/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:42:13,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:42:13,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:42:13,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:42:13,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:42:13,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:42:13,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:42:13,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:42:13,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:42:13,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:42:13,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:42:13,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:42:13,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:42:13,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:42:13,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:42:13,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:42:13,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:42:13,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:42:13,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:42:13,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:42:13,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:42:13,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:42:13,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:42:13,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:42:13,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:42:13,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:42:13,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:42:13,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:42:13,770 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 [2020-07-20 22:42:13,787 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:42:13,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:42:13,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:42:13,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:42:13,789 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:42:13,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:42:13,790 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:42:13,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:42:13,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:42:13,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:42:13,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:42:13,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:42:13,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:42:13,791 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:42:13,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:42:13,792 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:42:13,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:42:13,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:42:13,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:42:13,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:42:13,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:42:13,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:42:13,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:42:13,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:42:13,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:42:13,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:42:13,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:13,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:42:13,795 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:42:13,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:42:14,152 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:42:14,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:42:14,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:42:14,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:42:14,173 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:42:14,174 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-20 22:42:14,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fee1c59b/8d1838ca54c24f07bc981f3bdefe291b/FLAG05951701e [2020-07-20 22:42:14,837 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:42:14,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-20 22:42:14,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fee1c59b/8d1838ca54c24f07bc981f3bdefe291b/FLAG05951701e [2020-07-20 22:42:15,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fee1c59b/8d1838ca54c24f07bc981f3bdefe291b [2020-07-20 22:42:15,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:42:15,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:42:15,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:42:15,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:42:15,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:42:15,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71820c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15, skipping insertion in model container [2020-07-20 22:42:15,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:42:15,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:42:15,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:42:15,573 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:42:15,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:42:15,672 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:42:15,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15 WrapperNode [2020-07-20 22:42:15,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:42:15,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:42:15,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:42:15,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:42:15,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (1/1) ... [2020-07-20 22:42:15,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:42:15,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:42:15,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:42:15,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:42:15,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (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 [2020-07-20 22:42:15,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:42:15,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:42:15,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:42:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:42:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 22:42:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 22:42:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:42:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:42:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:42:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:42:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 22:42:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 22:42:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:42:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:42:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:42:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 22:42:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:42:18,684 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:42:18,685 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 22:42:18,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:42:18 BoogieIcfgContainer [2020-07-20 22:42:18,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:42:18,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:42:18,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:42:18,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:42:18,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:42:15" (1/3) ... [2020-07-20 22:42:18,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4d62d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:42:18, skipping insertion in model container [2020-07-20 22:42:18,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:15" (2/3) ... [2020-07-20 22:42:18,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4d62d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:42:18, skipping insertion in model container [2020-07-20 22:42:18,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:42:18" (3/3) ... [2020-07-20 22:42:18,699 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-07-20 22:42:18,711 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:42:18,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:42:18,737 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:42:18,764 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:42:18,765 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:42:18,765 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:42:18,765 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:42:18,766 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:42:18,766 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:42:18,766 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:42:18,766 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:42:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 22:42:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 22:42:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:18,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:18,796 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:18,803 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2020-07-20 22:42:18,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:18,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028355652] [2020-07-20 22:42:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:21,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:42:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:42:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:42:21,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:42:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:21,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:42:21,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028355652] [2020-07-20 22:42:21,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:42:21,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:42:21,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764505422] [2020-07-20 22:42:21,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:42:21,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:42:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:42:21,422 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-20 22:42:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:42:21,495 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-07-20 22:42:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:42:21,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-20 22:42:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:42:21,509 INFO L225 Difference]: With dead ends: 46 [2020-07-20 22:42:21,509 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 22:42:21,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:42:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 22:42:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-07-20 22:42:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 22:42:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 22:42:21,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 22:42:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:42:21,556 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 22:42:21,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:42:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 22:42:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 22:42:21,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:21,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:21,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:21,759 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2020-07-20 22:42:21,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:21,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006814615] [2020-07-20 22:42:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:24,162 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:42:24,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:42:24,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:42:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:42:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:24,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:42:24,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006814615] [2020-07-20 22:42:24,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:42:24,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:42:24,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834737185] [2020-07-20 22:42:24,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:42:24,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:24,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:42:24,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:42:24,214 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-07-20 22:42:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:42:24,265 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-07-20 22:42:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:42:24,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-20 22:42:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:42:24,268 INFO L225 Difference]: With dead ends: 28 [2020-07-20 22:42:24,268 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 22:42:24,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:42:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 22:42:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-07-20 22:42:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 22:42:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-20 22:42:24,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-07-20 22:42:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:42:24,288 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-20 22:42:24,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:42:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-20 22:42:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 22:42:24,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:24,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:24,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:24,494 