/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:02:55,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:02:55,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:02:55,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:02:55,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:02:55,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:02:55,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:02:55,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:02:55,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:02:55,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:02:55,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:02:55,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:02:55,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:02:55,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:02:55,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:02:55,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:02:55,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:02:55,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:02:55,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:02:55,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:02:55,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:02:55,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:02:55,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:02:55,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:02:55,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:02:55,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:02:55,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:02:55,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:02:55,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:02:55,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:02:55,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:02:55,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:02:55,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:02:55,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:02:55,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:02:55,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:02:55,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:02:55,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:02:55,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:02:55,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:02:55,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:02:55,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:02:55,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:02:55,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:02:55,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:02:55,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:02:55,818 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:02:55,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:02:55,819 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:02:55,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:02:55,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:02:55,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:02:55,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:02:55,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:02:55,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:02:55,820 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:02:55,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:02:55,821 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:02:55,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:02:55,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:02:55,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:02:55,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:02:55,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:02:55,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:02:55,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:02:55,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:02:55,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:02:55,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:02:55,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:02:55,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:02:55,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:02:55,826 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:02:56,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:02:56,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:02:56,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:02:56,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:02:56,180 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:02:56,180 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-12 16:02:56,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c831af17/cac68411cec14792ac2bddebd91c5101/FLAGa10a79921 [2020-10-12 16:02:56,728 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:02:56,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-12 16:02:56,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c831af17/cac68411cec14792ac2bddebd91c5101/FLAGa10a79921 [2020-10-12 16:02:57,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c831af17/cac68411cec14792ac2bddebd91c5101 [2020-10-12 16:02:57,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:02:57,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:02:57,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:02:57,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:02:57,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:02:57,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57, skipping insertion in model container [2020-10-12 16:02:57,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:02:57,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:02:57,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:02:57,298 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:02:57,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:02:57,336 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:02:57,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57 WrapperNode [2020-10-12 16:02:57,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:02:57,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:02:57,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:02:57,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:02:57,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... [2020-10-12 16:02:57,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:02:57,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:02:57,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:02:57,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:02:57,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 16:02:57,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:02:57,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:02:57,523 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:02:57,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:02:57,524 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:02:57,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:02:57,524 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:02:57,524 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:02:57,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:02:57,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:02:57,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 16:02:57,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 16:02:57,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 16:02:57,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 16:02:57,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:02:57,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:02:57,815 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:02:57,815 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:02:57,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:02:57 BoogieIcfgContainer [2020-10-12 16:02:57,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:02:57,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:02:57,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:02:57,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:02:57,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:02:57" (1/3) ... [2020-10-12 16:02:57,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b035d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:02:57, skipping insertion in model container [2020-10-12 16:02:57,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:57" (2/3) ... [2020-10-12 16:02:57,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b035d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:02:57, skipping insertion in model container [2020-10-12 16:02:57,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:02:57" (3/3) ... [2020-10-12 16:02:57,836 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2020-10-12 16:02:57,846 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:02:57,853 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:02:57,867 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:02:57,891 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:02:57,891 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:02:57,892 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:02:57,892 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:02:57,892 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:02:57,892 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:02:57,892 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:02:57,892 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:02:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-12 16:02:57,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:02:57,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:57,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:57,918 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:57,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1585717717, now seen corresponding path program 1 times [2020-10-12 16:02:57,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:57,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547874795] [2020-10-12 16:02:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:58,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:58,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:58,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:02:58,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:58,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-12 16:02:58,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:02:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:02:58,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:02:58,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 16:02:58,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:58,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:58,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:58,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:58,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 16:02:58,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:58,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:02:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:58,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547874795] [2020-10-12 16:02:58,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:02:58,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:02:58,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711038095] [2020-10-12 16:02:58,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:02:58,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:58,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:02:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:02:58,716 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-10-12 16:02:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:58,925 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-12 16:02:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:02:58,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-12 16:02:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:58,937 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:02:58,938 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:02:58,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:02:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:02:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-12 16:02:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:02:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-12 16:02:58,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-10-12 16:02:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:58,978 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-12 16:02:58,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:02:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-12 16:02:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:02:58,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:58,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:58,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:02:58,980 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1583870675, now seen