/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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:50:44,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:50:44,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:50:44,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:50:44,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:50:44,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:50:44,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:50:44,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:50:44,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:50:44,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:50:44,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:50:44,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:50:44,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:50:44,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:50:44,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:50:44,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:50:44,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:50:44,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:50:44,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:50:44,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:50:44,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:50:44,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:50:44,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:50:44,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:50:44,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:50:44,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:50:44,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:50:44,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:50:44,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:50:44,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:50:44,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:50:44,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:50:44,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:50:44,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:50:44,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:50:44,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:50:44,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:50:44,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:50:44,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:50:44,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:50:44,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:50:44,847 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 18:50:44,907 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:50:44,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:50:44,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:50:44,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:50:44,914 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:50:44,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:50:44,914 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:50:44,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:50:44,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:50:44,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:50:44,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:50:44,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:50:44,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:50:44,917 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:50:44,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:50:44,917 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:50:44,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:50:44,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:50:44,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:50:44,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:50:44,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:50:44,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:50:44,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:50:44,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:50:44,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:50:44,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:50:44,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:50:44,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:50:44,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:50:44,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:50:45,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:50:45,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:50:45,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:50:45,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:50:45,357 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:50:45,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:50:45,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/789bcadde/82500b9fd0c845a8a1fc3b72b676c52c/FLAGefdfbeb19 [2020-10-28 18:50:46,179 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:50:46,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:50:46,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/789bcadde/82500b9fd0c845a8a1fc3b72b676c52c/FLAGefdfbeb19 [2020-10-28 18:50:46,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/789bcadde/82500b9fd0c845a8a1fc3b72b676c52c [2020-10-28 18:50:46,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:50:46,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:50:46,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:46,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:50:46,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:50:46,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba20cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46, skipping insertion in model container [2020-10-28 18:50:46,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:50:46,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:50:46,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:46,811 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:50:46,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:46,892 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:50:46,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46 WrapperNode [2020-10-28 18:50:46,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:46,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:50:46,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:50:46,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:50:46,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (1/1) ... [2020-10-28 18:50:46,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:50:46,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:50:46,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:50:46,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:50:46,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (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 18:50:47,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:50:47,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:50:47,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:50:47,041 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:50:47,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:50:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:50:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:50:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:50:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:50:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:50:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:50:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:50:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:50:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:50:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:50:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:50:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:50:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:50:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:50:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:50:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:50:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:50:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:50:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:50:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:50:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:50:47,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:50:47,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:50:47,753 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:50:47,753 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:50:47,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:47 BoogieIcfgContainer [2020-10-28 18:50:47,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:50:47,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:50:47,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:50:47,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:50:47,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:50:46" (1/3) ... [2020-10-28 18:50:47,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a00ab8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:47, skipping insertion in model container [2020-10-28 18:50:47,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:46" (2/3) ... [2020-10-28 18:50:47,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a00ab8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:47, skipping insertion in model container [2020-10-28 18:50:47,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:47" (3/3) ... [2020-10-28 18:50:47,765 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:50:47,779 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:50:47,785 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:50:47,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:50:47,831 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:50:47,831 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:50:47,831 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:50:47,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:50:47,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:50:47,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:50:47,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:50:47,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:50:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-10-28 18:50:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 18:50:47,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:47,865 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, 1, 1, 1, 1] [2020-10-28 18:50:47,866 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash -734565587, now seen corresponding path program 1 times [2020-10-28 18:50:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111989337] [2020-10-28 