02:25:06,631 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:06,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1332507491, now seen corresponding path program 69 times [2021-05-22 02:25:06,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:06,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862329124] [2021-05-22 02:25:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:06,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862329124] [2021-05-22 02:25:06,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862329124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:06,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:06,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:06,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183940044] [2021-05-22 02:25:06,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:06,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:06,659 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) [2021-05-22 02:25:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:06,725 INFO L93 Difference]: Finished difference Result 408 states and 1124 transitions. [2021-05-22 02:25:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:06,725 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 [2021-05-22 02:25:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:06,726 INFO L225 Difference]: With dead ends: 408 [2021-05-22 02:25:06,726 INFO L226 Difference]: Without dead ends: 398 [2021-05-22 02:25:06,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-22 02:25:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 225. [2021-05-22 02:25:06,729 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) [2021-05-22 02:25:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-05-22 02:25:06,729 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-05-22 02:25:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:06,729 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-05-22 02:25:06,729 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) [2021-05-22 02:25:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-05-22 02:25:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:06,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:06,729 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:06,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692 [2021-05-22 02:25:06,730 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1162202982, now seen corresponding path program 67 times [2021-05-22 02:25:06,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:06,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777776978] [2021-05-22 02:25:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777776978] [2021-05-22 02:25:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777776978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34393472] [2021-05-22 02:25:06,755 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 [2021-05-22 02:25:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:06,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34393472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:06,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:06,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:25:06,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280303037] [2021-05-22 02:25:06,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:06,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:06,816 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) [2021-05-22 02:25:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:06,897 INFO L93 Difference]: Finished difference Result 510 states and 1495 transitions. [2021-05-22 02:25:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:06,897 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 [2021-05-22 02:25:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:06,898 INFO L225 Difference]: With dead ends: 510 [2021-05-22 02:25:06,898 INFO L226 Difference]: Without dead ends: 510 [2021-05-22 02:25:06,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-05-22 02:25:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 225. [2021-05-22 02:25:06,901 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) [2021-05-22 02:25:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-05-22 02:25:06,901 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-05-22 02:25:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:06,901 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-05-22 02:25:06,901 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) [2021-05-22 02:25:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-05-22 02:25:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:06,902 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:06,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:07,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:07,102 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:07,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1006371150, now seen corresponding path program 68 times [2021-05-22 02:25:07,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:07,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792263125] [2021-05-22 02:25:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:07,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792263125] [2021-05-22 02:25:07,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792263125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731527523] [2021-05-22 02:25:07,129 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 [2021-05-22 02:25:07,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:07,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731527523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:07,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:07,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:25:07,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266295142] [2021-05-22 02:25:07,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:07,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:07,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:07,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:07,195 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) [2021-05-22 02:25:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:07,272 INFO L93 Difference]: Finished difference Result 528 states and 1528 transitions. [2021-05-22 02:25:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:07,273 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 [2021-05-22 02:25:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:07,273 INFO L225 Difference]: With dead ends: 528 [2021-05-22 02:25:07,273 INFO L226 Difference]: Without dead ends: 528 [2021-05-22 02:25:07,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-05-22 02:25:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 231. [2021-05-22 02:25:07,276 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) [2021-05-22 02:25:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 695 transitions. [2021-05-22 02:25:07,277 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 695 transitions. Word has length 19 [2021-05-22 02:25:07,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:07,277 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 695 transitions. [2021-05-22 02:25:07,277 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) [2021-05-22 02:25:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 695 transitions. [2021-05-22 02:25:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:07,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:07,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:07,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable694,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:07,478 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1936532326, now seen corresponding path program 69 times [2021-05-22 02:25:07,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:07,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75028387] [2021-05-22 02:25:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:07,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:07,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75028387] [2021-05-22 02:25:07,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75028387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:07,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218106116] [2021-05-22 02:25:07,506 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 [2021-05-22 02:25:07,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:25:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:07,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218106116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:07,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:07,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:25:07,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19463143] [2021-05-22 02:25:07,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:07,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:07,575 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) [2021-05-22 02:25:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:07,648 INFO L93 Difference]: Finished difference Result 474 states and 1375 transitions. [2021-05-22 02:25:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:07,648 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 [2021-05-22 02:25:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:07,649 INFO L225 Difference]: With dead ends: 474 [2021-05-22 02:25:07,649 INFO L226 Difference]: Without dead ends: 468 [2021-05-22 02:25:07,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-22 02:25:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 227. [2021-05-22 02:25:07,651 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) [2021-05-22 02:25:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 681 transitions. [2021-05-22 02:25:07,652 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 681 transitions. Word has length 19 [2021-05-22 02:25:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:07,652 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 681 transitions. [2021-05-22 02:25:07,652 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) [2021-05-22 02:25:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 681 transitions. [2021-05-22 02:25:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:07,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:07,652 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:07,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-05-22 02:25:07,853 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1084350617, now seen corresponding path program 70 times [2021-05-22 02:25:07,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:07,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651694297] [2021-05-22 02:25:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:07,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:07,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651694297] [2021-05-22 02:25:07,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651694297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:07,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522871988] [2021-05-22 02:25:07,882 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 [2021-05-22 02:25:07,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:07,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:07,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522871988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:07,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:07,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:07,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255159737] [2021-05-22 02:25:07,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:07,965 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) [2021-05-22 02:25:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:08,028 INFO L93 Difference]: Finished difference Result 367 states and 1041 transitions. [2021-05-22 02:25:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:08,029 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 [2021-05-22 02:25:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:08,029 INFO L225 Difference]: With dead ends: 367 [2021-05-22 02:25:08,029 INFO L226 Difference]: Without dead ends: 351 [2021-05-22 02:25:08,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-22 02:25:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 221. [2021-05-22 02:25:08,031 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) [2021-05-22 02:25:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 660 transitions. [2021-05-22 02:25:08,032 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 660 transitions. Word has length 19 [2021-05-22 02:25:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:08,032 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 660 transitions. [2021-05-22 02:25:08,032 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) [2021-05-22 02:25:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 660 transitions. [2021-05-22 02:25:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:08,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:08,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:08,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable698,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:08,233 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1215342274, now seen corresponding path program 70 times [2021-05-22 02:25:08,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:08,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378865284] [2021-05-22 02:25:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:08,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:08,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378865284] [2021-05-22 02:25:08,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378865284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:08,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796726845] [2021-05-22 02:25:08,263 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 [2021-05-22 02:25:08,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:08,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:08,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:08,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796726845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:08,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:08,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-22 02:25:08,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880905626] [2021-05-22 02:25:08,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:08,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:08,338 