/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:52:52,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:52:52,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:52:52,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:52:52,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:52:52,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:52:52,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:52:52,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:52:52,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:52:52,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:52:52,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:52:52,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:52:52,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:52:52,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:52:52,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:52:52,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:52:52,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:52:52,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:52:52,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:52:52,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:52:52,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:52:52,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:52:52,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:52:52,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:52:52,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:52:52,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:52:52,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:52:52,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:52:52,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:52:52,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:52:52,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:52:52,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:52:52,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:52:52,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:52:52,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:52:52,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:52:52,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:52:52,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:52:52,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:52:52,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:52:52,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:52:52,805 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 [2020-10-28 14:52:52,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:52:52,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:52:52,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:52:52,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:52:52,863 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:52:52,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:52:52,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:52:52,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:52:52,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:52:52,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:52:52,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:52:52,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:52:52,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:52:52,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:52:52,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:52:52,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:52:52,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:52:52,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:52:52,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:52:52,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:52:52,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:52:52,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:52:52,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:52:52,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:52:52,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:52:52,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:52:52,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:52:52,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:52:52,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:52:52,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:52:53,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:52:53,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:52:53,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:52:53,297 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:52:53,298 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:52:53,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2020-10-28 14:52:53,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5073a25b7/a60d467256a849849761b8667b0f4496/FLAGa685bc862 [2020-10-28 14:52:54,142 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:52:54,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_14-1.c [2020-10-28 14:52:54,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5073a25b7/a60d467256a849849761b8667b0f4496/FLAGa685bc862 [2020-10-28 14:52:54,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5073a25b7/a60d467256a849849761b8667b0f4496 [2020-10-28 14:52:54,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:52:54,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:52:54,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:52:54,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:52:54,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:52:54,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c7375e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54, skipping insertion in model container [2020-10-28 14:52:54,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:52:54,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:52:54,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:52:54,787 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:52:54,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:52:54,846 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:52:54,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54 WrapperNode [2020-10-28 14:52:54,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:52:54,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:52:54,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:52:54,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:52:54,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (1/1) ... [2020-10-28 14:52:54,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:52:54,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:52:54,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:52:54,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:52:54,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (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 [2020-10-28 14:52:55,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:52:55,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:52:55,011 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:52:55,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:52:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:52:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:52:55,013 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:52:55,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:52:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:52:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:52:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:52:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:52:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:52:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:52:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:52:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:52:55,708 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:52:55,708 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:52:55,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:52:55 BoogieIcfgContainer [2020-10-28 14:52:55,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:52:55,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:52:55,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:52:55,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:52:55,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:52:54" (1/3) ... [2020-10-28 14:52:55,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3143b92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:52:55, skipping insertion in model container [2020-10-28 14:52:55,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:52:54" (2/3) ... [2020-10-28 14:52:55,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3143b92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:52:55, skipping insertion in model container [2020-10-28 14:52:55,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:52:55" (3/3) ... [2020-10-28 14:52:55,723 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2020-10-28 14:52:55,736 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:52:55,743 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:52:55,759 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:52:55,802 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:52:55,803 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:52:55,803 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:52:55,803 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:52:55,803 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:52:55,803 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:52:55,803 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:52:55,804 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:52:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-10-28 14:52:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:52:55,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:55,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:55,840 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash 171270273, now seen corresponding path program 1 times [2020-10-28 14:52:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:55,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976520593] [2020-10-28 14:52:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:56,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:56,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:52:56,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:56,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-28 14:52:56,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:56,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:56,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:52:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:52:56,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:52:56,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:56,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:56,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:56,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:56,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:52:56,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:56,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:56,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:56,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976520593] [2020-10-28 14:52:56,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:56,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:56,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892113320] [2020-10-28 14:52:56,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:56,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:56,655 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-10-28 14:52:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:56,993 INFO L93 Difference]: Finished difference Result 116 states and 205 transitions. [2020-10-28 14:52:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:56,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 14:52:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:57,008 INFO L225 Difference]: With dead ends: 116 [2020-10-28 14:52:57,008 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 14:52:57,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 14:52:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-10-28 14:52:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:52:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 123 transitions. [2020-10-28 14:52:57,066 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 123 transitions. Word has length 26 [2020-10-28 14:52:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:57,067 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 123 transitions. [2020-10-28 14:52:57,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 123 transitions. [2020-10-28 14:52:57,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:52:57,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:57,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:57,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:52:57,069 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:57,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1822874433, now seen corresponding path program 1 times [2020-10-28 14:52:57,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:57,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702705262] [2020-10-28 14:52:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:57,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:57,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:52:57,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:57,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-28 14:52:57,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:57,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:57,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:52:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:57,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:57,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:57,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:57,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:57,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:52:57,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:57,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:57,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:57,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702705262] [2020-10-28 14:52:57,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:57,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:57,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755512295] [2020-10-28 14:52:57,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:57,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:57,324 INFO L87 Difference]: Start difference. First operand 68 states and 123 transitions. Second operand 4 states. [2020-10-28 14:52:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:57,608 INFO L93 Difference]: Finished difference Result 159 states and 295 transitions. [2020-10-28 14:52:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:57,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 14:52:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:57,613 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:52:57,613 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 14:52:57,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 14:52:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-28 14:52:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 14:52:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 175 transitions. [2020-10-28 14:52:57,640 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 175 transitions. Word has length 26 [2020-10-28 14:52:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:57,641 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 175 transitions. [2020-10-28 14:52:57,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 175 transitions. [2020-10-28 14:52:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:52:57,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:57,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:57,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:52:57,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1020979385, now seen corresponding path program 1 times [2020-10-28 14:52:57,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:57,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206462423] [2020-10-28 