/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:15:54,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:15:54,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:15:54,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:15:54,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:15:54,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:15:54,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:15:54,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:15:54,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:15:54,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:15:54,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:15:54,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:15:54,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:15:54,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:15:54,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:15:54,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:15:54,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:15:54,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:15:54,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:15:54,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:15:54,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:15:54,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:15:54,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:15:54,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:15:54,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:15:54,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:15:54,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:15:54,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:15:54,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:15:54,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:15:54,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:15:54,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:15:54,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:15:54,858 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:15:54,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:15:54,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:15:54,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:15:54,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:15:54,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:15:54,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:15:54,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:15:54,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:15:54,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:15:54,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:15:54,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:15:54,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:15:54,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:15:54,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:15:54,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:15:54,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:15:54,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:54,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:15:54,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:15:54,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:15:54,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:15:54,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:15:54,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:15:54,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:15:54,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:15:55,132 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:15:55,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:15:55,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:15:55,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:15:55,157 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:15:55,158 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-07-17 12:15:55,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e0c8a52/a8d0b612a15140aca75e9a8957185dcd/FLAG67b0d1eab [2020-07-17 12:15:55,695 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:15:55,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-07-17 12:15:55,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e0c8a52/a8d0b612a15140aca75e9a8957185dcd/FLAG67b0d1eab [2020-07-17 12:15:56,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e0c8a52/a8d0b612a15140aca75e9a8957185dcd [2020-07-17 12:15:56,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:15:56,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:15:56,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:56,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:15:56,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:15:56,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317546e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56, skipping insertion in model container [2020-07-17 12:15:56,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:15:56,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:15:56,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:56,329 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:15:56,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:56,358 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:15:56,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56 WrapperNode [2020-07-17 12:15:56,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:56,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:15:56,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:15:56,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:15:56,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (1/1) ... [2020-07-17 12:15:56,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:15:56,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:15:56,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:15:56,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:15:56,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (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 [2020-07-17 12:15:56,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:15:56,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:15:56,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:15:56,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:15:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:15:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:15:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:15:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:15:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:15:56,690 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:15:56,691 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:15:56,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:56 BoogieIcfgContainer [2020-07-17 12:15:56,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:15:56,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:15:56,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:15:56,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:15:56,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:15:56" (1/3) ... [2020-07-17 12:15:56,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24911a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:56, skipping insertion in model container [2020-07-17 12:15:56,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:56" (2/3) ... [2020-07-17 12:15:56,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24911a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:56, skipping insertion in model container [2020-07-17 12:15:56,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:56" (3/3) ... [2020-07-17 12:15:56,702 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-07-17 12:15:56,711 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:15:56,717 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:15:56,729 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:15:56,749 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:15:56,749 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:15:56,749 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:15:56,749 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:15:56,750 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:15:56,750 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:15:56,750 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:15:56,750 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:15:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-17 12:15:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:15:56,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:56,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:56,771 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:56,776 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-07-17 12:15:56,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:56,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381062613] [2020-07-17 12:15:56,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:56,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381062613] [2020-07-17 12:15:56,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:56,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:15:56,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125983682] [2020-07-17 12:15:56,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:15:56,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:56,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:15:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:15:56,895 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-17 12:15:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:56,912 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-17 12:15:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:15:56,914 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 12:15:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:56,921 INFO L225 Difference]: With dead ends: 30 [2020-07-17 12:15:56,921 INFO L226 Difference]: Without dead ends: 13 [2020-07-17 12:15:56,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:15:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-17 12:15:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-17 12:15:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-17 12:15:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-17 12:15:56,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-17 12:15:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:56,954 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-17 12:15:56,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:15:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-17 12:15:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:15:56,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:56,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:56,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:15:56,956 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-07-17 