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) [2021-05-22 02:25:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:08,438 INFO L93 Difference]: Finished difference Result 404 states and 1187 transitions. [2021-05-22 02:25:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:08,438 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 [2021-05-22 02:25:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:08,439 INFO L225 Difference]: With dead ends: 404 [2021-05-22 02:25:08,439 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:25:08,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:25:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 200. [2021-05-22 02:25:08,442 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) [2021-05-22 02:25:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 594 transitions. [2021-05-22 02:25:08,442 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 594 transitions. Word has length 19 [2021-05-22 02:25:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:08,442 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 594 transitions. [2021-05-22 02:25:08,442 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) [2021-05-22 02:25:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 594 transitions. [2021-05-22 02:25:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:08,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:08,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:08,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-05-22 02:25:08,665 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:08,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1597715687, now seen corresponding path program 71 times [2021-05-22 02:25:08,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:08,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499135290] [2021-05-22 02:25:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:08,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499135290] [2021-05-22 02:25:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499135290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598245209] [2021-05-22 02:25:08,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:25:08,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:08,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:08,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598245209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:08,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:08,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:08,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049401612] [2021-05-22 02:25:08,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:08,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:08,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:08,799 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) [2021-05-22 02:25:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:08,890 INFO L93 Difference]: Finished difference Result 356 states and 1020 transitions. [2021-05-22 02:25:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:08,890 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 [2021-05-22 02:25:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:08,890 INFO L225 Difference]: With dead ends: 356 [2021-05-22 02:25:08,890 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:25:08,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:25:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:25:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 216. [2021-05-22 02:25:08,893 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) [2021-05-22 02:25:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-05-22 02:25:08,893 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-05-22 02:25:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:08,893 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-05-22 02:25:08,893 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) [2021-05-22 02:25:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-05-22 02:25:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:08,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:08,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:09,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:09,094 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:09,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1565768734, now seen corresponding path program 71 times [2021-05-22 02:25:09,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:09,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530290133] [2021-05-22 02:25:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:09,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530290133] [2021-05-22 02:25:09,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530290133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341707453] [2021-05-22 02:25:09,120 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 [2021-05-22 02:25:09,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:09,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:09,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:09,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341707453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:09,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:25:09,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938965224] [2021-05-22 02:25:09,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:09,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:09,199 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) [2021-05-22 02:25:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:09,289 INFO L93 Difference]: Finished difference Result 393 states and 1145 transitions. [2021-05-22 02:25:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:09,289 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 [2021-05-22 02:25:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:09,290 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:25:09,290 INFO L226 Difference]: Without dead ends: 393 [2021-05-22 02:25:09,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-22 02:25:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-05-22 02:25:09,292 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) [2021-05-22 02:25:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-05-22 02:25:09,292 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-05-22 02:25:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:09,292 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-05-22 02:25:09,292 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) [2021-05-22 02:25:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-05-22 02:25:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:09,293 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:09,293 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:09,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-05-22 02:25:09,493 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 857230482, now seen corresponding path program 72 times [2021-05-22 02:25:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:09,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225920960] [2021-05-22 02:25:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:09,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225920960] [2021-05-22 02:25:09,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225920960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366325080] [2021-05-22 02:25:09,518 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 [2021-05-22 02:25:09,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:25:09,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366325080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:09,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:25:09,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185051007] [2021-05-22 02:25:09,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:09,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:09,601 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) [2021-05-22 02:25:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:09,675 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-05-22 02:25:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:09,675 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 [2021-05-22 02:25:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:09,676 INFO L225 Difference]: With dead ends: 339 [2021-05-22 02:25:09,676 INFO L226 Difference]: Without dead ends: 330 [2021-05-22 02:25:09,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-22 02:25:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 216. [2021-05-22 02:25:09,678 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) [2021-05-22 02:25:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 646 transitions. [2021-05-22 02:25:09,679 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 646 transitions. Word has length 19 [2021-05-22 02:25:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:09,679 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 646 transitions. [2021-05-22 02:25:09,679 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) [2021-05-22 02:25:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 646 transitions. [2021-05-22 02:25:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:09,679 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:09,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:09,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:09,879 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1118431011, now seen corresponding path program 72 times [2021-05-22 02:25:09,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:09,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10343179] [2021-05-22 02:25:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:09,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10343179] [2021-05-22 02:25:09,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10343179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612218142] [2021-05-22 02:25:09,910 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 [2021-05-22 02:25:09,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:25:09,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:09,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:09,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612218142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:09,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:09,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:09,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365203682] [2021-05-22 02:25:09,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:09,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:09,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:09,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:09,989 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) [2021-05-22 02:25:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:10,087 INFO L93 Difference]: Finished difference Result 310 states and 907 transitions. [2021-05-22 02:25:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:10,087 INFO L225 Difference]: With dead ends: 310 [2021-05-22 02:25:10,087 INFO L226 Difference]: Without dead ends: 310 [2021-05-22 02:25:10,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:25:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-22 02:25:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 196. [2021-05-22 02:25:10,090 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) [2021-05-22 02:25:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 582 transitions. [2021-05-22 02:25:10,091 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 582 transitions. Word has length 19 [2021-05-22 02:25:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:10,091 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 582 transitions. [2021-05-22 02:25:10,091 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) [2021-05-22 02:25:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 582 transitions. [2021-05-22 02:25:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:10,092 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:10,092 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:10,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:10,305 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash -720751567, now seen corresponding path program 73 times [2021-05-22 02:25:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:10,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773733620] [2021-05-22 02:25:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:10,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773733620] [2021-05-22 02:25:10,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773733620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:10,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:10,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:10,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795409436] [2021-05-22 02:25:10,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:10,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:10,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:10,332 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) [2021-05-22 02:25:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:10,406 INFO L93 Difference]: Finished difference Result 415 states and 1176 transitions. [2021-05-22 02:25:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:10,407 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 [2021-05-22 02:25:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:10,407 INFO L225 Difference]: With dead ends: 415 [2021-05-22 02:25:10,407 INFO L226 Difference]: Without dead ends: 407 [2021-05-22 02:25:10,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-22 02:25:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 216. [2021-05-22 02:25:10,410 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) [2021-05-22 02:25:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-05-22 02:25:10,410 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-05-22 02:25:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:10,410 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-05-22 02:25:10,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-05-22 02:25:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:10,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:10,410 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:10,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710 [2021-05-22 02:25:10,410 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash -340013927, now seen corresponding