18:50:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:48,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:48,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:50,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:50,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 18:50:50,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:50:50,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-10-28 18:50:50,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:50,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 18:50:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:50:50,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:50:50,283 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:50:50,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:50,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:50,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:50,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:50,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:50,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:50:50,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:50,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:50,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:50,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:50,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:50,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:50,328 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 18:50:50,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111989337] [2020-10-28 18:50:50,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:50,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:50,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155976419] [2020-10-28 18:50:50,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:50,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:50,357 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 4 states. [2020-10-28 18:50:50,567 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:50:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:51,196 INFO L93 Difference]: Finished difference Result 218 states and 339 transitions. [2020-10-28 18:50:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:50:51,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 18:50:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:51,210 INFO L225 Difference]: With dead ends: 218 [2020-10-28 18:50:51,210 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 18:50:51,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:50:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 18:50:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-28 18:50:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 18:50:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 199 transitions. [2020-10-28 18:50:51,278 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 199 transitions. Word has length 43 [2020-10-28 18:50:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:51,278 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 199 transitions. [2020-10-28 18:50:51,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:50:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 199 transitions. [2020-10-28 18:50:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 18:50:51,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:51,281 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, 1, 1, 1, 1, 1] [2020-10-28 18:50:51,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:50:51,282 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:51,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:51,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1059309629, now seen corresponding path program 1 times [2020-10-28 18:50:51,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:51,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700101570] [2020-10-28 18:50:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:51,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:51,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:51,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 18:50:51,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:50:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-28 18:50:51,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:51,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 18:50:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:50:51,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:52,129 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:50:52,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:52,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:52,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:52,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:52,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:52,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:50:52,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:52,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:52,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:52,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:52,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:52,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:50:52,164 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 18:50:52,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700101570] [2020-10-28 18:50:52,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:52,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178974783] [2020-10-28 18:50:52,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:52,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:52,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:52,168 INFO L87 Difference]: Start difference. First operand 135 states and 199 transitions. Second operand 4 states. [2020-10-28 18:50:52,341 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:50:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:52,775 INFO L93 Difference]: Finished difference Result 325 states and 497 transitions. [2020-10-28 18:50:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:50:52,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 18:50:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:52,779 INFO L225 Difference]: With dead ends: 325 [2020-10-28 18:50:52,779 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 18:50:52,781 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 18:50:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 18:50:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2020-10-28 18:50:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-28 18:50:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 318 transitions. [2020-10-28 18:50:52,815 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 318 transitions. Word has length 44 [2020-10-28 18:50:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:52,815 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 318 transitions. [2020-10-28 18:50:52,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:50:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 318 transitions. [2020-10-28 18:50:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 18:50:52,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:52,818 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, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:52,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:50:52,818 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1506192612, now seen corresponding path program 1 times [2020-10-28 18:50:52,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:52,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744762526] [2020-10-28 18:50:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:52,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:53,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:53,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 18:50:53,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:50:53,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-28 18:50:53,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:53,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:53,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:50:53,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:50:53,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:50:53,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:50:53,933 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:50:53,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:53,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:53,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:53,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:53,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:53,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:50:53,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:53,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:53,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:53,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:53,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:53,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:53,969 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 18:50:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744762526] [2020-10-28 18:50:53,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:53,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:50:53,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892435721] [2020-10-28 18:50:53,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:50:53,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:53,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:50:53,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:50:53,974 INFO L87 Difference]: Start difference. First operand 211 states and 318 transitions. Second operand 6 states. [2020-10-28 18:50:54,163 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:50:54,745 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:50:54,908 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:50:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:54,954 INFO L93 Difference]: Finished difference Result 959 states and 1494 transitions. [2020-10-28 18:50:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:50:54,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 18:50:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:54,960 INFO L225 Difference]: With dead ends: 959 [2020-10-28 18:50:54,960 INFO L226 Difference]: Without dead ends: 772 [2020-10-28 18:50:54,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:50:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-10-28 18:50:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 395. [2020-10-28 18:50:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-28 