12:15:56,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:56,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331767594] [2020-07-17 12:15:56,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331767594] [2020-07-17 12:15:57,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:57,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:15:57,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100422185] [2020-07-17 12:15:57,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:15:57,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:57,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:15:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:57,011 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-07-17 12:15:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:57,085 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-07-17 12:15:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:15:57,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-17 12:15:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:57,087 INFO L225 Difference]: With dead ends: 24 [2020-07-17 12:15:57,087 INFO L226 Difference]: Without dead ends: 16 [2020-07-17 12:15:57,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-17 12:15:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-17 12:15:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-17 12:15:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-17 12:15:57,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-17 12:15:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:57,099 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-17 12:15:57,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:15:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-17 12:15:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 12:15:57,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:57,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:57,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:15:57,109 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-07-17 12:15:57,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:57,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167255483] [2020-07-17 12:15:57,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167255483] [2020-07-17 12:15:57,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500029468] [2020-07-17 12:15:57,162 INFO L94 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 [2020-07-17 12:15:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-17 12:15:57,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:57,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-17 12:15:57,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735479804] [2020-07-17 12:15:57,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:15:57,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:57,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:15:57,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:15:57,235 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-07-17 12:15:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:57,283 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-07-17 12:15:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:15:57,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-17 12:15:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:57,285 INFO L225 Difference]: With dead ends: 27 [2020-07-17 12:15:57,285 INFO L226 Difference]: Without dead ends: 19 [2020-07-17 12:15:57,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:15:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-17 12:15:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-07-17 12:15:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 12:15:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-17 12:15:57,291 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-17 12:15:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:57,292 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-17 12:15:57,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:15:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-17 12:15:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 12:15:57,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:57,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:57,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:15:57,495 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:57,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-07-17 12:15:57,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:57,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016814878] [2020-07-17 12:15:57,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016814878] [2020-07-17 12:15:57,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225687251] [2020-07-17 12:15:57,557 INFO L92 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 [2020-07-17 12:15:57,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:57,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:57,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 12:15:57,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:57,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:57,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-17 12:15:57,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500941831] [2020-07-17 12:15:57,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:15:57,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:15:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:15:57,602 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-07-17 12:15:57,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:57,642 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-17 12:15:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:15:57,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-17 12:15:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:57,644 INFO L225 Difference]: With dead ends: 30 [2020-07-17 12:15:57,645 INFO L226 Difference]: Without dead ends: 22 [2020-07-17 12:15:57,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:15:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-17 12:15:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-17 12:15:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 12:15:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-17 12:15:57,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-07-17 12:15:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:57,653 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-17 12:15:57,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:15:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-17 12:15:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 12:15:57,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:57,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:57,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:57,868 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:57,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:57,869 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 3 times [2020-07-17 12:15:57,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:57,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015274973] [2020-07-17 12:15:57,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:15:57,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015274973] [2020-07-17 12:15:57,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:57,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:15:57,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949609084] [2020-07-17 12:15:57,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:15:57,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:15:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:15:57,910 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-07-17 12:15:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:57,947 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-17 12:15:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:15:57,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-17 12:15:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:57,949 INFO L225 Difference]: With dead ends: 30 [2020-07-17 12:15:57,949 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 12:15:57,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:15:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 12:15:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-07-17 12:15:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 12:15:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-17 12:15:57,960 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-07-17 12:15:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:57,961 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-17 12:15:57,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:15:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-17 12:15:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:15:57,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:57,962 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:57,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:15:57,962 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2020-07-17 12:15:57,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:57,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762084468] [2020-07-17 12:15:57,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:15:58,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762084468] [2020-07-17 12:15:58,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431154720] [2020-07-17 12:15:58,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2020-07-17 12:15:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:58,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:58,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:58,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2020-07-17 12:15:58,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366812803] [2020-07-17 12:15:58,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:15:58,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:58,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:15:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:15:58,080 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-17 12:15:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:58,124 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-17 12:15:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:15:58,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-17 12:15:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:58,127 INFO L225 Difference]: With dead ends: 33 [2020-07-17 12:15:58,127 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 12:15:58,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:15:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 12:15:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-17 12:15:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-17 12:15:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-07-17 