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2020-07-20 22:42:24,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:24,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545690285] [2020-07-20 22:42:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:38,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:42:38,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:42:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:42:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:42:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:38,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:42:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:38,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545690285] [2020-07-20 22:42:38,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:42:38,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 22:42:38,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019579597] [2020-07-20 22:42:38,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:42:38,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:38,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:42:38,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:42:38,585 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-07-20 22:42:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:42:42,956 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-07-20 22:42:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:42:42,957 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-20 22:42:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:42:42,958 INFO L225 Difference]: With dead ends: 53 [2020-07-20 22:42:42,958 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 22:42:42,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:42:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 22:42:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-07-20 22:42:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 22:42:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-07-20 22:42:42,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2020-07-20 22:42:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:42:42,969 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-07-20 22:42:42,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:42:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-07-20 22:42:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 22:42:42,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:42,971 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:43,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:43,176 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash 599808768, now seen corresponding path program 2 times [2020-07-20 22:42:43,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:43,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363871704] [2020-07-20 22:42:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:43:06,249 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:43:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:43:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:43:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:43:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:43:06,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:43:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 36 refuted. 12 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:43:12,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363871704] [2020-07-20 22:43:12,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:43:12,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 22:43:12,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417074998] [2020-07-20 22:43:12,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 22:43:12,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:43:12,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 22:43:12,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=128, Unknown=3, NotChecked=0, Total=182 [2020-07-20 22:43:12,902 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-07-20 22:43:17,443 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-20 22:43:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:43:18,075 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-07-20 22:43:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:43:18,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-07-20 22:43:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:43:18,077 INFO L225 Difference]: With dead ends: 89 [2020-07-20 22:43:18,078 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 22:43:18,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=192, Invalid=455, Unknown=3, NotChecked=0, Total=650 [2020-07-20 22:43:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 22:43:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-07-20 22:43:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 22:43:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-07-20 22:43:18,098 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 37 [2020-07-20 22:43:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:43:18,100 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-07-20 22:43:18,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 22:43:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-07-20 22:43:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 22:43:18,103 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:43:18,103 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:43:18,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:43:18,320 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:43:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:43:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 740837808, now seen corresponding path program 3 times [2020-07-20 22:43:18,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:43:18,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983378701] [2020-07-20 22:43:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:44:37,920 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:44:37,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:44:42,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 22:44:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:44:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:44:42,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:44:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 287 refuted. 13 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:44:55,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983378701] [2020-07-20 22:44:55,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:44:55,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 22:44:55,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624908097] [2020-07-20 22:44:55,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 22:44:55,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:44:55,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 22:44:55,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=473, Unknown=6, NotChecked=0, Total=650 [2020-07-20 22:44:55,245 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2020-07-20 22:45:16,495 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-20 22:45:17,348 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-20 22:45:17,892 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-20 22:45:20,531 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 22:45:23,451 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 22:45:31,825 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 22:45:36,642 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-07-20 22:45:45,158 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-07-20 22:45:52,078 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-07-20 22:45:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:45:58,573 INFO L93 Difference]: Finished difference Result 161 states and 175 transitions. [2020-07-20 22:45:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 22:45:58,575 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-07-20 22:45:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:45:58,578 INFO L225 Difference]: With dead ends: 161 [2020-07-20 22:45:58,579 INFO L226 Difference]: Without dead ends: 151 [2020-07-20 22:45:58,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=666, Invalid=1773, Unknown=11, NotChecked=0, Total=2450 [2020-07-20 22:45:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-20 22:45:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2020-07-20 22:45:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 22:45:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-07-20 22:45:58,600 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 73 [2020-07-20 22:45:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:45:58,601 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-07-20 22:45:58,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 22:45:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-07-20 22:45:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-20 22:45:58,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:45:58,607 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:45:58,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:45:58,821 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:45:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:45:58,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1184145648, now seen corresponding path program 4 times [2020-07-20 22:45:58,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:45:58,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556530001] [2020-07-20 22:45:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:50:27,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:50:27,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:50:40,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 22:50:40,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:50:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 44 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:50:40,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:51:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 44 proven. 1415 refuted. 37 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:51:03,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556530001] [2020-07-20 22:51:03,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:51:03,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 22:51:03,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792050377] [2020-07-20 22:51:03,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 22:51:03,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:51:03,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 22:51:03,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1819, Unknown=10, NotChecked=0, Total=2450 [2020-07-20 22:51:03,064 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 50 states. [2020-07-20 22:51:36,767 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 14 [2020-07-20 22:51:40,898 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 15 [2020-07-20 22:51:46,724 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 95 DAG size of output: 15 [2020-07-20 22:51:55,228 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-20 22:52:02,148 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2020-07-20 22:52:14,069 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-07-20 22:52:21,575 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-20 22:52:28,164 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-07-20 22:52:39,937 WARN L193 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 65 DAG size of output: 15 [2020-07-20 22:52:49,226 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-20 22:52:53,719 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-20 22:53:05,823 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 22:53:19,276 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 22:53:23,393 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 22:53:42,763 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-07-20 22:54:08,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:54:08,919 INFO L93 Difference]: Finished difference Result 281 states and 303 transitions. [2020-07-20 22:54:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-20 22:54:08,919 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2020-07-20 22:54:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:54:08,923 INFO L225 Difference]: With dead ends: 281 [2020-07-20 22:54:08,923 INFO L226 Difference]: Without dead ends: 271 [2020-07-20 22:54:08,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 171.2s TimeCoverageRelationStatistics Valid=2176, Invalid=6542, Unknown=24, NotChecked=0, Total=8742 [2020-07-20 22:54:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-20 22:54:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2020-07-20 22:54:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-07-20 22:54:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2020-07-20 22:54:08,955 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 145 [2020-07-20 22:54:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:54:08,956 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2020-07-20 22:54:08,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 22:54:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2020-07-20 22:54:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-20 22:54:08,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:54:08,968 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:54:09,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:54:09,183 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:54:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:54:09,184 INFO L82 PathProgramCache]: Analyzing trace with hash 713884336, now seen corresponding path program 5 times [2020-07-20 22:54:09,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:54:09,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460072783] [2020-07-20 22:54:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in