18:50:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 602 transitions. [2020-10-28 18:50:55,022 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 602 transitions. Word has length 45 [2020-10-28 18:50:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:55,023 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 602 transitions. [2020-10-28 18:50:55,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:50:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 602 transitions. [2020-10-28 18:50:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 18:50:55,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:55,025 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:55,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:50:55,026 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1127369728, now seen corresponding path program 1 times [2020-10-28 18:50:55,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:55,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422535860] [2020-10-28 18:50:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:55,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:55,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:55,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 18:50:55,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:50:55,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-28 18:50:55,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:55,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:50:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:50:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:50:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 18:50:55,868 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:50:55,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:55,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:55,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:55,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:55,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:50:55,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:55,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:55,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:55,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:55,909 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 18:50:55,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422535860] [2020-10-28 18:50:55,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:55,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:50:55,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125984974] [2020-10-28 18:50:55,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:50:55,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:50:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:50:55,915 INFO L87 Difference]: Start difference. First operand 395 states and 602 transitions. Second operand 6 states. [2020-10-28 18:50:56,708 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:50:56,969 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:50:57,165 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:50:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:57,593 INFO L93 Difference]: Finished difference Result 1356 states and 2088 transitions. [2020-10-28 18:50:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:50:57,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 18:50:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:57,602 INFO L225 Difference]: With dead ends: 1356 [2020-10-28 18:50:57,602 INFO L226 Difference]: Without dead ends: 985 [2020-10-28 18:50:57,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:50:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-10-28 18:50:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 979. [2020-10-28 18:50:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 979 states. [2020-10-28 18:50:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1498 transitions. [2020-10-28 18:50:57,716 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1498 transitions. Word has length 46 [2020-10-28 18:50:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:57,717 INFO L481 AbstractCegarLoop]: Abstraction has 979 states and 1498 transitions. [2020-10-28 18:50:57,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:50:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1498 transitions. [2020-10-28 18:50:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 18:50:57,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:57,720 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:57,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:50:57,721 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash -739400431, now seen corresponding path program 1 times [2020-10-28 18:50:57,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:57,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809630859] [2020-10-28 18:50:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:57,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:57,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:58,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:58,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 18:50:58,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:50:58,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-28 18:50:58,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:58,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 18:50:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 18:50:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:58,256 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:50:58,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:58,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:58,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:58,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:58,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:58,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:50:58,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:58,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:58,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:58,295 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 18:50:58,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809630859] [2020-10-28 18:50:58,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:58,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759511922] [2020-10-28 18:50:58,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:58,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:58,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:58,298 INFO L87 Difference]: Start difference. First operand 979 states and 1498 transitions. Second operand 4 states. [2020-10-28 18:50:58,487 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:50:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:59,169 INFO L93 Difference]: Finished difference Result 2497 states and 3814 transitions. [2020-10-28 18:50:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:50:59,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 18:50:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:59,179 INFO L225 Difference]: With dead ends: 2497 [2020-10-28 18:50:59,180 INFO L226 Difference]: Without dead ends: 1542 [2020-10-28 18:50:59,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:50:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-10-28 18:50:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1539. [2020-10-28 18:50:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2020-10-28 18:50:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 2314 transitions. [2020-10-28 18:50:59,306 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 2314 transitions. Word has length 47 [2020-10-28 18:50:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:59,306 INFO L481 AbstractCegarLoop]: Abstraction has 1539 states and 2314 transitions. [2020-10-28 18:50:59,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:50:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 2314 transitions. [2020-10-28 18:50:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 18:50:59,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:59,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:59,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:50:59,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:59,310 INFO L82 PathProgramCache]: Analyzing trace with hash 643385751, now seen corresponding path program 1 times [2020-10-28 18:50:59,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:59,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520969714] [2020-10-28 18:50:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:59,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:59,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 18:50:59,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:50:59,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-28 18:50:59,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:59,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:50:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:50:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 18:50:59,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:00,004 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:00,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:00,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:00,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:00,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:00,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:00,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:51:00,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:00,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:00,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:00,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:00,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:00,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:00,074 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 18:51:00,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520969714] [2020-10-28 18:51:00,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:00,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:51:00,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453323148] [2020-10-28 18:51:00,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:00,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:00,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:00,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:00,077 INFO L87 Difference]: Start difference. First operand 1539 states and 2314 transitions. Second operand 6 states. [2020-10-28 18:51:00,283 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:00,974 