12:15:58,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-07-17 12:15:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:58,136 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-07-17 12:15:58,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:15:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-07-17 12:15:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:15:58,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:58,138 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:58,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:58,352 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 2 times [2020-07-17 12:15:58,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:58,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017719292] [2020-07-17 12:15:58,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:15:58,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017719292] [2020-07-17 12:15:58,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906115245] [2020-07-17 12:15:58,422 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2020-07-17 12:15:58,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:58,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:58,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 12:15:58,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:58,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:58,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 8 [2020-07-17 12:15:58,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940054398] [2020-07-17 12:15:58,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:15:58,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:15:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:15:58,499 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-07-17 12:15:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:58,562 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-17 12:15:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:15:58,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-17 12:15:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:58,564 INFO L225 Difference]: With dead ends: 36 [2020-07-17 12:15:58,565 INFO L226 Difference]: Without dead ends: 31 [2020-07-17 12:15:58,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:15:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-17 12:15:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-17 12:15:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-17 12:15:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-17 12:15:58,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-17 12:15:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:58,577 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-17 12:15:58,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:15:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-17 12:15:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:15:58,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:58,580 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:58,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:58,795 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 3 times [2020-07-17 12:15:58,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:58,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158634093] [2020-07-17 12:15:58,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:15:58,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158634093] [2020-07-17 12:15:58,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651496770] [2020-07-17 12:15:58,852 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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) [2020-07-17 12:15:58,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-07-17 12:15:58,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:58,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:15:58,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:15:58,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:58,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-17 12:15:58,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379831447] [2020-07-17 12:15:58,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:15:58,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:58,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:15:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:15:58,901 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-07-17 12:15:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:58,975 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-17 12:15:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:15:58,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-17 12:15:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:58,976 INFO L225 Difference]: With dead ends: 39 [2020-07-17 12:15:58,977 INFO L226 Difference]: Without dead ends: 34 [2020-07-17 12:15:58,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:15:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-17 12:15:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-17 12:15:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 12:15:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-17 12:15:58,983 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-07-17 12:15:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:58,983 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-17 12:15:58,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:15:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-17 12:15:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:15:58,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:58,985 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:59,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:59,201 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 4 times [2020-07-17 12:15:59,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:59,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416192240] [2020-07-17 12:15:59,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:15:59,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416192240] [2020-07-17 12:15:59,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927142574] [2020-07-17 12:15:59,283 INFO L92 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 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 [2020-07-17 12:15:59,319 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:15:59,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:59,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-17 12:15:59,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:59,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:59,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2020-07-17 12:15:59,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054408871] [2020-07-17 12:15:59,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:15:59,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:59,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:15:59,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:15:59,347 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-07-17 12:15:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:59,405 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-17 12:15:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:15:59,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-17 12:15:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:59,406 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:15:59,406 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 12:15:59,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:15:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 12:15:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-17 12:15:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 12:15:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-17 12:15:59,412 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-07-17 12:15:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:59,413 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-17 12:15:59,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:15:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-17 12:15:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 12:15:59,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:59,414 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:59,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:59,626 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 5 times [2020-07-17 12:15:59,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:59,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232617307] [2020-07-17 12:15:59,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:59,664 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:15:59,664 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:15:59,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:15:59,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:15:59 BoogieIcfgContainer [2020-07-17 12:15:59,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:15:59,691 INFO L168 Benchmark]: Toolchain (without parser) took 3557.37 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 101.8 MB in the beginning and 133.7 MB in the end (delta: -32.0 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:59,692 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 12:15:59,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.21 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:59,693 INFO L168 Benchmark]: Boogie Preprocessor took 99.12 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 181.4 MB in the end (delta: -89.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:59,694 INFO L168 Benchmark]: RCFGBuilder took 235.66 ms. Allocated memory is still 201.3 MB. Free memory was 181.4 MB in the beginning and 169.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:59,695 INFO L168 Benchmark]: TraceAbstraction took 2993.23 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 169.0 MB in the beginning and 133.7 MB in the end (delta: 35.2 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:59,698 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 223.21 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.12 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 181.4 MB in the end (delta: -89.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 235.66 ms. Allocated memory is still 201.3 MB. Free memory was 181.4 MB in the beginning and 169.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2993.23 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 169.0 MB in the beginning and 133.7 MB in the end (delta: 35.2 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 69 SDslu, 216 SDs, 0 SdLazy, 156 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 343 NumberOfCodeBlocks, 342 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 12474 SizeOfPredicates, 5 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 176/380 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...