corresponding path program 1 times [2020-10-12 16:02:58,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:58,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359344452] [2020-10-12 16:02:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:59,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:59,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:02:59,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:59,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-12 16:02:59,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:02:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:02:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:59,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:59,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:59,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:59,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:02:59,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:59,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:59,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:59,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:59,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359344452] [2020-10-12 16:02:59,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:02:59,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:02:59,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169908817] [2020-10-12 16:02:59,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:02:59,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:59,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:02:59,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:02:59,191 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-12 16:02:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:59,316 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-12 16:02:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:02:59,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-12 16:02:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:59,322 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:02:59,322 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:02:59,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:02:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:02:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-12 16:02:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:02:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-12 16:02:59,337 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-10-12 16:02:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:59,337 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-12 16:02:59,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:02:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-12 16:02:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:02:59,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:59,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:59,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:02:59,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1719027899, now seen corresponding path program 1 times [2020-10-12 16:02:59,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:59,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937113185] [2020-10-12 16:02:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:59,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:59,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:02:59,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:02:59,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-12 16:02:59,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:59,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:02:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:02:59,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:00,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:00,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:00,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:00,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:00,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:00,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:00,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:00,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937113185] [2020-10-12 16:03:00,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:00,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:03:00,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222474354] [2020-10-12 16:03:00,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:03:00,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:03:00,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:03:00,159 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 9 states. [2020-10-12 16:03:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:00,397 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-12 16:03:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:03:00,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-12 16:03:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:00,399 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:03:00,400 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:03:00,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:03:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:03:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2020-10-12 16:03:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:03:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-12 16:03:00,410 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 15 [2020-10-12 16:03:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:00,411 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-12 16:03:00,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:03:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-12 16:03:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:03:00,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:00,412 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:00,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:03:00,412 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1613934547, now seen corresponding path program 2 times [2020-10-12 16:03:00,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:00,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613158565] [2020-10-12 16:03:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:00,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:00,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:00,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:00,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:03:00,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:03:00,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-12 16:03:00,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:00,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:03:00,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:00,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:03:00,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:01,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:01,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:01,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:01,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613158565] [2020-10-12 16:03:01,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:01,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:03:01,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604180926] [2020-10-12 16:03:01,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:03:01,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:01,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:03:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:03:01,251 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-12 16:03:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:01,660 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-12 16:03:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:03:01,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-12 16:03:01,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:01,662 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:03:01,662 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:03:01,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:03:01,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:03:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2020-10-12 16:03:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:03:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 16:03:01,671 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2020-10-12 16:03:01,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:01,671 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 16:03:01,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:03:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 16:03:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:03:01,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:01,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:01,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:03:01,673 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:01,673 INFO L82 PathProgramCache]: Analyzing trace with hash -354707271, now seen corresponding path program 1 times [2020-10-12 16:03:01,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:01,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878750707] [2020-10-12 16:03:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:03:01,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 16:03:01,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:03:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:03:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:01,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:01,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 16:03:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:01,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:03:01,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 16:03:01,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:01,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:03:01,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878750707] [2020-10-12 16:03:01,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:01,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:03:01,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080689513] [2020-10-12 16:03:01,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:03:01,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:03:01,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:03:01,807 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-10-12 16:03:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:01,885 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-12 16:03:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:03:01,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-12 16:03:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:01,887 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:03:01,887 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:03:01,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:03:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:03:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-12 16:03:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:03:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 16:03:01,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-12 16:03:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:01,895 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 16:03:01,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:03:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 16:03:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:03:01,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:01,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:01,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:03:01,897 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1035044049, now seen corresponding path program 2 times [2020-10-12 16:03:01,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:01,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771709279] [2020-10-12 16:03:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:03:02,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:02,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-12 16:03:02,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:03:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:03:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:02,597 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-12 16:03:02,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:02,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:02,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:02,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:02,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 16:03:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:02,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:03:02,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:02,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:02,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:02,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771709279] [2020-10-12 