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:51:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:01,169 INFO L93 Difference]: Finished difference Result 4529 states and 6814 transitions. [2020-10-28 18:51:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:51:01,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-28 18:51:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:01,186 INFO L225 Difference]: With dead ends: 4529 [2020-10-28 18:51:01,186 INFO L226 Difference]: Without dead ends: 3014 [2020-10-28 18:51:01,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:51:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-28 18:51:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3011. [2020-10-28 18:51:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3011 states. [2020-10-28 18:51:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4482 transitions. [2020-10-28 18:51:01,442 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4482 transitions. Word has length 48 [2020-10-28 18:51:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:01,443 INFO L481 AbstractCegarLoop]: Abstraction has 3011 states and 4482 transitions. [2020-10-28 18:51:01,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4482 transitions. [2020-10-28 18:51:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 18:51:01,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:01,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:51:01,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:51:01,445 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:01,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1166417682, now seen corresponding path program 1 times [2020-10-28 18:51:01,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:01,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542205982] [2020-10-28 18:51:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:01,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:01,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:01,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 18:51:01,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:01,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 18:51:01,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:01,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:51:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 18:51:01,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:51:01,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:01,852 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:01,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:01,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:01,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:01,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:01,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:51:01,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:01,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:01,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:01,888 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 18:51:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542205982] [2020-10-28 18:51:01,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:01,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:51:01,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942942051] [2020-10-28 18:51:01,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:51:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:51:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:01,891 INFO L87 Difference]: Start difference. First operand 3011 states and 4482 transitions. Second operand 5 states. [2020-10-28 18:51:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:03,060 INFO L93 Difference]: Finished difference Result 6190 states and 9132 transitions. [2020-10-28 18:51:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:51:03,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-28 18:51:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:03,097 INFO L225 Difference]: With dead ends: 6190 [2020-10-28 18:51:03,097 INFO L226 Difference]: Without dead ends: 6187 [2020-10-28 18:51:03,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2020-10-28 18:51:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 3203. [2020-10-28 18:51:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3203 states. [2020-10-28 18:51:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4674 transitions. [2020-10-28 18:51:03,549 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4674 transitions. Word has length 48 [2020-10-28 18:51:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:03,550 INFO L481 AbstractCegarLoop]: Abstraction has 3203 states and 4674 transitions. [2020-10-28 18:51:03,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:51:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4674 transitions. [2020-10-28 18:51:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 18:51:03,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:03,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:51:03,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:51:03,552 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:03,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2097236675, now seen corresponding path program 1 times [2020-10-28 18:51:03,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:03,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703755276] [2020-10-28 18:51:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:03,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:03,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:03,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 18:51:03,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:03,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 18:51:03,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:03,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:51:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:51:03,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:03,861 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:03,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:03,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:03,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:03,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:03,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:03,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:51:03,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:03,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:03,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:03,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:03,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:03,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:03,899 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 18:51:03,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703755276] [2020-10-28 18:51:03,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:03,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:03,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522286224] [2020-10-28 18:51:03,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:03,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:03,902 INFO L87 Difference]: Start difference. First operand 3203 states and 4674 transitions. Second operand 4 states. [2020-10-28 18:51:04,095 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:51:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:04,866 INFO L93 Difference]: Finished difference Result 7095 states and 10340 transitions. [2020-10-28 18:51:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:04,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 18:51:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:04,889 INFO L225 Difference]: With dead ends: 7095 [2020-10-28 18:51:04,889 INFO L226 Difference]: Without dead ends: 3916 [2020-10-28 18:51:04,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-10-28 18:51:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3893. [2020-10-28 18:51:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3893 states. [2020-10-28 18:51:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5628 transitions. [2020-10-28 18:51:05,326 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5628 transitions. Word has length 49 [2020-10-28 18:51:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:05,327 INFO L481 AbstractCegarLoop]: Abstraction has 3893 states and 5628 transitions. [2020-10-28 18:51:05,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5628 transitions. [2020-10-28 18:51:05,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:51:05,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:05,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:05,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:51:05,331 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1288443405, now seen corresponding path program 1 times [2020-10-28 18:51:05,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:05,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947074441] [2020-10-28 18:51:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:05,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:05,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:05,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:07,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:07,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:51:07,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:51:07,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2351 [2020-10-28 18:51:07,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:07,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:51:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:51:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:51:07,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:07,946 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:07,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:07,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:07,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:07,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:07,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:51:07,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:07,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:07,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:07,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:07,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:07,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 18:51:07,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947074441] [2020-10-28 18:51:07,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:51:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 18:51:07,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384755751] [2020-10-28 