14:52:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:57,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:52:57,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:57,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-28 14:52:57,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:57,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:52:57,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:57,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:52:57,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:57,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:57,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:57,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:57,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:52:57,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:57,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206462423] [2020-10-28 14:52:57,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:57,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432279404] [2020-10-28 14:52:57,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:57,928 INFO L87 Difference]: Start difference. First operand 96 states and 175 transitions. Second operand 4 states. [2020-10-28 14:52:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:58,180 INFO L93 Difference]: Finished difference Result 272 states and 508 transitions. [2020-10-28 14:52:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:58,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:52:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:58,185 INFO L225 Difference]: With dead ends: 272 [2020-10-28 14:52:58,185 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 14:52:58,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 14:52:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-28 14:52:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 14:52:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 334 transitions. [2020-10-28 14:52:58,207 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 334 transitions. Word has length 27 [2020-10-28 14:52:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:58,207 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 334 transitions. [2020-10-28 14:52:58,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 334 transitions. [2020-10-28 14:52:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:52:58,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:58,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:58,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:52:58,209 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1279843205, now seen corresponding path program 1 times [2020-10-28 14:52:58,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:58,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369547525] [2020-10-28 14:52:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:58,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:58,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:58,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:58,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:52:58,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:58,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-28 14:52:58,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:58,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:58,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:58,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:52:58,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:52:58,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:58,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:58,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:58,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:58,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:58,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:58,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:52:58,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:58,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:58,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:58,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:58,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:58,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:52:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:58,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369547525] [2020-10-28 14:52:58,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:58,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:58,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062170639] [2020-10-28 14:52:58,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:58,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:58,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:58,528 INFO L87 Difference]: Start difference. First operand 181 states and 334 transitions. Second operand 4 states. [2020-10-28 14:52:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:58,806 INFO L93 Difference]: Finished difference Result 237 states and 437 transitions. [2020-10-28 14:52:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:58,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:52:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:58,809 INFO L225 Difference]: With dead ends: 237 [2020-10-28 14:52:58,809 INFO L226 Difference]: Without dead ends: 234 [2020-10-28 14:52:58,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-28 14:52:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2020-10-28 14:52:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 14:52:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 332 transitions. [2020-10-28 14:52:58,825 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 332 transitions. Word has length 27 [2020-10-28 14:52:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:58,826 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 332 transitions. [2020-10-28 14:52:58,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 332 transitions. [2020-10-28 14:52:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:52:58,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:58,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:58,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:52:58,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1592168652, now seen corresponding path program 1 times [2020-10-28 14:52:58,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:58,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909394510] [2020-10-28 14:52:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:58,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:58,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:59,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:52:59,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:59,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-28 14:52:59,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:59,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:52:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:52:59,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:52:59,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:59,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:59,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:59,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:59,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:52:59,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:59,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:59,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909394510] [2020-10-28 14:52:59,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:59,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:59,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993906480] [2020-10-28 14:52:59,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:59,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:59,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:59,064 INFO L87 Difference]: Start difference. First operand 181 states and 332 transitions. Second operand 4 states. [2020-10-28 14:52:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:59,307 INFO L93 Difference]: Finished difference Result 345 states and 639 transitions. [2020-10-28 14:52:59,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:59,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 14:52:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:59,310 INFO L225 Difference]: With dead ends: 345 [2020-10-28 14:52:59,310 INFO L226 Difference]: Without dead ends: 342 [2020-10-28 14:52:59,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-28 14:52:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 245. [2020-10-28 14:52:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-28 14:52:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 448 transitions. [2020-10-28 14:52:59,329 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 448 transitions. Word has length 28 [2020-10-28 14:52:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:59,329 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 448 transitions. [2020-10-28 14:52:59,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 448 transitions. [2020-10-28 14:52:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:52:59,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:59,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:59,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:52:59,332 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash -401976054, now seen corresponding path program 1 times [2020-10-28 14:52:59,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:59,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842908387] [2020-10-28 14:52:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:59,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:52:59,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:52:59,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 14:52:59,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:59,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:59,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:52:59,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:52:59,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:52:59,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:52:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:52:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:59,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:52:59,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:52:59,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:52:59,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:52:59,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:52:59,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:52:59,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:52:59,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:52:59,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:52:59,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:52:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:52:59,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842908387] [2020-10-28 14:52:59,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:52:59,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:52:59,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324940984] [2020-10-28 14:52:59,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:52:59,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:52:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:52:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:52:59,629 INFO L87 Difference]: Start difference. First operand 245 states and 448 transitions. Second operand 4 states. [2020-10-28 14:52:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:52:59,926 INFO L93 Difference]: Finished difference Result 589 states and 1087 transitions. [2020-10-28 14:52:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:52:59,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 14:52:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:52:59,931 INFO L225 Difference]: With dead ends: 589 [2020-10-28 14:52:59,931 INFO L226 Difference]: Without dead ends: 350 [2020-10-28 14:52:59,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:52:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-28 14:52:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2020-10-28 14:52:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-28 14:52:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 636 transitions. [2020-10-28 14:52:59,956 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 636 transitions. Word has length 28 [2020-10-28 14:52:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:52:59,956 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 636 transitions. [2020-10-28 14:52:59,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:52:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 636 transitions. [2020-10-28 14:52:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:52:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:52:59,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:52:59,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:52:59,959 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:52:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:52:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2119177316, now seen corresponding path program 1 times [2020-10-28 14:52:59,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:52:59,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21153214] [2020-10-28 14:52:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:52:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:52:59,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:52:59,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:00,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:53:00,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-28 14:53:00,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:00,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:00,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:00,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:00,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:00,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:00,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:00,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:00,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21153214] [2020-10-28 14:53:00,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:00,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:00,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872188027] [2020-10-28 14:53:00,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:00,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:00,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:00,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:00,282 INFO L87 Difference]: Start difference. First operand 349 states and 636 transitions. Second operand 4 states. [2020-10-28 14:53:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:00,535 INFO L93 Difference]: Finished difference Result 661 states and 1215 transitions. [2020-10-28 14:53:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:00,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:53:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:00,543 INFO L225 Difference]: With dead ends: 661 [2020-10-28 14:53:00,543 INFO L226 Difference]: Without dead ends: 658 [2020-10-28 14:53:00,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-28 14:53:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 481. [2020-10-28 14:53:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-28 14:53:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 868 transitions. [2020-10-28 14:53:00,590 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 868 transitions. Word has length 29 [2020-10-28 14:53:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:00,591 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 868 transitions. [2020-10-28 14:53:00,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 868 transitions. [2020-10-28 14:53:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:53:00,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:00,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:00,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:53:00,601 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:00,602 