path program 74 times [2021-05-22 02:25:10,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:10,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986551169] [2021-05-22 02:25:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:10,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986551169] [2021-05-22 02:25:10,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986551169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:10,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:10,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:10,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277216647] [2021-05-22 02:25:10,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:10,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:10,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:10,437 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) [2021-05-22 02:25:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:10,512 INFO L93 Difference]: Finished difference Result 421 states and 1191 transitions. [2021-05-22 02:25:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:10,512 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 [2021-05-22 02:25:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:10,512 INFO L225 Difference]: With dead ends: 421 [2021-05-22 02:25:10,512 INFO L226 Difference]: Without dead ends: 413 [2021-05-22 02:25:10,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-22 02:25:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 220. [2021-05-22 02:25:10,515 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) [2021-05-22 02:25:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 657 transitions. [2021-05-22 02:25:10,515 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 657 transitions. Word has length 19 [2021-05-22 02:25:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:10,515 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 657 transitions. [2021-05-22 02:25:10,515 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) [2021-05-22 02:25:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 657 transitions. [2021-05-22 02:25:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:10,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:10,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:10,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711 [2021-05-22 02:25:10,516 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:10,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:10,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1211611362, now seen corresponding path program 73 times [2021-05-22 02:25:10,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:10,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562166952] [2021-05-22 02:25:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:10,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562166952] [2021-05-22 02:25:10,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562166952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:10,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249985714] [2021-05-22 02:25:10,544 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 [2021-05-22 02:25:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249985714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:10,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:10,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790620418] [2021-05-22 02:25:10,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:10,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:10,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:10,621 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) [2021-05-22 02:25:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:10,716 INFO L93 Difference]: Finished difference Result 479 states and 1393 transitions. [2021-05-22 02:25:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:10,717 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 [2021-05-22 02:25:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:10,717 INFO L225 Difference]: With dead ends: 479 [2021-05-22 02:25:10,717 INFO L226 Difference]: Without dead ends: 479 [2021-05-22 02:25:10,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-22 02:25:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 226. [2021-05-22 02:25:10,720 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) [2021-05-22 02:25:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 684 transitions. [2021-05-22 02:25:10,720 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 684 transitions. Word has length 19 [2021-05-22 02:25:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:10,720 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 684 transitions. [2021-05-22 02:25:10,721 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) [2021-05-22 02:25:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 684 transitions. [2021-05-22 02:25:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:10,721 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:10,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:10,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-05-22 02:25:10,921 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2141772538, now seen corresponding path program 74 times [2021-05-22 02:25:10,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:10,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657608966] [2021-05-22 02:25:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:10,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657608966] [2021-05-22 02:25:10,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657608966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:10,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600355217] [2021-05-22 02:25:10,947 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 [2021-05-22 02:25:10,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:10,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:10,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:11,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600355217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:11,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:11,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:11,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164715024] [2021-05-22 02:25:11,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:11,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:11,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:11,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:11,018 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) [2021-05-22 02:25:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:11,095 INFO L93 Difference]: Finished difference Result 461 states and 1324 transitions. [2021-05-22 02:25:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:11,095 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 [2021-05-22 02:25:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:11,096 INFO L225 Difference]: With dead ends: 461 [2021-05-22 02:25:11,096 INFO L226 Difference]: Without dead ends: 455 [2021-05-22 02:25:11,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-05-22 02:25:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 225. [2021-05-22 02:25:11,099 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) [2021-05-22 02:25:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 679 transitions. [2021-05-22 02:25:11,099 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 679 transitions. Word has length 19 [2021-05-22 02:25:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:11,100 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 679 transitions. [2021-05-22 02:25:11,100 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) [2021-05-22 02:25:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 679 transitions. [2021-05-22 02:25:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:11,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:11,100 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:11,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:11,300 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash -924885707, now seen corresponding path program 75 times [2021-05-22 02:25:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:11,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411705739] [2021-05-22 02:25:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:11,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411705739] [2021-05-22 02:25:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411705739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140385441] [2021-05-22 02:25:11,328 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 [2021-05-22 02:25:11,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:25:11,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:11,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140385441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:11,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:11,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:11,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812643960] [2021-05-22 02:25:11,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:11,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:11,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:11,409 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) [2021-05-22 02:25:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:11,489 INFO L93 Difference]: Finished difference Result 439 states and 1238 transitions. [2021-05-22 02:25:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:11,489 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 [2021-05-22 02:25:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:11,489 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:25:11,489 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:25:11,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:25:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 225. [2021-05-22 02:25:11,492 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) [2021-05-22 02:25:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 682 transitions. [2021-05-22 02:25:11,493 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 682 transitions. Word has length 19 [2021-05-22 02:25:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:11,493 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 682 transitions. [2021-05-22 02:25:11,493 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) [2021-05-22 02:25:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 682 transitions. [2021-05-22 02:25:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:11,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:11,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:11,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-05-22 02:25:11,694 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1412011018, now seen corresponding path program 75 times [2021-05-22 02:25:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:11,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521505343] [2021-05-22 02:25:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:11,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:11,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521505343] [2021-05-22 02:25:11,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521505343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:11,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229297849] [2021-05-22 02:25:11,722 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 [2021-05-22 02:25:11,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:25:11,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:11,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229297849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:11,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:11,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:11,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328345474] [2021-05-22 02:25:11,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:11,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:11,794 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) [2021-05-22 02:25:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:11,877 INFO L93 Difference]: Finished difference Result 458 states and 1317 transitions. [2021-05-22 02:25:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:11,877 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 [2021-05-22 02:25:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:11,878 INFO L225 Difference]: With dead ends: 458 [2021-05-22 02:25:11,878 INFO L226 Difference]: Without dead ends: 458 [2021-05-22 02:25:11,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-22 02:25:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 216. [2021-05-22 02:25:11,880 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) [2021-05-22 02:25:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 652 transitions. [2021-05-22 02:25:11,881 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 652 transitions. Word has length 19 [2021-05-22 02:25:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:11,881 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 652 transitions. [2021-05-22 02:25:11,881 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) [2021-05-22 02:25:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 652 transitions. [2021-05-22 02:25:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:11,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:11,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:12,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:12,082 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:12,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1330770346, now seen corresponding path program 76 times [2021-05-22 02:25:12,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:12,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805781735] [2021-05-22 02:25:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:12,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805781735] [2021-05-22 02:25:12,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805781735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922253023] [2021-05-22 02:25:12,107 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 [2021-05-22 02:25:12,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:12,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922253023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:12,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:12,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:12,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38731143] [2021-05-22 