18:51:07,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:51:07,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:07,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:51:07,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:07,994 INFO L87 Difference]: Start difference. First operand 3893 states and 5628 transitions. Second operand 5 states. [2020-10-28 18:51:08,221 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:09,013 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:51:09,182 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:51:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:09,676 INFO L93 Difference]: Finished difference Result 9754 states and 14126 transitions. [2020-10-28 18:51:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:51:09,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 18:51:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:09,749 INFO L225 Difference]: With dead ends: 9754 [2020-10-28 18:51:09,750 INFO L226 Difference]: Without dead ends: 6575 [2020-10-28 18:51:09,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:51:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2020-10-28 18:51:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 6525. [2020-10-28 18:51:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6525 states. [2020-10-28 18:51:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 9296 transitions. [2020-10-28 18:51:10,316 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 9296 transitions. Word has length 68 [2020-10-28 18:51:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:10,316 INFO L481 AbstractCegarLoop]: Abstraction has 6525 states and 9296 transitions. [2020-10-28 18:51:10,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:51:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 9296 transitions. [2020-10-28 18:51:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:51:10,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:10,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:10,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:51:10,320 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1643761902, now seen corresponding path program 1 times [2020-10-28 18:51:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:10,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072490867] [2020-10-28 18:51:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:10,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:10,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:10,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:10,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:11,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:15,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:15,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:51:15,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:51:15,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:51:15,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:15,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:51:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:51:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:15,544 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:15,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:15,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:15,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:15,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:15,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:15,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:51:15,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:15,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:15,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:15,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:15,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072490867] [2020-10-28 18:51:15,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:15,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:15,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973541223] [2020-10-28 18:51:15,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:15,600 INFO L87 Difference]: Start difference. First operand 6525 states and 9296 transitions. Second operand 4 states. [2020-10-28 18:51:16,353 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:51:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:16,941 INFO L93 Difference]: Finished difference Result 15348 states and 21878 transitions. [2020-10-28 18:51:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:16,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:51:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:16,980 INFO L225 Difference]: With dead ends: 15348 [2020-10-28 18:51:16,981 INFO L226 Difference]: Without dead ends: 10561 [2020-10-28 18:51:16,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2020-10-28 18:51:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 10558. [2020-10-28 18:51:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10558 states. [2020-10-28 18:51:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10558 states to 10558 states and 14862 transitions. [2020-10-28 18:51:18,208 INFO L78 Accepts]: Start accepts. Automaton has 10558 states and 14862 transitions. Word has length 68 [2020-10-28 18:51:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:18,209 INFO L481 AbstractCegarLoop]: Abstraction has 10558 states and 14862 transitions. [2020-10-28 18:51:18,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10558 states and 14862 transitions. [2020-10-28 18:51:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:51:18,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:18,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:18,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:51:18,215 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash -517063931, now seen corresponding path program 1 times [2020-10-28 18:51:18,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:18,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309896647] [2020-10-28 18:51:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:18,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:18,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:18,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:23,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:23,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:51:23,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:51:23,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:51:23,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:23,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 18:51:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:51:23,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:23,464 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:23,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:23,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:23,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:23,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:23,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:23,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:51:23,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:23,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:23,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:23,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:23,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:23,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:23,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309896647] [2020-10-28 18:51:23,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:23,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:23,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885903939] [2020-10-28 18:51:23,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:23,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:23,513 INFO L87 Difference]: Start difference. First operand 10558 states and 14862 transitions. Second operand 4 states. [2020-10-28 18:51:24,451 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:51:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:24,976 INFO L93 Difference]: Finished difference Result 19117 states and 26907 transitions. [2020-10-28 18:51:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:24,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:51:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:24,997 INFO L225 Difference]: With dead ends: 19117 [2020-10-28 18:51:24,997 INFO L226 Difference]: Without dead ends: 8586 [2020-10-28 18:51:25,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8586 states. [2020-10-28 18:51:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8586 to 8583. [2020-10-28 18:51:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8583 states. [2020-10-28 18:51:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 11910 transitions. [2020-10-28 18:51:25,823 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 11910 transitions. Word has length 68 [2020-10-28 18:51:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:25,823 INFO L481 AbstractCegarLoop]: Abstraction has 8583 states and 11910 transitions. [2020-10-28 18:51:25,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 11910 transitions. [2020-10-28 18:51:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:51:25,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:25,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:25,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:51:25,828 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1634912333, now seen corresponding path program 1 times [2020-10-28 18:51:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:25,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442029459] [2020-10-28 18:51:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:25,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:27,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:51:27,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:51:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-28 18:51:27,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:27,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:51:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:51:27,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:51:27,515 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:27,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:27,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:27,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:27,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:27,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:51:27,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:27,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:27,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:27,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442029459] [2020-10-28 