INFO L82 PathProgramCache]: Analyzing trace with hash 125032610, now seen corresponding path program 1 times [2020-10-28 14:53:00,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:00,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886806371] [2020-10-28 14:53:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:00,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:53:00,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:00,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 14:53:00,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:00,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:00,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:00,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:00,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:00,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:00,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:00,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:00,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:00,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:00,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:00,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:00,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:00,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:00,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:00,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886806371] [2020-10-28 14:53:00,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:00,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:00,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450833856] [2020-10-28 14:53:00,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:00,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:00,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:00,960 INFO L87 Difference]: Start difference. First operand 481 states and 868 transitions. Second operand 4 states. [2020-10-28 14:53:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:01,218 INFO L93 Difference]: Finished difference Result 1157 states and 2103 transitions. [2020-10-28 14:53:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:01,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:53:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:01,226 INFO L225 Difference]: With dead ends: 1157 [2020-10-28 14:53:01,226 INFO L226 Difference]: Without dead ends: 682 [2020-10-28 14:53:01,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-10-28 14:53:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 681. [2020-10-28 14:53:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-10-28 14:53:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1224 transitions. [2020-10-28 14:53:01,261 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1224 transitions. Word has length 29 [2020-10-28 14:53:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:01,261 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 1224 transitions. [2020-10-28 14:53:01,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1224 transitions. [2020-10-28 14:53:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:53:01,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:01,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:01,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:53:01,263 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1276587287, now seen corresponding path program 1 times [2020-10-28 14:53:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:01,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35101514] [2020-10-28 14:53:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:01,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:01,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:01,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:01,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:01,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:01,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-28 14:53:01,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:01,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:01,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:01,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:01,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:01,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:01,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:01,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:01,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:01,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:01,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:01,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:01,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:01,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:01,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35101514] [2020-10-28 14:53:01,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:01,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782964219] [2020-10-28 14:53:01,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:01,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:01,780 INFO L87 Difference]: Start difference. First operand 681 states and 1224 transitions. Second operand 4 states. [2020-10-28 14:53:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:02,021 INFO L93 Difference]: Finished difference Result 1277 states and 2315 transitions. [2020-10-28 14:53:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:02,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:53:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:02,029 INFO L225 Difference]: With dead ends: 1277 [2020-10-28 14:53:02,030 INFO L226 Difference]: Without dead ends: 1274 [2020-10-28 14:53:02,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2020-10-28 14:53:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 953. [2020-10-28 14:53:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-10-28 14:53:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1688 transitions. [2020-10-28 14:53:02,070 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1688 transitions. Word has length 30 [2020-10-28 14:53:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:02,070 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1688 transitions. [2020-10-28 14:53:02,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1688 transitions. [2020-10-28 14:53:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:53:02,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:02,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:02,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:53:02,074 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -717557419, now seen corresponding path program 1 times [2020-10-28 14:53:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:02,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139615414] [2020-10-28 14:53:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:02,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:02,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:02,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:02,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-28 14:53:02,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:02,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:02,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:02,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:02,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:02,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:02,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:02,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:02,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:02,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:02,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:02,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:02,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:02,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:02,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:02,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:02,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:02,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139615414] [2020-10-28 14:53:02,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:02,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:02,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379066824] [2020-10-28 14:53:02,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:02,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:02,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:02,539 INFO L87 Difference]: Start difference. First operand 953 states and 1688 transitions. Second operand 4 states. [2020-10-28 14:53:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:02,751 INFO L93 Difference]: Finished difference Result 1424 states and 2515 transitions. [2020-10-28 14:53:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:02,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:53:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:02,756 INFO L225 Difference]: With dead ends: 1424 [2020-10-28 14:53:02,757 INFO L226 Difference]: Without dead ends: 957 [2020-10-28 14:53:02,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-10-28 14:53:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 956. [2020-10-28 14:53:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-10-28 14:53:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1668 transitions. [2020-10-28 14:53:02,803 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1668 transitions. Word has length 30 [2020-10-28 14:53:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:02,804 INFO L481 AbstractCegarLoop]: Abstraction has 956 states and 1668 transitions. [2020-10-28 14:53:02,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1668 transitions. [2020-10-28 14:53:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:53:02,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:02,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:02,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:53:02,806 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -498702701, now seen corresponding path program 1 times [2020-10-28 14:53:02,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:02,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671527191] [2020-10-28 14:53:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:02,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:02,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:02,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:02,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-28 14:53:02,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:02,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:02,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:03,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:03,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:03,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:03,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:03,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:03,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:03,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:03,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:03,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:03,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:03,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:03,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:53:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:03,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671527191] [2020-10-28 14:53:03,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:03,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:03,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689138110] [2020-10-28 14:53:03,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:03,048 INFO L87 Difference]: Start difference. First operand 956 states and 1668 transitions. Second operand 4 states. [2020-10-28 14:53:03,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:03,338 INFO L93 Difference]: Finished difference Result 2288 states and 4023 transitions. [2020-10-28 14:53:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:03,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:53:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:03,349 INFO L225 Difference]: With dead ends: 2288 [2020-10-28 14:53:03,349 INFO L226 Difference]: Without dead ends: 1341 [2020-10-28 14:53:03,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-10-28 14:53:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1340. [2020-10-28 14:53:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2020-10-28 14:53:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2332 transitions. [2020-10-28 14:53:03,409 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2332 transitions. Word has length 30 [2020-10-28 14:53:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:03,410 INFO L481 AbstractCegarLoop]: Abstraction has 1340 states and 2332 transitions. [2020-10-28 14:53:03,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2332 transitions. [2020-10-28 14:53:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:53:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:03,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:03,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:53:03,413 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -879327599, now seen corresponding path program 1 times [2020-10-28 14:53:03,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:03,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479451613] [2020-10-28 14:53:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:03,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:03,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:03,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:03,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:03,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:03,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:53:03,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:03,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-28 14:53:03,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:03,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:03,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:03,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:03,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:03,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:03,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:03,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:53:03,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:03,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:03,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:03,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:03,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:03,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479451613] [2020-10-28 14:53:03,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:03,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:03,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405825246] [2020-10-28 14:53:03,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:03,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:03,833 INFO L87 Difference]: Start difference. First operand 1340 states and 2332 transitions. Second operand 4 states. [2020-10-28 14:53:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:04,082 INFO L93 Difference]: Finished difference Result 2480 states and 4367 transitions. [2020-10-28 14:53:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:04,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 14:53:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:04,095 INFO L225 Difference]: With dead ends: 2480 [2020-10-28 14:53:04,096 INFO L226 Difference]: Without dead ends: 2477 [2020-10-28 14:53:04,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2020-10-28 14:53:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1900. [2020-10-28 14:53:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1900 states. [2020-10-28 14:53:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 3244 transitions. [2020-10-28 14:53:04,190 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 3244 transitions. Word has length 31 [2020-10-28 14:53:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:04,191 