02:25:12,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:12,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:12,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:12,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:12,180 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) [2021-05-22 02:25:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:12,270 INFO L93 Difference]: Finished difference Result 413 states and 1189 transitions. [2021-05-22 02:25:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:12,271 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 [2021-05-22 02:25:12,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:12,271 INFO L225 Difference]: With dead ends: 413 [2021-05-22 02:25:12,271 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:25:12,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:25:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:25:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 216. [2021-05-22 02:25:12,275 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) [2021-05-22 02:25:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-05-22 02:25:12,275 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-05-22 02:25:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:12,275 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-05-22 02:25:12,276 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) [2021-05-22 02:25:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-05-22 02:25:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:12,276 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:12,276 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:12,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:12,493 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:12,493 INFO L82 PathProgramCache]: Analyzing trace with hash -644891147, now seen corresponding path program 76 times [2021-05-22 02:25:12,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:12,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440793597] [2021-05-22 02:25:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:12,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:12,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440793597] [2021-05-22 02:25:12,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440793597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:12,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143919206] [2021-05-22 02:25:12,523 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 [2021-05-22 02:25:12,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:12,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:12,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143919206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:12,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:12,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:12,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705291582] [2021-05-22 02:25:12,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:12,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:12,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:12,605 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) [2021-05-22 02:25:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:12,704 INFO L93 Difference]: Finished difference Result 411 states and 1188 transitions. [2021-05-22 02:25:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:12,704 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 [2021-05-22 02:25:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:12,705 INFO L225 Difference]: With dead ends: 411 [2021-05-22 02:25:12,705 INFO L226 Difference]: Without dead ends: 411 [2021-05-22 02:25:12,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-22 02:25:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 212. [2021-05-22 02:25:12,707 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) [2021-05-22 02:25:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 636 transitions. [2021-05-22 02:25:12,707 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 636 transitions. Word has length 19 [2021-05-22 02:25:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:12,708 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 636 transitions. [2021-05-22 02:25:12,708 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) [2021-05-22 02:25:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 636 transitions. [2021-05-22 02:25:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:12,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:12,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:12,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-05-22 02:25:12,908 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1954614186, now seen corresponding path program 77 times [2021-05-22 02:25:12,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:12,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251556475] [2021-05-22 02:25:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:12,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:12,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251556475] [2021-05-22 02:25:12,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251556475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:12,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:12,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:12,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882006115] [2021-05-22 02:25:12,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:12,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:12,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:12,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:12,934 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) [2021-05-22 02:25:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,007 INFO L93 Difference]: Finished difference Result 384 states and 1100 transitions. [2021-05-22 02:25:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,012 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 [2021-05-22 02:25:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,012 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:25:13,012 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:25:13,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:25:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 222. [2021-05-22 02:25:13,015 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) [2021-05-22 02:25:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 661 transitions. [2021-05-22 02:25:13,015 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 661 transitions. Word has length 19 [2021-05-22 02:25:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,015 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 661 transitions. [2021-05-22 02:25:13,015 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) [2021-05-22 02:25:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 661 transitions. [2021-05-22 02:25:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724 [2021-05-22 02:25:13,016 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash 852700034, now seen corresponding path program 78 times [2021-05-22 02:25:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784969894] [2021-05-22 02:25:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784969894] [2021-05-22 02:25:13,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784969894] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:13,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635717551] [2021-05-22 02:25:13,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:13,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:13,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:13,050 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) [2021-05-22 02:25:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,113 INFO L93 Difference]: Finished difference Result 348 states and 1017 transitions. [2021-05-22 02:25:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,114 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 [2021-05-22 02:25:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,114 INFO L225 Difference]: With dead ends: 348 [2021-05-22 02:25:13,114 INFO L226 Difference]: Without dead ends: 337 [2021-05-22 02:25:13,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-22 02:25:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 212. [2021-05-22 02:25:13,116 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) [2021-05-22 02:25:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 635 transitions. [2021-05-22 02:25:13,117 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 635 transitions. Word has length 19 [2021-05-22 02:25:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,117 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 635 transitions. [2021-05-22 02:25:13,117 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) [2021-05-22 02:25:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 635 transitions. [2021-05-22 02:25:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,117 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,118 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725 [2021-05-22 02:25:13,118 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1616340899, now seen corresponding path program 77 times [2021-05-22 02:25:13,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775362089] [2021-05-22 02:25:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775362089] [2021-05-22 02:25:13,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775362089] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845600504] [2021-05-22 02:25:13,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:13,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:13,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:13,146 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) [2021-05-22 02:25:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,218 INFO L93 Difference]: Finished difference Result 362 states and 1032 transitions. [2021-05-22 02:25:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,219 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 [2021-05-22 02:25:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,219 INFO L225 Difference]: With dead ends: 362 [2021-05-22 02:25:13,219 INFO L226 Difference]: Without dead ends: 356 [2021-05-22 02:25:13,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-22 02:25:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 218. [2021-05-22 02:25:13,221 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) [2021-05-22 02:25:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 649 transitions. [2021-05-22 02:25:13,222 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 649 transitions. Word has length 19 [2021-05-22 02:25:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,222 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 649 transitions. [2021-05-22 02:25:13,222 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) [2021-05-22 02:25:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 649 transitions. [2021-05-22 02:25:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726 [2021-05-22 02:25:13,222 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1345831207, now seen corresponding path program 78 times [2021-05-22 02:25:13,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128147105] [2021-05-22 02:25:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128147105] [2021-05-22 02:25:13,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128147105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:13,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165258563] [2021-05-22 02:25:13,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:13,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:13,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:13,259 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) [2021-05-22 02:25:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,338 INFO L93 Difference]: Finished difference Result 340 states and 995 transitions. [2021-05-22 02:25:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,342 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 [2021-05-22 02:25:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,342 INFO L225 Difference]: With dead ends: 340 [2021-05-22 02:25:13,342 INFO L226 Difference]: Without dead ends: 340 [2021-05-22 02:25:13,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-22 02:25:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 195. [2021-05-22 02:25:13,345 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) [2021-05-22 02:25:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 579 transitions. [2021-05-22 02:25:13,345 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 579 transitions. Word has length 19 [2021-05-22 02:25:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,345 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 579 transitions. [2021-05-22 02:25:13,345 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) [2021-05-22 02:25:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 579 transitions. [2021-05-22 02:25:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727 [2021-05-22 02:25:13,345 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -494336067, now seen corresponding path program 79 times [2021-05-22 02:25:13,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622284812] [2021-05-22 02:25:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622284812] [2021-05-22 02:25:13,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622284812] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:13,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370332522] [2021-05-22 02:25:13,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:13,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:13,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:13,374 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) [2021-05-22 02:25:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,438 INFO L93 Difference]: Finished difference Result 335 states and 937 transitions. [2021-05-22 02:25:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,439 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 [2021-05-22 02:25:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,439 INFO L225 Difference]: With dead ends: 335 [2021-05-22 02:25:13,439 INFO L226 Difference]: Without dead ends: 327 [2021-05-22 02:25:13,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-22 02:25:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 212. [2021-05-22 02:25:13,441 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) [2021-05-22 02:25:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 