18:51:27,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:27,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:27,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934154861] [2020-10-28 18:51:27,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:27,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:27,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:27,560 INFO L87 Difference]: Start difference. First operand 8583 states and 11910 transitions. Second operand 4 states. [2020-10-28 18:51:27,750 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:51:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:28,851 INFO L93 Difference]: Finished difference Result 16816 states and 23167 transitions. [2020-10-28 18:51:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:28,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:51:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:28,878 INFO L225 Difference]: With dead ends: 16816 [2020-10-28 18:51:28,878 INFO L226 Difference]: Without dead ends: 11576 [2020-10-28 18:51:28,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11576 states. [2020-10-28 18:51:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11576 to 11573. [2020-10-28 18:51:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11573 states. [2020-10-28 18:51:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11573 states to 11573 states and 15765 transitions. [2020-10-28 18:51:29,825 INFO L78 Accepts]: Start accepts. Automaton has 11573 states and 15765 transitions. Word has length 69 [2020-10-28 18:51:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:29,825 INFO L481 AbstractCegarLoop]: Abstraction has 11573 states and 15765 transitions. [2020-10-28 18:51:29,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11573 states and 15765 transitions. [2020-10-28 18:51:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:51:29,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:29,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:29,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:51:29,830 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash 453046090, now seen corresponding path program 1 times [2020-10-28 18:51:29,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:29,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611316504] [2020-10-28 18:51:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:30,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:30,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:31,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:33,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 18:51:34,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:35,039 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:35,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:35,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:35,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:35,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:35,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:35,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:51:35,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:35,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:35,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:35,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:35,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:35,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:35,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611316504] [2020-10-28 18:51:35,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:35,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:35,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951226274] [2020-10-28 18:51:35,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:35,074 INFO L87 Difference]: Start difference. First operand 11573 states and 15765 transitions. Second operand 4 states. [2020-10-28 18:51:35,270 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:51:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:36,637 INFO L93 Difference]: Finished difference Result 19621 states and 26550 transitions. [2020-10-28 18:51:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:36,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:51:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:36,663 INFO L225 Difference]: With dead ends: 19621 [2020-10-28 18:51:36,663 INFO L226 Difference]: Without dead ends: 12096 [2020-10-28 18:51:36,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12096 states. [2020-10-28 18:51:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12096 to 11616. [2020-10-28 18:51:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11616 states. [2020-10-28 18:51:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11616 states to 11616 states and 15579 transitions. [2020-10-28 18:51:37,459 INFO L78 Accepts]: Start accepts. Automaton has 11616 states and 15579 transitions. Word has length 69 [2020-10-28 18:51:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:37,459 INFO L481 AbstractCegarLoop]: Abstraction has 11616 states and 15579 transitions. [2020-10-28 18:51:37,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 11616 states and 15579 transitions. [2020-10-28 18:51:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:51:37,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:37,464 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:37,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:51:37,464 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1247391026, now seen corresponding path program 1 times [2020-10-28 18:51:37,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:37,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053129676] [2020-10-28 18:51:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:37,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:39,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:42,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:51:42,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:51:42,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:51:42,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:42,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:51:42,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:42,815 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:42,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:42,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:42,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:42,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053129676] [2020-10-28 18:51:42,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:51:42,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:51:42,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429692691] [2020-10-28 18:51:42,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:42,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:42,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:42,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:42,879 INFO L87 Difference]: Start difference. First operand 11616 states and 15579 transitions. Second operand 8 states. [2020-10-28 18:51:43,083 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:51:43,972 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:51:44,231 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:45,265 INFO L93 Difference]: Finished difference Result 27506 states and 36749 transitions. [2020-10-28 18:51:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:45,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 18:51:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:45,297 INFO L225 Difference]: With dead ends: 27506 [2020-10-28 18:51:45,298 INFO L226 Difference]: Without dead ends: 15985 [2020-10-28 18:51:45,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2020-10-28 18:51:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 12083. [2020-10-28 18:51:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12083 states. [2020-10-28 18:51:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12083 states to 12083 states and 15803 transitions. [2020-10-28 18:51:46,387 INFO L78 Accepts]: Start accepts. Automaton has 12083 states and 15803 transitions. Word has length 69 [2020-10-28 18:51:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:46,388 INFO L481 AbstractCegarLoop]: Abstraction has 12083 states and 15803 transitions. [2020-10-28 18:51:46,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 12083 states and 15803 transitions. [2020-10-28 18:51:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:51:46,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:46,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:46,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:51:46,393 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash 98963580, now seen corresponding path program 1 times [2020-10-28 18:51:46,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:46,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443147270] [2020-10-28 18:51:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:46,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:48,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:48,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:51:48,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-10-28 18:51:48,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:48,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:51:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:48,931 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:48,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:48,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:48,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:48,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:48,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:48,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:51:48,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:48,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:48,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:48,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:48,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:48,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:48,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443147270] [2020-10-28 18:51:48,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:51:48,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:51:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187816042] [2020-10-28 18:51:48,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:48,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:48,993 