INFO L481 AbstractCegarLoop]: Abstraction has 1900 states and 3244 transitions. [2020-10-28 14:53:04,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 3244 transitions. [2020-10-28 14:53:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:53:04,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:04,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:04,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:53:04,196 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1421494991, now seen corresponding path program 1 times [2020-10-28 14:53:04,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:04,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486021579] [2020-10-28 14:53:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:04,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:53:04,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:04,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-28 14:53:04,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:04,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:04,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:04,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:04,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:04,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:04,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:04,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:04,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:04,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:04,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:04,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486021579] [2020-10-28 14:53:04,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:04,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:04,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511759344] [2020-10-28 14:53:04,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:04,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:04,648 INFO L87 Difference]: Start difference. First operand 1900 states and 3244 transitions. Second operand 4 states. [2020-10-28 14:53:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:04,915 INFO L93 Difference]: Finished difference Result 2862 states and 4883 transitions. [2020-10-28 14:53:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:04,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 14:53:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:04,925 INFO L225 Difference]: With dead ends: 2862 [2020-10-28 14:53:04,925 INFO L226 Difference]: Without dead ends: 1931 [2020-10-28 14:53:04,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-10-28 14:53:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1930. [2020-10-28 14:53:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-28 14:53:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3256 transitions. [2020-10-28 14:53:05,004 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3256 transitions. Word has length 31 [2020-10-28 14:53:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:05,004 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 3256 transitions. [2020-10-28 14:53:05,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3256 transitions. [2020-10-28 14:53:05,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:53:05,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:05,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:05,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:53:05,009 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash -267448751, now seen corresponding path program 1 times [2020-10-28 14:53:05,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:05,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020340423] [2020-10-28 14:53:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:05,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:05,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:05,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:05,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:05,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:53:05,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:05,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-28 14:53:05,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:05,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:05,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:05,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:05,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:05,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:05,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:05,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:05,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:05,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020340423] [2020-10-28 14:53:05,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:05,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:05,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458183356] [2020-10-28 14:53:05,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:05,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:05,323 INFO L87 Difference]: Start difference. First operand 1930 states and 3256 transitions. Second operand 4 states. [2020-10-28 14:53:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:05,574 INFO L93 Difference]: Finished difference Result 4558 states and 7739 transitions. [2020-10-28 14:53:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:05,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 14:53:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:05,589 INFO L225 Difference]: With dead ends: 4558 [2020-10-28 14:53:05,589 INFO L226 Difference]: Without dead ends: 2667 [2020-10-28 14:53:05,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2020-10-28 14:53:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2666. [2020-10-28 14:53:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2666 states. [2020-10-28 14:53:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 4488 transitions. [2020-10-28 14:53:05,723 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 4488 transitions. Word has length 31 [2020-10-28 14:53:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:05,723 INFO L481 AbstractCegarLoop]: Abstraction has 2666 states and 4488 transitions. [2020-10-28 14:53:05,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 4488 transitions. [2020-10-28 14:53:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:53:05,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:05,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:05,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:53:05,727 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:05,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1994588126, now seen corresponding path program 1 times [2020-10-28 14:53:05,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:05,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421659810] [2020-10-28 14:53:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:05,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:05,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:06,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:06,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:53:06,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:06,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-28 14:53:06,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:06,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:06,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:06,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:06,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:06,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:06,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:06,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:06,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:06,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:06,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421659810] [2020-10-28 14:53:06,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:06,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651393099] [2020-10-28 14:53:06,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:06,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:06,109 INFO L87 Difference]: Start difference. First operand 2666 states and 4488 transitions. Second operand 4 states. [2020-10-28 14:53:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:06,440 INFO L93 Difference]: Finished difference Result 4846 states and 8267 transitions. [2020-10-28 14:53:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:06,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:53:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:06,466 INFO L225 Difference]: With dead ends: 4846 [2020-10-28 14:53:06,466 INFO L226 Difference]: Without dead ends: 4843 [2020-10-28 14:53:06,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2020-10-28 14:53:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 3818. [2020-10-28 14:53:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3818 states. [2020-10-28 14:53:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 6280 transitions. [2020-10-28 14:53:06,616 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 6280 transitions. Word has length 32 [2020-10-28 14:53:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:06,616 INFO L481 AbstractCegarLoop]: Abstraction has 3818 states and 6280 transitions. [2020-10-28 14:53:06,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 6280 transitions. [2020-10-28 14:53:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:53:06,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:06,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:06,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:53:06,623 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash 443420, now seen corresponding path program 1 times [2020-10-28 14:53:06,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:06,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490507671] [2020-10-28 14:53:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:06,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:06,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:06,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:06,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:06,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:53:06,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:06,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-28 14:53:06,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:06,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:06,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:06,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:06,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:06,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:07,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:07,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:07,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:07,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:07,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:07,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:07,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:07,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:07,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:07,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:07,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:07,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490507671] [2020-10-28 14:53:07,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:07,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:07,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324143114] [2020-10-28 14:53:07,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:07,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:07,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:07,048 INFO L87 Difference]: Start difference. First operand 3818 states and 6280 transitions. Second operand 4 states. [2020-10-28 14:53:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:07,429 INFO L93 Difference]: Finished difference Result 9006 states and 14923 transitions. [2020-10-28 14:53:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:07,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:53:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:07,478 INFO L225 Difference]: With dead ends: 9006 [2020-10-28 14:53:07,478 INFO L226 Difference]: Without dead ends: 5227 [2020-10-28 14:53:07,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2020-10-28 14:53:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 5226. [2020-10-28 14:53:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5226 states. [2020-10-28 14:53:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 8584 transitions. [2020-10-28 14:53:07,699 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 8584 transitions. Word has length 32 [2020-10-28 14:53:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:07,699 INFO L481 AbstractCegarLoop]: Abstraction has 5226 states and 8584 transitions. [2020-10-28 14:53:07,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 8584 transitions. [2020-10-28 14:53:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:07,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:07,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:07,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:53:07,709 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:07,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1709321406, now seen corresponding path program 1 times [2020-10-28 14:53:07,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:07,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885867966] [2020-10-28 14:53:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:07,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:08,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:08,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:08,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:53:08,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-28 14:53:08,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:08,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:08,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:08,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:53:08,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:08,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:08,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:08,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:08,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:08,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:08,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:08,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:08,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:08,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:08,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:08,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:08,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:08,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:08,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885867966] [2020-10-28 14:53:08,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:08,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:08,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531675706] [2020-10-28 14:53:08,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:08,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:08,373 INFO L87 Difference]: Start difference. First operand 5226 states and 8584 transitions. Second operand 4 states. [2020-10-28 14:53:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:08,772 INFO L93 Difference]: Finished difference Result 9390 states and 15627 transitions. [2020-10-28 14:53:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:08,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:53:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:08,794 INFO L225 Difference]: With dead ends: 9390 [2020-10-28 14:53:08,794 INFO L226 Difference]: Without dead ends: 9387 [2020-10-28 14:53:08,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9387 states. [2020-10-28 14:53:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9387 to 7594. [2020-10-28 14:53:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7594 states. [2020-10-28 