626 transitions. [2021-05-22 02:25:13,442 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 626 transitions. Word has length 19 [2021-05-22 02:25:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,442 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 626 transitions. [2021-05-22 02:25:13,442 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) [2021-05-22 02:25:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 626 transitions. [2021-05-22 02:25:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,442 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728 [2021-05-22 02:25:13,442 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash -113598427, now seen corresponding path program 80 times [2021-05-22 02:25:13,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313237671] [2021-05-22 02:25:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313237671] [2021-05-22 02:25:13,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313237671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:13,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135747700] [2021-05-22 02:25:13,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:13,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:13,468 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) [2021-05-22 02:25:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,538 INFO L93 Difference]: Finished difference Result 333 states and 932 transitions. [2021-05-22 02:25:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,539 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 [2021-05-22 02:25:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,539 INFO L225 Difference]: With dead ends: 333 [2021-05-22 02:25:13,539 INFO L226 Difference]: Without dead ends: 325 [2021-05-22 02:25:13,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-22 02:25:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 210. [2021-05-22 02:25:13,541 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) [2021-05-22 02:25:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 619 transitions. [2021-05-22 02:25:13,542 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 619 transitions. Word has length 19 [2021-05-22 02:25:13,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,542 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 619 transitions. [2021-05-22 02:25:13,542 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) [2021-05-22 02:25:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 619 transitions. [2021-05-22 02:25:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,542 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729 [2021-05-22 02:25:13,542 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,542 INFO L82 PathProgramCache]: Analyzing trace with hash 483738231, now seen corresponding path program 81 times [2021-05-22 02:25:13,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967242593] [2021-05-22 02:25:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967242593] [2021-05-22 02:25:13,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967242593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:13,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:13,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:13,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108148304] [2021-05-22 02:25:13,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:13,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:13,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:13,566 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) [2021-05-22 02:25:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,624 INFO L93 Difference]: Finished difference Result 347 states and 973 transitions. [2021-05-22 02:25:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,624 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 [2021-05-22 02:25:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,624 INFO L225 Difference]: With dead ends: 347 [2021-05-22 02:25:13,624 INFO L226 Difference]: Without dead ends: 333 [2021-05-22 02:25:13,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-22 02:25:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 208. [2021-05-22 02:25:13,627 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) [2021-05-22 02:25:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-22 02:25:13,627 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-22 02:25:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,628 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-22 02:25:13,628 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) [2021-05-22 02:25:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-22 02:25:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,628 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:13,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable730 [2021-05-22 02:25:13,628 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1339481934, now seen corresponding path program 79 times [2021-05-22 02:25:13,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:13,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098178273] [2021-05-22 02:25:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098178273] [2021-05-22 02:25:13,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098178273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:13,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735710202] [2021-05-22 02:25:13,659 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 [2021-05-22 02:25:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735710202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:13,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:13,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:13,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026446771] [2021-05-22 02:25:13,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:13,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:13,740 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) [2021-05-22 02:25:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,830 INFO L93 Difference]: Finished difference Result 388 states and 1116 transitions. [2021-05-22 02:25:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:13,830 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 [2021-05-22 02:25:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,831 INFO L225 Difference]: With dead ends: 388 [2021-05-22 02:25:13,831 INFO L226 Difference]: Without dead ends: 388 [2021-05-22 02:25:13,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:25:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-22 02:25:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 214. [2021-05-22 02:25:13,833 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) [2021-05-22 02:25:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 637 transitions. [2021-05-22 02:25:13,833 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 637 transitions. Word has length 19 [2021-05-22 02:25:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,833 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 637 transitions. [2021-05-22 02:25:13,833 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) [2021-05-22 02:25:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 637 transitions. [2021-05-22 02:25:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,834 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,834 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:14,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable731,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:14,034 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2025324186, now seen corresponding path program 80 times [2021-05-22 02:25:14,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:14,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144926178] [2021-05-22 02:25:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144926178] [2021-05-22 02:25:14,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144926178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919238921] [2021-05-22 02:25:14,062 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 [2021-05-22 02:25:14,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:14,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:14,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919238921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:14,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:14,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:14,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318928834] [2021-05-22 02:25:14,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:14,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:14,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:14,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:14,147 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) [2021-05-22 02:25:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:14,223 INFO L93 Difference]: Finished difference Result 382 states and 1089 transitions. [2021-05-22 02:25:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:14,223 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 [2021-05-22 02:25:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:14,224 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:25:14,224 INFO L226 Difference]: Without dead ends: 376 [2021-05-22 02:25:14,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:25:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-22 02:25:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 211. [2021-05-22 02:25:14,226 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) [2021-05-22 02:25:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 625 transitions. [2021-05-22 02:25:14,227 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 625 transitions. Word has length 19 [2021-05-22 02:25:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:14,227 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 625 transitions. [2021-05-22 02:25:14,227 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) [2021-05-22 02:25:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 625 transitions. [2021-05-22 02:25:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:14,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:14,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:14,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-05-22 02:25:14,428 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1256950578, now seen corresponding path program 81 times [2021-05-22 02:25:14,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:14,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497934364] [2021-05-22 02:25:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:14,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497934364] [2021-05-22 02:25:14,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497934364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:14,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253079788] [2021-05-22 02:25:14,452 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 [2021-05-22 02:25:14,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:25:14,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253079788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:14,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:14,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:25:14,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289524563] [2021-05-22 02:25:14,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:25:14,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:25:14,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:14,522 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) [2021-05-22 02:25:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:14,596 INFO L93 Difference]: Finished difference Result 370 states and 1047 transitions. [2021-05-22 02:25:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:14,596 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 [2021-05-22 02:25:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:14,597 INFO L225 Difference]: With dead ends: 370 [2021-05-22 02:25:14,597 INFO L226 Difference]: Without dead ends: 358 [2021-05-22 02:25:14,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-22 02:25:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 208. [2021-05-22 02:25:14,599 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) [2021-05-22 02:25:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-22 02:25:14,600 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-22 02:25:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:14,600 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-22 02:25:14,600 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) [2021-05-22 02:25:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-22 02:25:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:14,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:14,600 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:14,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:14,801 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1258244423, now seen corresponding path program 82 times [2021-05-22 02:25:14,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:14,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244478472] [2021-05-22 02:25:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244478472] [2021-05-22 02:25:14,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244478472] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:14,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:14,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:14,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039726365] [2021-05-22 02:25:14,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:14,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:14,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:14,839 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) [2021-05-22 02:25:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:14,929 INFO L93 Difference]: Finished difference Result 371 states and 1007 transitions. [2021-05-22 02:25:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:14,930 INFO L225 Difference]: With dead ends: 371 [2021-05-22 02:25:14,930 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 02:25:14,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 02:25:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 218. [2021-05-22 02:25:14,933 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) [2021-05-22 02:25:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 648 transitions. [2021-05-22 02:25:14,933 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 648 transitions. Word has