INFO L87 Difference]: Start difference. First operand 12083 states and 15803 transitions. Second operand 8 states. [2020-10-28 18:51:49,211 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:51:50,204 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:51:50,808 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:51,766 INFO L93 Difference]: Finished difference Result 28372 states and 36977 transitions. [2020-10-28 18:51:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:51:51,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 18:51:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:51,794 INFO L225 Difference]: With dead ends: 28372 [2020-10-28 18:51:51,794 INFO L226 Difference]: Without dead ends: 16321 [2020-10-28 18:51:51,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:51:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16321 states. [2020-10-28 18:51:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16321 to 12633. [2020-10-28 18:51:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12633 states. [2020-10-28 18:51:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 16255 transitions. [2020-10-28 18:51:53,404 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 16255 transitions. Word has length 69 [2020-10-28 18:51:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:53,404 INFO L481 AbstractCegarLoop]: Abstraction has 12633 states and 16255 transitions. [2020-10-28 18:51:53,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 16255 transitions. [2020-10-28 18:51:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:51:53,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:53,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:53,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:51:53,410 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash -175448246, now seen corresponding path program 1 times [2020-10-28 18:51:53,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:53,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664167440] [2020-10-28 18:51:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:53,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:58,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:51:58,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:51:58,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 18:51:58,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:58,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 18:51:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:58,816 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:51:58,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:58,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:58,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:58,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:58,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:51:58,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:58,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:58,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:58,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664167440] [2020-10-28 18:51:58,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:51:58,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:51:58,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906999537] [2020-10-28 18:51:58,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:58,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:58,897 INFO L87 Difference]: Start difference. First operand 12633 states and 16255 transitions. Second operand 8 states. [2020-10-28 18:51:59,080 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:52:00,117 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:52:00,448 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:52:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:02,533 INFO L93 Difference]: Finished difference Result 37290 states and 47732 transitions. [2020-10-28 18:52:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:52:02,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 18:52:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:02,580 INFO L225 Difference]: With dead ends: 37290 [2020-10-28 18:52:02,580 INFO L226 Difference]: Without dead ends: 24718 [2020-10-28 18:52:02,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:52:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24718 states. [2020-10-28 18:52:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24718 to 15320. [2020-10-28 18:52:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15320 states. [2020-10-28 18:52:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15320 states to 15320 states and 19435 transitions. [2020-10-28 18:52:04,470 INFO L78 Accepts]: Start accepts. Automaton has 15320 states and 19435 transitions. Word has length 69 [2020-10-28 18:52:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:04,471 INFO L481 AbstractCegarLoop]: Abstraction has 15320 states and 19435 transitions. [2020-10-28 18:52:04,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:52:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 15320 states and 19435 transitions. [2020-10-28 18:52:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:52:04,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:04,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:04,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:52:04,475 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash 618896690, now seen corresponding path program 1 times [2020-10-28 18:52:04,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:04,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411279459] [2020-10-28 18:52:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:04,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:05,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:52:05,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:05,577 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:52:05,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:05,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:05,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411279459] [2020-10-28 18:52:05,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:05,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:52:05,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950800539] [2020-10-28 18:52:05,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:52:05,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:52:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:52:05,608 INFO L87 Difference]: Start difference. First operand 15320 states and 19435 transitions. Second operand 4 states. [2020-10-28 18:52:05,827 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:52:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:07,660 INFO L93 Difference]: Finished difference Result 20968 states and 26581 transitions. [2020-10-28 18:52:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:52:07,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:52:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:07,678 INFO L225 Difference]: With dead ends: 20968 [2020-10-28 18:52:07,678 INFO L226 Difference]: Without dead ends: 15261 [2020-10-28 18:52:07,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:52:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15261 states. [2020-10-28 18:52:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15261 to 15202. [2020-10-28 18:52:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15202 states. [2020-10-28 18:52:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15202 states to 15202 states and 19137 transitions. [2020-10-28 18:52:09,492 INFO L78 Accepts]: Start accepts. Automaton has 15202 states and 19137 transitions. Word has length 69 [2020-10-28 18:52:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:09,492 INFO L481 AbstractCegarLoop]: Abstraction has 15202 states and 19137 transitions. [2020-10-28 18:52:09,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:52:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 15202 states and 19137 transitions. [2020-10-28 18:52:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:52:09,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:09,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:09,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:52:09,496 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1929293526, now seen corresponding path program 1 times [2020-10-28 18:52:09,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:09,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317509690] [2020-10-28 18:52:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:09,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:09,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:09,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:11,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:13,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:52:13,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:52:13,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3743 [2020-10-28 18:52:13,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:13,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:13,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:52:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:52:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:13,463 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:52:13,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:13,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:13,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:13,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:52:13,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:13,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:52:13,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317509690] [2020-10-28 18:52:13,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:52:13,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:52:13,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869651271] [2020-10-28 18:52:13,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:13,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:13,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:13,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:13,499 INFO L87 Difference]: Start difference. First operand 15202 states and 19137 transitions. Second operand 6 states. [2020-10-28 18:52:13,694 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:52:14,495 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:52:15,941 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:52:16,144 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:52:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:17,202 INFO L93 Difference]: Finished difference