14:53:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 12168 transitions. [2020-10-28 14:53:09,067 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 12168 transitions. Word has length 33 [2020-10-28 14:53:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:09,067 INFO L481 AbstractCegarLoop]: Abstraction has 7594 states and 12168 transitions. [2020-10-28 14:53:09,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 12168 transitions. [2020-10-28 14:53:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:09,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:09,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:09,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:53:09,079 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:09,080 INFO L82 PathProgramCache]: Analyzing trace with hash -284823300, now seen corresponding path program 1 times [2020-10-28 14:53:09,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:09,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967048307] [2020-10-28 14:53:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:09,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:09,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:09,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:09,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:09,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:09,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:09,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:53:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-28 14:53:09,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:09,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:09,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:09,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:09,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:09,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:09,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:09,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:09,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:09,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:09,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967048307] [2020-10-28 14:53:09,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:09,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:09,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981326997] [2020-10-28 14:53:09,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:09,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:09,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:09,700 INFO L87 Difference]: Start difference. First operand 7594 states and 12168 transitions. Second operand 4 states. [2020-10-28 14:53:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:10,007 INFO L93 Difference]: Finished difference Result 11406 states and 18251 transitions. [2020-10-28 14:53:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:10,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:53:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:10,024 INFO L225 Difference]: With dead ends: 11406 [2020-10-28 14:53:10,024 INFO L226 Difference]: Without dead ends: 7691 [2020-10-28 14:53:10,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7691 states. [2020-10-28 14:53:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7691 to 7690. [2020-10-28 14:53:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7690 states. [2020-10-28 14:53:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 12168 transitions. [2020-10-28 14:53:10,366 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 12168 transitions. Word has length 33 [2020-10-28 14:53:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:10,366 INFO L481 AbstractCegarLoop]: Abstraction has 7690 states and 12168 transitions. [2020-10-28 14:53:10,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 12168 transitions. [2020-10-28 14:53:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:10,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:10,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:10,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:53:10,380 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1973767042, now seen corresponding path program 1 times [2020-10-28 14:53:10,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:10,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508439283] [2020-10-28 14:53:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:10,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:10,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:10,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:10,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:10,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:10,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:10,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:10,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-28 14:53:10,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:10,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:10,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:10,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:10,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:10,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:10,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:10,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:10,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:10,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:10,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:10,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:10,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:10,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:10,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:10,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508439283] [2020-10-28 14:53:10,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:10,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688825102] [2020-10-28 14:53:10,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:10,803 INFO L87 Difference]: Start difference. First operand 7690 states and 12168 transitions. Second operand 4 states. [2020-10-28 14:53:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:11,083 INFO L93 Difference]: Finished difference Result 11406 states and 17963 transitions. [2020-10-28 14:53:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:11,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:53:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:11,099 INFO L225 Difference]: With dead ends: 11406 [2020-10-28 14:53:11,099 INFO L226 Difference]: Without dead ends: 7691 [2020-10-28 14:53:11,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7691 states. [2020-10-28 14:53:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7691 to 7690. [2020-10-28 14:53:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7690 states. [2020-10-28 14:53:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 11976 transitions. [2020-10-28 14:53:11,369 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 11976 transitions. Word has length 33 [2020-10-28 14:53:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:11,369 INFO L481 AbstractCegarLoop]: Abstraction has 7690 states and 11976 transitions. [2020-10-28 14:53:11,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 11976 transitions. [2020-10-28 14:53:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:11,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:11,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:11,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:53:11,381 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1754912324, now seen corresponding path program 1 times [2020-10-28 14:53:11,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:11,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116875304] [2020-10-28 14:53:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:11,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:11,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-28 14:53:11,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:11,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:53:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:11,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:11,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:11,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:11,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:11,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:11,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:53:11,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:11,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:11,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:11,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:11,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:11,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:11,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116875304] [2020-10-28 14:53:11,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:11,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:11,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721949356] [2020-10-28 14:53:11,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:11,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:11,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:11,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:11,591 INFO L87 Difference]: Start difference. First operand 7690 states and 11976 transitions. Second operand 4 states. [2020-10-28 14:53:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:11,965 INFO L93 Difference]: Finished difference Result 17934 states and 28107 transitions. [2020-10-28 14:53:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:11,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:53:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:11,985 INFO L225 Difference]: With dead ends: 17934 [2020-10-28 14:53:11,986 INFO L226 Difference]: Without dead ends: 10379 [2020-10-28 14:53:12,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2020-10-28 14:53:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10378. [2020-10-28 14:53:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10378 states. [2020-10-28 14:53:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10378 states to 10378 states and 16136 transitions. [2020-10-28 14:53:12,335 INFO L78 Accepts]: Start accepts. Automaton has 10378 states and 16136 transitions. Word has length 33 [2020-10-28 14:53:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:12,336 INFO L481 AbstractCegarLoop]: Abstraction has 10378 states and 16136 transitions. [2020-10-28 14:53:12,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 10378 states and 16136 transitions. [2020-10-28 14:53:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:12,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:12,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:12,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:53:12,347 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1167088535, now seen corresponding path program 1 times [2020-10-28 14:53:12,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:12,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170070717] [2020-10-28 14:53:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:12,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:12,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:12,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-28 14:53:12,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:12,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:12,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:12,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:12,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:12,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:12,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:12,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:12,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:12,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:12,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:12,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170070717] [2020-10-28 14:53:12,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:12,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:12,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343929866] [2020-10-28 14:53:12,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:12,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:12,670 INFO L87 Difference]: Start difference. First operand 10378 states and 16136 transitions. Second operand 4 states. [2020-10-28 14:53:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:13,179 INFO L93 Difference]: Finished difference Result 18318 states and 28939 transitions. [2020-10-28 14:53:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:13,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:13,214 INFO L225 Difference]: With dead ends: 18318 [2020-10-28 14:53:13,216 INFO L226 Difference]: Without dead ends: 18315 [2020-10-28 14:53:13,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18315 states. [2020-10-28 14:53:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18315 to 15242. [2020-10-28 14:53:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15242 states. [2020-10-28 14:53:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15242 states to 15242 states and 23048 transitions. [2020-10-28 14:53:13,610 INFO L78 Accepts]: Start accepts. Automaton has 15242 states and 23048 transitions. Word has length 34 [2020-10-28 14:53:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:13,610 INFO L481 AbstractCegarLoop]: Abstraction has 15242 states and 23048 transitions. [2020-10-28 14:53:13,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 15242 states and 23048 transitions. [2020-10-28 14:53:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:13,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:13,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:13,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:53:13,633 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:13,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1133734055, now seen corresponding path program 1 times [2020-10-28 14:53:13,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:13,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866191787] [2020-10-28 14:53:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:13,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:14,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-28 14:53:14,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:53:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:14,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:14,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:14,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:14,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:14,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:14,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:14,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:14,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866191787] [2020-10-28 14:53:14,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:14,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:14,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274154333] [2020-10-28 14:53:14,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:14,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:14,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:14,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:14,084 INFO L87 Difference]: Start difference. First operand 15242 states and 23048 transitions. Second operand 4 states. [2020-10-28 14:53:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:14,514 INFO L93 Difference]: Finished difference Result 22798 states and 34379 transitions. [2020-10-28 14:53:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:14,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:14,547 INFO L225 Difference]: With dead ends: 22798 [2020-10-28 14:53:14,547 INFO L226 Difference]: Without dead ends: 15371 [2020-10-28 14:53:14,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2020-10-28 14:53:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 15370. [2020-10-28 14:53:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15370 states. [2020-10-28 