length 19 [2021-05-22 02:25:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:14,933 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 648 transitions. [2021-05-22 02:25:14,934 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) [2021-05-22 02:25:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 648 transitions. [2021-05-22 02:25:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:14,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:14,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:14,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738 [2021-05-22 02:25:14,934 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -877506783, now seen corresponding path program 83 times [2021-05-22 02:25:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:14,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525993664] [2021-05-22 02:25:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:14,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525993664] [2021-05-22 02:25:14,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525993664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:14,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:14,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:14,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411512769] [2021-05-22 02:25:14,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:14,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:14,971 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) [2021-05-22 02:25:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:15,061 INFO L93 Difference]: Finished difference Result 377 states and 1022 transitions. [2021-05-22 02:25:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:15,061 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 [2021-05-22 02:25:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:15,061 INFO L225 Difference]: With dead ends: 377 [2021-05-22 02:25:15,061 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:25:15,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:25:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 220. [2021-05-22 02:25:15,065 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) [2021-05-22 02:25:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 652 transitions. [2021-05-22 02:25:15,065 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 652 transitions. Word has length 19 [2021-05-22 02:25:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:15,065 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 652 transitions. [2021-05-22 02:25:15,065 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) [2021-05-22 02:25:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 652 transitions. [2021-05-22 02:25:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:15,066 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:15,066 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:15,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739 [2021-05-22 02:25:15,066 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:15,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:15,066 INFO L82 PathProgramCache]: Analyzing trace with hash 674118506, now seen corresponding path program 82 times [2021-05-22 02:25:15,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:15,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086063421] [2021-05-22 02:25:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:15,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:15,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086063421] [2021-05-22 02:25:15,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086063421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:15,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768421201] [2021-05-22 02:25:15,107 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 [2021-05-22 02:25:15,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:15,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:15,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:15,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768421201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:15,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:15,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:15,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322223710] [2021-05-22 02:25:15,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:15,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:15,211 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) [2021-05-22 02:25:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:15,335 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-05-22 02:25:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:15,335 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 [2021-05-22 02:25:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:15,335 INFO L225 Difference]: With dead ends: 433 [2021-05-22 02:25:15,335 INFO L226 Difference]: Without dead ends: 433 [2021-05-22 02:25:15,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-22 02:25:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 226. [2021-05-22 02:25:15,338 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) [2021-05-22 02:25:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 679 transitions. [2021-05-22 02:25:15,338 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 679 transitions. Word has length 19 [2021-05-22 02:25:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:15,338 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 679 transitions. [2021-05-22 02:25:15,338 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) [2021-05-22 02:25:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 679 transitions. [2021-05-22 02:25:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:15,339 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:15,339 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:15,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-05-22 02:25:15,539 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1604279682, now seen corresponding path program 83 times [2021-05-22 02:25:15,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:15,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700403488] [2021-05-22 02:25:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:15,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:15,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700403488] [2021-05-22 02:25:15,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700403488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:15,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183759416] [2021-05-22 02:25:15,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:25:15,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:15,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:15,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:15,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183759416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:15,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:15,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889525758] [2021-05-22 02:25:15,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:15,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:15,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:15,691 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) [2021-05-22 02:25:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:15,789 INFO L93 Difference]: Finished difference Result 415 states and 1158 transitions. [2021-05-22 02:25:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:15,790 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 [2021-05-22 02:25:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:15,790 INFO L225 Difference]: With dead ends: 415 [2021-05-22 02:25:15,790 INFO L226 Difference]: Without dead ends: 409 [2021-05-22 02:25:15,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-22 02:25:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 225. [2021-05-22 02:25:15,794 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) [2021-05-22 02:25:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 674 transitions. [2021-05-22 02:25:15,794 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 674 transitions. Word has length 19 [2021-05-22 02:25:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:15,794 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 674 transitions. [2021-05-22 02:25:15,794 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) [2021-05-22 02:25:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 674 transitions. [2021-05-22 02:25:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:15,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:15,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:16,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-05-22 02:25:16,016 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1462378563, now seen corresponding path program 84 times [2021-05-22 02:25:16,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:16,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127706912] [2021-05-22 02:25:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:16,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:16,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127706912] [2021-05-22 02:25:16,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127706912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:16,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203751414] [2021-05-22 02:25:16,050 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 [2021-05-22 02:25:16,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:25:16,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:16,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:16,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203751414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:16,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:16,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:16,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399304077] [2021-05-22 02:25:16,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:16,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:16,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:16,161 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) [2021-05-22 02:25:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:16,263 INFO L93 Difference]: Finished difference Result 343 states and 948 transitions. [2021-05-22 02:25:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:16,263 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 [2021-05-22 02:25:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:16,264 INFO L225 Difference]: With dead ends: 343 [2021-05-22 02:25:16,264 INFO L226 Difference]: Without dead ends: 335 [2021-05-22 02:25:16,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-22 02:25:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 222. [2021-05-22 02:25:16,267 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) [2021-05-22 02:25:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 663 transitions. [2021-05-22 02:25:16,268 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 663 transitions. Word has length 19 [2021-05-22 02:25:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:16,268 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 663 transitions. [2021-05-22 02:25:16,268 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) [2021-05-22 02:25:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 663 transitions. [2021-05-22 02:25:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:16,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:16,268 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:16,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:16,489 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash 874518162, now seen corresponding path program 84 times [2021-05-22 02:25:16,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:16,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151358604] [2021-05-22 02:25:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:16,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151358604] [2021-05-22 02:25:16,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151358604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265390707] [2021-05-22 02:25:16,529 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 [2021-05-22 02:25:16,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:25:16,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:16,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:16,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265390707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:16,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:16,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:16,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781658696] [2021-05-22 02:25:16,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:16,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:16,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:16,664 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) [2021-05-22 02:25:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:16,769 INFO L93 Difference]: Finished difference Result 360 states and 1019 transitions. [2021-05-22 02:25:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:16,770 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 [2021-05-22 02:25:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:16,770 INFO L225 Difference]: With dead ends: 360 [2021-05-22 02:25:16,770 INFO L226 Difference]: Without dead ends: 360 [2021-05-22 02:25:16,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-22 02:25:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 213. [2021-05-22 02:25:16,773 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) [2021-05-22 02:25:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 633 transitions. [2021-05-22 02:25:16,774 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 633 transitions. Word has length 19 [2021-05-22 02:25:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:16,774 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 633 transitions. [2021-05-22 02:25:16,774 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) [2021-05-22 02:25:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 633 transitions. [2021-05-22 02:25:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:16,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:16,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:16,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-05-22 02:25:16,991 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash 793277490, now seen corresponding path