16:03:02,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:02,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:03:02,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863461589] [2020-10-12 16:03:02,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:03:02,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:03:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:03:02,682 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-12 16:03:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:02,979 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-12 16:03:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:03:02,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-12 16:03:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:02,980 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:03:02,980 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:03:02,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:03:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:03:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2020-10-12 16:03:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:03:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 16:03:02,991 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2020-10-12 16:03:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:02,991 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 16:03:02,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:03:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 16:03:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:03:02,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:02,993 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:02,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:03:02,994 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1167662009, now seen corresponding path program 3 times [2020-10-12 16:03:02,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:02,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108324168] [2020-10-12 16:03:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:03,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:03,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:03:03,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:03,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 717 [2020-10-12 16:03:03,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:03,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:03:03,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:03,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:03:03,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:03,986 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-12 16:03:04,206 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2020-10-12 16:03:04,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:04,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:04,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:04,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:04,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:04,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:04,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:04,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 16:03:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:04,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:04,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:04,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:04,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:03:04,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:04,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:04,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:04,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108324168] [2020-10-12 16:03:04,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:04,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:03:04,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520684245] [2020-10-12 16:03:04,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:03:04,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:03:04,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:03:04,277 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-10-12 16:03:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:04,922 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-12 16:03:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:03:04,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 16:03:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:04,924 INFO L225 Difference]: With dead ends: 73 [2020-10-12 16:03:04,924 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 16:03:04,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:03:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 16:03:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2020-10-12 16:03:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:03:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-12 16:03:04,945 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-10-12 16:03:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:04,945 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-12 16:03:04,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:03:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-12 16:03:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:03:04,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:04,947 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:04,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:03:04,947 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash 983851473, now seen corresponding path program 4 times [2020-10-12 16:03:04,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:04,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375763909] [2020-10-12 16:03:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:03:05,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:05,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-12 16:03:05,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:03:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:03:05,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:05,913 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-12 16:03:06,158 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-12 16:03:06,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:06,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:06,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:06,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:06,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:06,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:06,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:06,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:06,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 16:03:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:06,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:06,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:06,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:06,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:03:06,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:06,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:06,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:06,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:06,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:06,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375763909] [2020-10-12 16:03:06,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:06,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:03:06,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809353670] [2020-10-12 16:03:06,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:03:06,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:03:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:03:06,239 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 11 states. [2020-10-12 16:03:06,510 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-12 16:03:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:06,952 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-12 16:03:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:03:06,953 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-12 16:03:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:06,954 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:03:06,954 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:03:06,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:03:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:03:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2020-10-12 16:03:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:03:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-12 16:03:06,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-10-12 16:03:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:06,966 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-12 16:03:06,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:03:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-12 16:03:06,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:03:06,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:06,967 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:06,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:03:06,968 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:06,968 INFO L82 PathProgramCache]: Analyzing trace with hash -419307847, now seen corresponding path program 5 times [2020-10-12 16:03:06,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:06,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152580163] [2020-10-12 16:03:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:06,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:07,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:07,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:07,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:03:07,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:07,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-12 16:03:07,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:07,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:03:07,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:07,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:03:07,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:08,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:08,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:08,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:08,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:08,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:08,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:08,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:08,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:08,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:03:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:08,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:08,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:08,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:08,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 16:03:08,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:08,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152580163] [2020-10-12 16:03:08,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:08,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:03:08,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727070723] [2020-10-12 16:03:08,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:03:08,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:08,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:03:08,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:03:08,485 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2020-10-12 16:03:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:11,358 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-12 16:03:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:03:11,359 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 16:03:11,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:11,360 INFO L225 Difference]: With dead ends: 74 [2020-10-12 16:03:11,360 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:03:11,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:03:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:03:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2020-10-12 16:03:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:03:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-12 16:03:11,371 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 28 [2020-10-12 16:03:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:11,372 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-12 16:03:11,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:03:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-12 16:03:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:03:11,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:11,373 