14:53:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 22920 transitions. [2020-10-28 14:53:15,002 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 22920 transitions. Word has length 34 [2020-10-28 14:53:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:15,002 INFO L481 AbstractCegarLoop]: Abstraction has 15370 states and 22920 transitions. [2020-10-28 14:53:15,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 22920 transitions. [2020-10-28 14:53:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:15,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:15,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:15,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:53:15,027 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -555209687, now seen corresponding path program 1 times [2020-10-28 14:53:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:15,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264730282] [2020-10-28 14:53:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:15,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:15,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-28 14:53:15,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:15,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:15,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:15,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:15,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:15,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:15,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:15,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:15,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264730282] [2020-10-28 14:53:15,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:15,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:15,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431411031] [2020-10-28 14:53:15,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:15,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:15,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:15,244 INFO L87 Difference]: Start difference. First operand 15370 states and 22920 transitions. Second operand 4 states. [2020-10-28 14:53:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,679 INFO L93 Difference]: Finished difference Result 22798 states and 33803 transitions. [2020-10-28 14:53:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,709 INFO L225 Difference]: With dead ends: 22798 [2020-10-28 14:53:15,709 INFO L226 Difference]: Without dead ends: 15371 [2020-10-28 14:53:15,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2020-10-28 14:53:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 15370. [2020-10-28 14:53:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15370 states. [2020-10-28 14:53:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 22536 transitions. [2020-10-28 14:53:16,032 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 22536 transitions. Word has length 34 [2020-10-28 14:53:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,032 INFO L481 AbstractCegarLoop]: Abstraction has 15370 states and 22536 transitions. [2020-10-28 14:53:16,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 22536 transitions. [2020-10-28 14:53:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:16,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:16,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:53:16,054 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash -132507861, now seen corresponding path program 1 times [2020-10-28 14:53:16,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750602163] [2020-10-28 14:53:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:16,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:16,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-28 14:53:16,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:16,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:16,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:16,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750602163] [2020-10-28 14:53:16,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066587959] [2020-10-28 14:53:16,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,225 INFO L87 Difference]: Start difference. First operand 15370 states and 22536 transitions. Second operand 4 states. [2020-10-28 14:53:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,768 INFO L93 Difference]: Finished difference Result 35598 states and 52491 transitions. [2020-10-28 14:53:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,808 INFO L225 Difference]: With dead ends: 35598 [2020-10-28 14:53:16,809 INFO L226 Difference]: Without dead ends: 20491 [2020-10-28 14:53:16,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2020-10-28 14:53:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20490. [2020-10-28 14:53:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20490 states. [2020-10-28 14:53:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20490 states to 20490 states and 29960 transitions. [2020-10-28 14:53:17,427 INFO L78 Accepts]: Start accepts. Automaton has 20490 states and 29960 transitions. Word has length 34 [2020-10-28 14:53:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,428 INFO L481 AbstractCegarLoop]: Abstraction has 20490 states and 29960 transitions. [2020-10-28 14:53:17,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20490 states and 29960 transitions. [2020-10-28 14:53:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:17,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:17,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:53:17,446 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1882820133, now seen corresponding path program 1 times [2020-10-28 14:53:17,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145154809] [2020-10-28 14:53:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:17,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 14:53:17,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:17,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:17,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145154809] [2020-10-28 14:53:17,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611949466] [2020-10-28 14:53:17,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,649 INFO L87 Difference]: Start difference. First operand 20490 states and 29960 transitions. Second operand 4 states. [2020-10-28 14:53:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,126 INFO L93 Difference]: Finished difference Result 30478 states and 44299 transitions. [2020-10-28 14:53:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,169 INFO L225 Difference]: With dead ends: 30478 [2020-10-28 14:53:18,169 INFO L226 Difference]: Without dead ends: 20491 [2020-10-28 14:53:18,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2020-10-28 14:53:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20490. [2020-10-28 14:53:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20490 states. [2020-10-28 14:53:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20490 states to 20490 states and 29448 transitions. [2020-10-28 14:53:18,734 INFO L78 Accepts]: Start accepts. Automaton has 20490 states and 29448 transitions. Word has length 35 [2020-10-28 14:53:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:18,734 INFO L481 AbstractCegarLoop]: Abstraction has 20490 states and 29448 transitions. [2020-10-28 14:53:18,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 20490 states and 29448 transitions. [2020-10-28 14:53:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:18,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:18,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:18,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:53:18,748 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2023368743, now seen corresponding path program 1 times [2020-10-28 14:53:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:18,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761679163] [2020-10-28 14:53:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:18,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-28 14:53:18,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:18,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:18,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:18,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:18,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:18,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761679163] [2020-10-28 14:53:18,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:18,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813017233] [2020-10-28 14:53:18,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:18,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:18,882 INFO L87 Difference]: Start difference. First operand 20490 states and 29448 transitions. Second operand 4 states. [2020-10-28 14:53:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:19,425 INFO L93 Difference]: Finished difference Result 30734 states and 44043 transitions. [2020-10-28 14:53:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:19,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:19,461 INFO L225 Difference]: With dead ends: 30734 [2020-10-28 14:53:19,462 INFO L226 Difference]: Without dead ends: 20747 [2020-10-28 14:53:19,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2020-10-28 14:53:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20746. [2020-10-28 14:53:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20746 states. [2020-10-28 14:53:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20746 states to 20746 states and 29448 transitions. [2020-10-28 14:53:20,100 INFO L78 Accepts]: Start accepts. Automaton has 20746 states and 29448 transitions. Word has length 35 [2020-10-28 14:53:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,100 INFO L481 AbstractCegarLoop]: Abstraction has 20746 states and 29448 transitions. [2020-10-28 14:53:20,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20746 states and 29448 transitions. [2020-10-28 14:53:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:20,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:20,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:20,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:53:20,118 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash 334425001, now seen corresponding path program 1 times [2020-10-28 14:53:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:20,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131000256] [2020-10-28 14:53:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:20,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:53:20,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:53:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:20,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:20,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:20,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:20,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:20,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:20,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:20,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131000256] [2020-10-28 14:53:20,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:20,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:20,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649668452] [2020-10-28 14:53:20,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:20,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:20,227 INFO L87 Difference]: Start difference. First operand 20746 states and 29448 transitions. Second operand 4 states. [2020-10-28 14:53:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:21,062 INFO L93 Difference]: Finished difference Result 60686 states and 85259 transitions. [2020-10-28 14:53:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:21,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:21,126 INFO L225 Difference]: With dead ends: 60686 [2020-10-28 14:53:21,126 INFO L226 Difference]: Without dead ends: 40459 [2020-10-28 14:53:21,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2020-10-28 14:53:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40458. [2020-10-28 14:53:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40458 states. [2020-10-28 14:53:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40458 states to 40458 states and 55816 transitions. [2020-10-28 14:53:22,171 INFO L78 Accepts]: Start accepts. Automaton has 40458 states and 55816 transitions. Word has length 35 [2020-10-28 14:53:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:22,171 INFO L481 AbstractCegarLoop]: Abstraction has 40458 states and 55816 transitions. [2020-10-28 14:53:22,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 40458 states and 55816 transitions. [2020-10-28 14:53:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:22,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:22,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:22,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:53:22,190 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1966397589, now seen corresponding path program 1 times [2020-10-28 14:53:22,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:22,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356978579] [2020-10-28 14:53:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:22,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 14:53:22,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:53:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:22,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:22,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:22,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:22,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:22,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:22,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:22,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356978579] [2020-10-28 14:53:22,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:22,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:22,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038004720] [2020-10-28 14:53:22,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:22,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:22,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:22,291 INFO L87 Difference]: Start difference. First operand 40458 states and 55816 transitions. Second operand 4 states. [2020-10-28 14:53:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:23,262 INFO L93 Difference]: Finished difference Result 45582 states and 65035 transitions. [2020-10-28 14:53:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:23,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:23,310 INFO L225 Difference]: With dead ends: 45582 [2020-10-28 14:53:23,310 INFO L226 Difference]: Without dead ends: 45579 [2020-10-28 14:53:23,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45579 states. [2020-10-28 14:53:24,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45579 to 40458. [2020-10-28 14:53:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40458 states. [2020-10-28 14:53:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40458 states to 40458 states and 55304 transitions. [2020-10-28 14:53:24,280 INFO L78 Accepts]: Start accepts. Automaton has 40458 states and 55304 transitions. Word has length 35 [2020-10-28 14:53:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:24,281 INFO L481 AbstractCegarLoop]: Abstraction has 40458 states and 55304 transitions. [2020-10-28 14:53:24,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 40458 states and 55304 transitions. [2020-10-28 14:53:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:24,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:24,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:24,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:53:24,303 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1783903796, now seen corresponding path program 1 times [2020-10-28 14:53:24,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:24,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137046883] [2020-10-28 14:53:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:24,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 