program 85 times [2021-05-22 02:25:16,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:16,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060988724] [2021-05-22 02:25:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060988724] [2021-05-22 02:25:17,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060988724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45604539] [2021-05-22 02:25:17,027 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 [2021-05-22 02:25:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45604539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:17,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:17,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770033348] [2021-05-22 02:25:17,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:17,130 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) [2021-05-22 02:25:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:17,230 INFO L93 Difference]: Finished difference Result 315 states and 891 transitions. [2021-05-22 02:25:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:17,230 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 [2021-05-22 02:25:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:17,231 INFO L225 Difference]: With dead ends: 315 [2021-05-22 02:25:17,231 INFO L226 Difference]: Without dead ends: 306 [2021-05-22 02:25:17,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-22 02:25:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 213. [2021-05-22 02:25:17,234 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) [2021-05-22 02:25:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-05-22 02:25:17,234 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 19 [2021-05-22 02:25:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:17,234 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-05-22 02:25:17,234 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) [2021-05-22 02:25:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-05-22 02:25:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:17,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:17,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:17,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:17,456 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1182384003, now seen corresponding path program 85 times [2021-05-22 02:25:17,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:17,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238896859] [2021-05-22 02:25:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238896859] [2021-05-22 02:25:17,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238896859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838356156] [2021-05-22 02:25:17,502 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 [2021-05-22 02:25:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:25:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838356156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:17,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:17,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:25:17,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136872122] [2021-05-22 02:25:17,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:25:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:17,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:25:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:17,606 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) [2021-05-22 02:25:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:17,708 INFO L93 Difference]: Finished difference Result 302 states and 860 transitions. [2021-05-22 02:25:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:17,708 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 [2021-05-22 02:25:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:17,708 INFO L225 Difference]: With dead ends: 302 [2021-05-22 02:25:17,708 INFO L226 Difference]: Without dead ends: 302 [2021-05-22 02:25:17,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:25:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-22 02:25:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2021-05-22 02:25:17,711 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) [2021-05-22 02:25:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 617 transitions. [2021-05-22 02:25:17,712 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 617 transitions. Word has length 19 [2021-05-22 02:25:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:17,712 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 617 transitions. [2021-05-22 02:25:17,712 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) [2021-05-22 02:25:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 617 transitions. [2021-05-22 02:25:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:17,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:17,713 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:17,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-05-22 02:25:17,934 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1417121330, now seen corresponding path program 86 times [2021-05-22 02:25:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:17,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814875169] [2021-05-22 02:25:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:17,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814875169] [2021-05-22 02:25:17,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814875169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:17,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:17,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887113853] [2021-05-22 02:25:17,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:17,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:17,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:17,974 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) [2021-05-22 02:25:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,167 INFO L93 Difference]: Finished difference Result 353 states and 973 transitions. [2021-05-22 02:25:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,168 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 [2021-05-22 02:25:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,169 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:25:18,169 INFO L226 Difference]: Without dead ends: 347 [2021-05-22 02:25:18,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-22 02:25:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 219. [2021-05-22 02:25:18,172 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) [2021-05-22 02:25:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 642 transitions. [2021-05-22 02:25:18,173 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 642 transitions. Word has length 19 [2021-05-22 02:25:18,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,173 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 642 transitions. [2021-05-22 02:25:18,173 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) [2021-05-22 02:25:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 642 transitions. [2021-05-22 02:25:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,175 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752 [2021-05-22 02:25:18,176 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,180 INFO L82 PathProgramCache]: Analyzing trace with hash 315207178, now seen corresponding path program 87 times [2021-05-22 02:25:18,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553665852] [2021-05-22 02:25:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553665852] [2021-05-22 02:25:18,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553665852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:18,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980197736] [2021-05-22 02:25:18,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:18,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:18,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:18,228 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) [2021-05-22 02:25:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,339 INFO L93 Difference]: Finished difference Result 317 states and 890 transitions. [2021-05-22 02:25:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,340 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 [2021-05-22 02:25:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,340 INFO L225 Difference]: With dead ends: 317 [2021-05-22 02:25:18,340 INFO L226 Difference]: Without dead ends: 306 [2021-05-22 02:25:18,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-22 02:25:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 209. [2021-05-22 02:25:18,343 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) [2021-05-22 02:25:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 616 transitions. [2021-05-22 02:25:18,344 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 616 transitions. Word has length 19 [2021-05-22 02:25:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,344 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 616 transitions. [2021-05-22 02:25:18,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 616 transitions. [2021-05-22 02:25:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753 [2021-05-22 02:25:18,344 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2141133541, now seen corresponding path program 86 times [2021-05-22 02:25:18,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958109981] [2021-05-22 02:25:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958109981] [2021-05-22 02:25:18,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958109981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:18,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490091110] [2021-05-22 02:25:18,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:18,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:18,374 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) [2021-05-22 02:25:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,447 INFO L93 Difference]: Finished difference Result 353 states and 981 transitions. [2021-05-22 02:25:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,447 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 [2021-05-22 02:25:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,448 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:25:18,448 INFO L226 Difference]: Without dead ends: 347 [2021-05-22 02:25:18,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-22 02:25:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 221. [2021-05-22 02:25:18,450 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) [2021-05-22 02:25:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 653 transitions. [2021-05-22 02:25:18,451 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 653 transitions. Word has length 19 [2021-05-22 02:25:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,451 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 653 transitions. [2021-05-22 02:25:18,451 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) [2021-05-22 02:25:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 653 transitions. [2021-05-22 02:25:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,451 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754 [2021-05-22 02:25:18,451 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1883324063, now seen corresponding path program 87 times [2021-05-22 02:25:18,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463288496] [2021-05-22 02:25:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463288496] [2021-05-22 02:25:18,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463288496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:18,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50884285] [2021-05-22 02:25:18,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:18,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:18,482 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) [2021-05-22 02:25:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,559 INFO L93 Difference]: Finished difference Result 331 states and 944 transitions. [2021-05-22 02:25:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,559 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 [2021-05-22 02:25:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,559 INFO L225 Difference]: With dead ends: 331 [2021-05-22 02:25:18,560 INFO L226 Difference]: Without dead ends: 331 [2021-05-22 02:25:18,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-22 02:25:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 208. [2021-05-22 02:25:18,562 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) [2021-05-22 02:25:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-22 02:25:18,562 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-22 02:25:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,562 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-22 02:25:18,562 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) [2021-05-22 02:25:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-22 02:25:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755 [2021-05-22 02:25:18,563 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,563 INFO L82 PathProgramCache]: Analyzing trace with hash -249991038, now seen corresponding path program 88 times [2021-05-22 02:25:18,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013329226] [2021-05-22 02:25:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013329226] [2021-05-22 02:25:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013329226] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2290195] [2021-05-22 02:25:18,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:18,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:18,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:18,586 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) [2021-05-22 02:25:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,671 INFO L93 Difference]: Finished difference Result 292 states and 822 transitions. [2021-05-22 02:25:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,671 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 [2021-05-22 02:25:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,672 INFO L225 Difference]: With dead ends: 292 [2021-05-22 02:25:18,672 INFO L226 Difference]: Without dead ends: 280 [2021-05-22 02:25:18,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-22 02:25:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 210. [2021-05-22 02:25:18,674 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) [2021-05-22 02:25:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 616 transitions. [2021-05-22 02:25:18,674 