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:11,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:03:11,374 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -967573807, now seen corresponding path program 6 times [2020-10-12 16:03:11,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:11,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738888525] [2020-10-12 16:03:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:11,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:11,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:12,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:12,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:03:12,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:12,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-12 16:03:12,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:03:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:03:12,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:12,614 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-12 16:03:13,224 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 33 [2020-10-12 16:03:13,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:13,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:13,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:13,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:13,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:13,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:13,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:13,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:13,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:13,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:13,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 16:03:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:13,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:13,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:13,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:13,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:13,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:03:13,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:13,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:13,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:13,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:13,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:13,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738888525] [2020-10-12 16:03:13,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:13,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:03:13,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127234759] [2020-10-12 16:03:13,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:03:13,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:03:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:03:13,445 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 13 states. [2020-10-12 16:03:13,793 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 26 [2020-10-12 16:03:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:14,785 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-12 16:03:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:03:14,786 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 16:03:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:14,788 INFO L225 Difference]: With dead ends: 82 [2020-10-12 16:03:14,788 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:03:14,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:03:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:03:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2020-10-12 16:03:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:03:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-12 16:03:14,800 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2020-10-12 16:03:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:14,800 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-12 16:03:14,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:03:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-12 16:03:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:03:14,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:14,802 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:14,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:03:14,802 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -783949383, now seen corresponding path program 7 times [2020-10-12 16:03:14,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:14,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598779182] [2020-10-12 16:03:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:14,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:14,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:15,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:15,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:03:15,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:15,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-12 16:03:15,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:03:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:03:15,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:16,141 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-12 16:03:16,744 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-12 16:03:16,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:16,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:16,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:16,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:16,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:16,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:16,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:16,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:16,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:16,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:16,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:16,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 16:03:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:16,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:16,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:16,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:16,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:16,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:03:16,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:16,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:16,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:16,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:16,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:16,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598779182] [2020-10-12 16:03:16,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:16,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:03:16,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132430036] [2020-10-12 16:03:16,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:03:16,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:03:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:03:16,858 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 14 states. [2020-10-12 16:03:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:20,094 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-10-12 16:03:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:03:20,095 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-12 16:03:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:20,096 INFO L225 Difference]: With dead ends: 70 [2020-10-12 16:03:20,096 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:03:20,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:03:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:03:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-12 16:03:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:03:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-12 16:03:20,119 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 30 [2020-10-12 16:03:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:20,119 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-12 16:03:20,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:03:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-12 16:03:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:03:20,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:20,124 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:20,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:03:20,124 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 613440465, now seen corresponding path program 8 times [2020-10-12 16:03:20,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:20,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735104783] [2020-10-12 16:03:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:20,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:20,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:21,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:21,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:03:21,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:21,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-12 16:03:21,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:03:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:03:21,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:21,920 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 28 [2020-10-12 16:03:22,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:22,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:22,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:22,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:22,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:22,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:22,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:22,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 16:03:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:22,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:22,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:22,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:03:22,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:22,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:22,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:22,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:22,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:03:22,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735104783] [2020-10-12 16:03:22,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:22,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:03:22,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405759432] [2020-10-12 16:03:22,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:03:22,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:03:22,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:03:22,057 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 15 states. [2020-10-12 16:03:22,706 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-12 16:03:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:23,161 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-10-12 16:03:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:03:23,162 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 16:03:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:23,163 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:03:23,164 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:03:23,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:03:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:03:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2020-10-12 16:03:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:03:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-12 16:03:23,186 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2020-10-12 16:03:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:23,186 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-12 16:03:23,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:03:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-12 16:03:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:03:23,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:23,188 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:23,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:03:23,188 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1054607675, now seen corresponding path program 9 times [2020-10-12 16:03:23,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:23,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876325316] [2020-10-12 16:03:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:23,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:23,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:23,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:23,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:03:23,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:23,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-12 16:03:23,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:03:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:03:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1