14:53:24,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:24,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:53:24,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:24,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:24,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:24,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:24,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:24,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:24,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:24,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137046883] [2020-10-28 14:53:24,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:24,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:24,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583702892] [2020-10-28 14:53:24,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:24,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:24,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:24,400 INFO L87 Difference]: Start difference. First operand 40458 states and 55304 transitions. Second operand 4 states. [2020-10-28 14:53:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:25,760 INFO L93 Difference]: Finished difference Result 69134 states and 96267 transitions. [2020-10-28 14:53:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:25,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:25,850 INFO L225 Difference]: With dead ends: 69134 [2020-10-28 14:53:25,850 INFO L226 Difference]: Without dead ends: 69131 [2020-10-28 14:53:25,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69131 states. [2020-10-28 14:53:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69131 to 60938. [2020-10-28 14:53:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60938 states. [2020-10-28 14:53:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60938 states to 60938 states and 80904 transitions. [2020-10-28 14:53:27,131 INFO L78 Accepts]: Start accepts. Automaton has 60938 states and 80904 transitions. Word has length 36 [2020-10-28 14:53:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:27,131 INFO L481 AbstractCegarLoop]: Abstraction has 60938 states and 80904 transitions. [2020-10-28 14:53:27,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60938 states and 80904 transitions. [2020-10-28 14:53:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:27,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:27,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:27,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:53:27,160 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash -210240910, now seen corresponding path program 1 times [2020-10-28 14:53:27,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:27,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367708986] [2020-10-28 14:53:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:27,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:27,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:27,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:27,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:27,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 14:53:27,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:27,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:53:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:27,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:27,481 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-28 14:53:27,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:27,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:27,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:27,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:53:27,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:27,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:27,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:27,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:27,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:53:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:27,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367708986] [2020-10-28 14:53:27,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:27,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:27,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444808450] [2020-10-28 14:53:27,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:27,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:27,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:27,502 INFO L87 Difference]: Start difference. First operand 60938 states and 80904 transitions. Second operand 4 states. [2020-10-28 14:53:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:28,894 INFO L93 Difference]: Finished difference Result 139790 states and 186379 transitions. [2020-10-28 14:53:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:28,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:28,987 INFO L225 Difference]: With dead ends: 139790 [2020-10-28 14:53:28,987 INFO L226 Difference]: Without dead ends: 79371 [2020-10-28 14:53:29,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79371 states. [2020-10-28 14:53:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79371 to 79370. [2020-10-28 14:53:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79370 states. [2020-10-28 14:53:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79370 states to 79370 states and 104456 transitions. [2020-10-28 14:53:30,896 INFO L78 Accepts]: Start accepts. Automaton has 79370 states and 104456 transitions. Word has length 36 [2020-10-28 14:53:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:30,900 INFO L481 AbstractCegarLoop]: Abstraction has 79370 states and 104456 transitions. [2020-10-28 14:53:30,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 79370 states and 104456 transitions. [2020-10-28 14:53:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:53:30,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:30,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:30,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:53:30,939 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:30,939 INFO L82 PathProgramCache]: Analyzing trace with hash -526883244, now seen corresponding path program 1 times [2020-10-28 14:53:30,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:30,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499221993] [2020-10-28 14:53:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:30,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:31,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:31,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:31,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:53:31,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-28 14:53:31,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:31,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:53:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:31,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:31,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:31,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:31,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:31,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:31,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:31,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:31,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:31,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:31,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:31,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:31,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:31,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499221993] [2020-10-28 14:53:31,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:31,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:31,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011645226] [2020-10-28 14:53:31,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:31,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:31,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:31,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:31,280 INFO L87 Difference]: Start difference. First operand 79370 states and 104456 transitions. Second operand 4 states. [2020-10-28 14:53:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:33,244 INFO L93 Difference]: Finished difference Result 133646 states and 178187 transitions. [2020-10-28 14:53:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:33,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-28 14:53:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:33,476 INFO L225 Difference]: With dead ends: 133646 [2020-10-28 14:53:33,477 INFO L226 Difference]: Without dead ends: 133643 [2020-10-28 14:53:33,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:33,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133643 states. [2020-10-28 14:53:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133643 to 121354. [2020-10-28 14:53:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121354 states. [2020-10-28 14:53:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121354 states to 121354 states and 155656 transitions. [2020-10-28 14:53:35,925 INFO L78 Accepts]: Start accepts. Automaton has 121354 states and 155656 transitions. Word has length 37 [2020-10-28 14:53:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:35,925 INFO L481 AbstractCegarLoop]: Abstraction has 121354 states and 155656 transitions. [2020-10-28 14:53:35,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 121354 states and 155656 transitions. [2020-10-28 14:53:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:53:35,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:35,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:35,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:53:35,990 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1773939346, now seen corresponding path program 1 times [2020-10-28 14:53:35,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:35,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368520630] [2020-10-28 14:53:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:53:36,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:36,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 14:53:36,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:36,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:53:36,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:36,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:36,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:36,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:36,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:36,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:36,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:36,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:36,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:36,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:36,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:36,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:36,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368520630] [2020-10-28 14:53:36,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:36,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557486366] [2020-10-28 14:53:36,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:36,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:36,135 INFO L87 Difference]: Start difference. First operand 121354 states and 155656 transitions. Second operand 4 states. [2020-10-28 14:53:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:38,978 INFO L93 Difference]: Finished difference Result 277006 states and 356363 transitions. [2020-10-28 14:53:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:38,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-28 14:53:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:39,176 INFO L225 Difference]: With dead ends: 277006 [2020-10-28 14:53:39,176 INFO L226 Difference]: Without dead ends: 156171 [2020-10-28 14:53:39,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156171 states. [2020-10-28 14:53:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156171 to 156170. [2020-10-28 14:53:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156170 states. [2020-10-28 14:53:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156170 states to 156170 states and 197640 transitions. [2020-10-28 14:53:43,250 INFO L78 Accepts]: Start accepts. Automaton has 156170 states and 197640 transitions. Word has length 37 [2020-10-28 14:53:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:43,250 INFO L481 AbstractCegarLoop]: Abstraction has 156170 states and 197640 transitions. [2020-10-28 14:53:43,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 156170 states and 197640 transitions. [2020-10-28 14:53:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:53:43,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:43,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:43,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:53:43,329 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 853173119, now seen corresponding path program 1 times [2020-10-28 14:53:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:43,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643466029] [2020-10-28 14:53:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:43,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:43,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:43,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:43,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:43,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:53:43,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 14:53:43,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:43,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:53:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:43,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:43,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:43,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:43,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:43,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:43,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:43,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:43,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:43,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643466029] [2020-10-28 14:53:43,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:43,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:43,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897900202] [2020-10-28 14:53:43,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:43,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:43,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:43,515 INFO L87 Difference]: Start difference. First operand 156170 states and 197640 transitions. Second operand 4 states. [2020-10-28 14:53:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:48,058 INFO L93 Difference]: Finished difference Result 258574 states and 328715 transitions. [2020-10-28 14:53:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:48,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-28 14:53:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:48,410 INFO L225 Difference]: With dead ends: 258574 [2020-10-28 14:53:48,410 INFO L226 Difference]: Without dead ends: 258571 [2020-10-28 14:53:48,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258571 states. [2020-10-28 14:53:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258571 to 242186. [2020-10-28 14:53:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242186 states. [2020-10-28 14:53:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242186 states to 242186 states and 300040 transitions. [2020-10-28 14:53:53,496 INFO L78 Accepts]: Start accepts. Automaton has 242186 states and 300040 transitions. Word has length 38 [2020-10-28 14:53:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:53,497 INFO L481 AbstractCegarLoop]: Abstraction has 242186 states and 300040 transitions. [2020-10-28 14:53:53,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 242186 states and 300040 transitions. [2020-10-28 14:53:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:53:53,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:53,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:53,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:53:53,656 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1140971587, now seen corresponding path program 1 times [2020-10-28 