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 616 transitions. Word has length 19 [2021-05-22 02:25:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,674 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 616 transitions. [2021-05-22 02:25:18,674 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) [2021-05-22 02:25:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 616 transitions. [2021-05-22 02:25:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable756 [2021-05-22 02:25:18,675 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash 144187622, now seen corresponding path program 89 times [2021-05-22 02:25:18,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915696767] [2021-05-22 02:25:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915696767] [2021-05-22 02:25:18,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915696767] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:18,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217885991] [2021-05-22 02:25:18,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:18,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:18,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:18,700 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) [2021-05-22 02:25:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,797 INFO L93 Difference]: Finished difference Result 280 states and 784 transitions. [2021-05-22 02:25:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,797 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 [2021-05-22 02:25:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,797 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:25:18,797 INFO L226 Difference]: Without dead ends: 274 [2021-05-22 02:25:18,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-22 02:25:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 220. [2021-05-22 02:25:18,800 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) [2021-05-22 02:25:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-05-22 02:25:18,800 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 19 [2021-05-22 02:25:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,800 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-05-22 02:25:18,800 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) [2021-05-22 02:25:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-05-22 02:25:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757 [2021-05-22 02:25:18,800 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash -957726530, now seen corresponding path program 90 times [2021-05-22 02:25:18,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568211533] [2021-05-22 02:25:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568211533] [2021-05-22 02:25:18,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568211533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:18,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515138513] [2021-05-22 02:25:18,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:18,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:18,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:18,826 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) [2021-05-22 02:25:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,907 INFO L93 Difference]: Finished difference Result 244 states and 701 transitions. [2021-05-22 02:25:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,907 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 [2021-05-22 02:25:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,907 INFO L225 Difference]: With dead ends: 244 [2021-05-22 02:25:18,907 INFO L226 Difference]: Without dead ends: 231 [2021-05-22 02:25:18,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:25:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-22 02:25:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2021-05-22 02:25:18,909 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) [2021-05-22 02:25:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 612 transitions. [2021-05-22 02:25:18,909 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 612 transitions. Word has length 19 [2021-05-22 02:25:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,909 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 612 transitions. [2021-05-22 02:25:18,910 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) [2021-05-22 02:25:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 612 transitions. [2021-05-22 02:25:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758 [2021-05-22 02:25:18,910 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,910 INFO L82 PathProgramCache]: Analyzing trace with hash -427692237, now seen corresponding path program 88 times [2021-05-22 02:25:18,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687528854] [2021-05-22 02:25:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687528854] [2021-05-22 02:25:18,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687528854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:18,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:18,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:18,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896531431] [2021-05-22 02:25:18,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:18,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:18,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:18,934 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) [2021-05-22 02:25:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,993 INFO L93 Difference]: Finished difference Result 277 states and 780 transitions. [2021-05-22 02:25:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,994 INFO L225 Difference]: With dead ends: 277 [2021-05-22 02:25:18,994 INFO L226 Difference]: Without dead ends: 265 [2021-05-22 02:25:18,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-22 02:25:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 208. [2021-05-22 02:25:18,996 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) [2021-05-22 02:25:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 611 transitions. [2021-05-22 02:25:18,997 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 611 transitions. Word has length 19 [2021-05-22 02:25:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,997 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 611 transitions. [2021-05-22 02:25:18,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 611 transitions. [2021-05-22 02:25:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,997 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759 [2021-05-22 02:25:18,997 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash 656044215, now seen corresponding path program 89 times [2021-05-22 02:25:18,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276809866] [2021-05-22 02:25:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:19,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:19,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276809866] [2021-05-22 02:25:19,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276809866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:19,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:19,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271421684] [2021-05-22 02:25:19,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:19,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:19,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:19,025 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) [2021-05-22 02:25:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:19,091 INFO L93 Difference]: Finished difference Result 281 states and 792 transitions. [2021-05-22 02:25:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:19,091 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 [2021-05-22 02:25:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:19,091 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:25:19,091 INFO L226 Difference]: Without dead ends: 275 [2021-05-22 02:25:19,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:25:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-05-22 02:25:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 214. [2021-05-22 02:25:19,094 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) [2021-05-22 02:25:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 625 transitions. [2021-05-22 02:25:19,094 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 625 transitions. Word has length 19 [2021-05-22 02:25:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:19,094 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 625 transitions. [2021-05-22 02:25:19,094 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) [2021-05-22 02:25:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 625 transitions. [2021-05-22 02:25:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:19,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:19,094 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:19,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760 [2021-05-22 02:25:19,094 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash 926553907, now seen corresponding path program 90 times [2021-05-22 02:25:19,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:19,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512154224] [2021-05-22 02:25:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:19,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:19,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512154224] [2021-05-22 02:25:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512154224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:19,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:19,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-22 02:25:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760047311] [2021-05-22 02:25:19,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:19,126 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) [2021-05-22 02:25:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:19,195 INFO L93 Difference]: Finished difference Result 246 states and 717 transitions. [2021-05-22 02:25:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:19,195 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 [2021-05-22 02:25:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:19,196 INFO L225 Difference]: With dead ends: 246 [2021-05-22 02:25:19,196 INFO L226 Difference]: Without dead ends: 246 [2021-05-22 02:25:19,196 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 [2021-05-22 02:25:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-22 02:25:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 189. [2021-05-22 02:25:19,198 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) [2021-05-22 02:25:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-05-22 02:25:19,198 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-05-22 02:25:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:19,198 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-05-22 02:25:19,198 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) [2021-05-22 02:25:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-05-22 02:25:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:25:19,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:19,198 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:19,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable761 [2021-05-22 02:25:19,198 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash 92049292, now seen corresponding path program 1 times [2021-05-22 02:25:19,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:19,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499322739] [2021-05-22 02:25:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:19,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499322739] [2021-05-22 02:25:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499322739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977784464] [2021-05-22 02:25:19,702 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 [2021-05-22 02:25:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:25:19,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:19,784 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:25:19,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-05-22 02:25:19,997 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:25:20,001 INFO L168 Benchmark]: Toolchain (without parser) took 127697.19 ms. Allocated memory was 348.1 MB in the beginning and 536.9 MB in the end (delta: 188.7 MB). Free memory was 327.3 MB in the beginning and 463.3 MB in the end (delta: -136.0 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:20,001 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory is still 328.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:20,001 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.05 ms. Allocated memory is still 348.1 MB. Free memory was 327.1 MB in the beginning and 325.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:20,001 INFO L168 Benchmark]: Boogie Preprocessor took 21.52 ms. Allocated memory is still 348.1 MB. Free memory was 325.7 MB in the beginning and 324.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:20,002 INFO L168 Benchmark]: RCFGBuilder took 421.11 ms. Allocated memory is still 348.1 MB. Free memory was 324.5 MB in the beginning and 325.2 MB in the end (delta: -715.1 kB). Peak memory consumption was 19.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:20,002 INFO L168 Benchmark]: TraceAbstraction took 127223.78 ms. Allocated memory was 348.1 MB in the beginning and 536.9 MB in the end (delta: 188.7 MB). Free memory was 325.2 MB in the beginning and 463.3 MB in the end (delta: -138.0 MB). Peak memory consumption was 51.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:20,002 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory is still 328.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.05 ms. Allocated memory is still 348.1 MB. Free memory was 327.1 MB in the beginning and 325.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.52 ms. Allocated memory is still 348.1 MB. Free memory was 325.7 MB in the beginning and 324.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 421.11 ms. Allocated memory is still 348.1 MB. Free memory was 324.5 MB in the beginning and 325.2 MB in the end (delta: -715.1 kB). Peak memory consumption was 19.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 127223.78 ms. Allocated memory was 348.1 MB in the beginning and 536.9 MB in the end (delta: 188.7 MB). Free memory was 325.2 MB in the beginning and 463.3 MB in the end (delta: -138.0 MB). Peak memory consumption was 51.7 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...