14:53:53,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:53,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114037158] [2020-10-28 14:53:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:53,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:53:53,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:53,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:53,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:53,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:53,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:53,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:53,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:53,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:53,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:53,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:53,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114037158] [2020-10-28 14:53:53,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:53,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830442310] [2020-10-28 14:53:53,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:53,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:53,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:53,854 INFO L87 Difference]: Start difference. First operand 242186 states and 300040 transitions. Second operand 4 states. [2020-10-28 14:53:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:59,195 INFO L93 Difference]: Finished difference Result 549390 states and 680971 transitions. [2020-10-28 14:53:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:59,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-28 14:53:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:00,144 INFO L225 Difference]: With dead ends: 549390 [2020-10-28 14:54:00,145 INFO L226 Difference]: Without dead ends: 307723 [2020-10-28 14:54:00,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307723 states. [2020-10-28 14:54:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307723 to 307722. [2020-10-28 14:54:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307722 states. [2020-10-28 14:54:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307722 states to 307722 states and 373768 transitions. [2020-10-28 14:54:08,125 INFO L78 Accepts]: Start accepts. Automaton has 307722 states and 373768 transitions. Word has length 38 [2020-10-28 14:54:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:08,126 INFO L481 AbstractCegarLoop]: Abstraction has 307722 states and 373768 transitions. [2020-10-28 14:54:08,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 307722 states and 373768 transitions. [2020-10-28 14:54:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:54:08,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:08,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:08,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:54:08,330 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash 685257983, now seen corresponding path program 1 times [2020-10-28 14:54:08,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:08,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786822341] [2020-10-28 14:54:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:08,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:54:08,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:54:08,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 14:54:08,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:08,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:54:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:54:08,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:08,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:08,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:08,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:08,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:08,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:08,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:08,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786822341] [2020-10-28 14:54:08,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:08,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:08,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129524291] [2020-10-28 14:54:08,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:08,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:08,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:08,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:08,642 INFO L87 Difference]: Start difference. First operand 307722 states and 373768 transitions. Second operand 4 states. [2020-10-28 14:54:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:17,812 INFO L93 Difference]: Finished difference Result 500237 states and 603146 transitions. [2020-10-28 14:54:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:17,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-28 14:54:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:18,606 INFO L225 Difference]: With dead ends: 500237 [2020-10-28 14:54:18,606 INFO L226 Difference]: Without dead ends: 500234 [2020-10-28 14:54:18,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500234 states. [2020-10-28 14:54:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500234 to 483850. [2020-10-28 14:54:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483850 states. [2020-10-28 14:54:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483850 states to 483850 states and 578568 transitions. [2020-10-28 14:54:28,912 INFO L78 Accepts]: Start accepts. Automaton has 483850 states and 578568 transitions. Word has length 39 [2020-10-28 14:54:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:28,913 INFO L481 AbstractCegarLoop]: Abstraction has 483850 states and 578568 transitions. [2020-10-28 14:54:28,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 483850 states and 578568 transitions. [2020-10-28 14:54:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:54:29,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:29,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:29,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:54:29,866 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:29,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1308886723, now seen corresponding path program 1 times [2020-10-28 14:54:29,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:29,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803768259] [2020-10-28 14:54:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:29,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:29,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:29,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:29,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:54:30,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:54:30,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-28 14:54:30,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:54:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:54:30,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:30,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:30,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:30,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:30,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:30,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:30,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803768259] [2020-10-28 14:54:30,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:30,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:30,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117799782] [2020-10-28 14:54:30,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:30,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:30,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:30,177 INFO L87 Difference]: Start difference. First operand 483850 states and 578568 transitions. Second operand 4 states. [2020-10-28 14:54:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:36,213 INFO L93 Difference]: Finished difference Result 722958 states and 860171 transitions. [2020-10-28 14:54:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:36,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-28 14:54:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:37,124 INFO L225 Difference]: With dead ends: 722958 [2020-10-28 14:54:37,125 INFO L226 Difference]: Without dead ends: 485387 [2020-10-28 14:54:37,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485387 states. [2020-10-28 14:54:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485387 to 485386. [2020-10-28 14:54:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485386 states. [2020-10-28 14:54:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485386 states to 485386 states and 569352 transitions. [2020-10-28 14:54:47,746 INFO L78 Accepts]: Start accepts. Automaton has 485386 states and 569352 transitions. Word has length 39 [2020-10-28 14:54:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:47,747 INFO L481 AbstractCegarLoop]: Abstraction has 485386 states and 569352 transitions. [2020-10-28 14:54:47,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 485386 states and 569352 transitions. [2020-10-28 14:54:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:54:48,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:48,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:48,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:54:48,468 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash -886184897, now seen corresponding path program 1 times [2020-10-28 14:54:48,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:48,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092564420] [2020-10-28 14:54:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:48,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:48,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:48,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:48,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:48,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:54:48,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:54:48,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-28 14:54:48,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:48,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:54:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:54:48,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:54:48,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:48,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:48,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:48,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:48,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:48,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:48,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:48,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:48,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:48,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:48,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:48,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:48,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092564420] [2020-10-28 14:54:48,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:48,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:48,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012287224] [2020-10-28 14:54:48,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:48,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:48,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:48,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:48,991 INFO L87 Difference]: Start difference. First operand 485386 states and 569352 transitions. Second operand 4 states. [2020-10-28 14:54:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:58,164 INFO L93 Difference]: Finished difference Result 725006 states and 845835 transitions. [2020-10-28 14:54:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:58,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-28 14:54:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:59,037 INFO L225 Difference]: With dead ends: 725006 [2020-10-28 14:54:59,037 INFO L226 Difference]: Without dead ends: 487435 [2020-10-28 14:54:59,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487435 states. [2020-10-28 14:55:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487435 to 487434. [2020-10-28 14:55:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487434 states. [2020-10-28 14:55:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487434 states to 487434 states and 561160 transitions. [2020-10-28 14:55:09,676 INFO L78 Accepts]: Start accepts. Automaton has 487434 states and 561160 transitions. Word has length 39 [2020-10-28 14:55:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:09,676 INFO L481 AbstractCegarLoop]: Abstraction has 487434 states and 561160 transitions. [2020-10-28 14:55:09,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:55:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 487434 states and 561160 transitions. [2020-10-28 14:55:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:55:10,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:10,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:10,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:55:10,065 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1703833347, now seen corresponding path program 1 times [2020-10-28 14:55:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:10,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237395894] [2020-10-28 14:55:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:10,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:10,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:10,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:55:10,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:10,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 14:55:10,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:10,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:10,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:55:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:55:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:55:10,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:10,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:10,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:10,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:10,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:10,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:10,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:10,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237395894] [2020-10-28 14:55:10,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:55:10,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:55:10,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985926748] [2020-10-28 14:55:10,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:55:10,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:55:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:55:10,196 INFO L87 Difference]: Start difference. First operand 487434 states and 561160 transitions. Second operand 4 states. [2020-10-28 14:55:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:22,367 INFO L93 Difference]: Finished difference Result 1093642 states and 1249288 transitions. [2020-10-28 14:55:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:55:22,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-28 14:55:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:22,368 INFO L225 Difference]: With dead ends: 1093642 [2020-10-28 14:55:22,368 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:55:23,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:55:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:55:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:55:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:55:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:55:23,327 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-10-28 14:55:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:23,327 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:55:23,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:55:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:55:23,327 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:55:23,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:55:23,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.