Result 31558 states and 40342 transitions. [2020-10-28 18:52:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:52:17,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 18:52:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:17,259 INFO L225 Difference]: With dead ends: 31558 [2020-10-28 18:52:17,259 INFO L226 Difference]: Without dead ends: 25857 [2020-10-28 18:52:17,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25857 states. [2020-10-28 18:52:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25857 to 21561. [2020-10-28 18:52:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21561 states. [2020-10-28 18:52:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21561 states to 21561 states and 27035 transitions. [2020-10-28 18:52:19,746 INFO L78 Accepts]: Start accepts. Automaton has 21561 states and 27035 transitions. Word has length 71 [2020-10-28 18:52:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:19,746 INFO L481 AbstractCegarLoop]: Abstraction has 21561 states and 27035 transitions. [2020-10-28 18:52:19,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 21561 states and 27035 transitions. [2020-10-28 18:52:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:52:19,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:19,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:19,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:52:19,750 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1409360416, now seen corresponding path program 1 times [2020-10-28 18:52:19,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:19,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891246299] [2020-10-28 18:52:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:24,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:52:24,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:52:24,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:52:24,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:24,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:52:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:52:24,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:24,974 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:52:24,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:24,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:24,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:24,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:52:24,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:24,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 18:52:25,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891246299] [2020-10-28 18:52:25,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:52:25,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:52:25,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722612796] [2020-10-28 18:52:25,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:25,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:25,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:25,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:25,011 INFO L87 Difference]: Start difference. First operand 21561 states and 27035 transitions. Second operand 6 states. [2020-10-28 18:52:25,222 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:52:26,003 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:52:27,543 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:52:27,847 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:52:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:29,081 INFO L93 Difference]: Finished difference Result 34408 states and 43558 transitions. [2020-10-28 18:52:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:52:29,083 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 18:52:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:29,116 INFO L225 Difference]: With dead ends: 34408 [2020-10-28 18:52:29,116 INFO L226 Difference]: Without dead ends: 28961 [2020-10-28 18:52:29,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28961 states. [2020-10-28 18:52:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28961 to 22618. [2020-10-28 18:52:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22618 states. [2020-10-28 18:52:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22618 states to 22618 states and 28356 transitions. [2020-10-28 18:52:31,988 INFO L78 Accepts]: Start accepts. Automaton has 22618 states and 28356 transitions. Word has length 71 [2020-10-28 18:52:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:31,988 INFO L481 AbstractCegarLoop]: Abstraction has 22618 states and 28356 transitions. [2020-10-28 18:52:31,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 22618 states and 28356 transitions. [2020-10-28 18:52:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:52:31,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:31,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:31,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:52:31,992 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1898703489, now seen corresponding path program 1 times [2020-10-28 18:52:31,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:31,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185853627] [2020-10-28 18:52:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:32,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:37,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:37,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:52:37,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:52:37,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:52:37,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:37,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:52:37,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:37,217 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:52:37,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:37,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:37,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:52:37,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185853627] [2020-10-28 18:52:37,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:37,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:52:37,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591511046] [2020-10-28 18:52:37,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:37,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:37,257 INFO L87 Difference]: Start difference. First operand 22618 states and 28356 transitions. Second operand 6 states. [2020-10-28 18:52:37,473 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:52:38,306 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:52:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:42,071 INFO L93 Difference]: Finished difference Result 60224 states and 76036 transitions. [2020-10-28 18:52:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:52:42,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 18:52:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:42,115 INFO L225 Difference]: With dead ends: 60224 [2020-10-28 18:52:42,116 INFO L226 Difference]: Without dead ends: 37895 [2020-10-28 18:52:42,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:52:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37895 states. [2020-10-28 18:52:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37895 to 37836. [2020-10-28 18:52:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37836 states. [2020-10-28 18:52:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 47511 transitions. [2020-10-28 18:52:46,686 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 47511 transitions. Word has length 71 [2020-10-28 18:52:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:46,686 INFO L481 AbstractCegarLoop]: Abstraction has 37836 states and 47511 transitions. [2020-10-28 18:52:46,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 47511 transitions. [2020-10-28 18:52:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:52:46,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:46,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:52:46,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:52:46,690 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:46,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:46,691 INFO L82 PathProgramCache]: Analyzing trace with hash 831158076, now seen corresponding path program 1 times [2020-10-28 18:52:46,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:46,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132209082] [2020-10-28 18:52:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:46,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:48,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:48,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:51,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:51,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:52:51,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:52:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:52:51,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:51,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:52:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:52:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:51,909 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:52:51,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:51,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:51,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:52:51,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132209082] [2020-10-28 18:52:51,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:52:51,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:52:51,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241943349] [2020-10-28 18:52:51,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:51,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:51,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:51,937 INFO L87 Difference]: Start difference. First operand 37836 states and 47511 transitions. Second operand 6 states. [2020-10-28 18:52:52,147 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:52:53,042 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:52:55,036 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:52:55,239 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:52:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:58,339 INFO L93 Difference]: Finished difference Result 58331 states and 73939 transitions. [2020-10-28 18:52:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:52:58,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 18:52:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:58,389 INFO L225 Difference]: With dead ends: 58331 [2020-10-28 18:52:58,390 INFO L226 Difference]: Without dead ends: 48358 [2020-10-28 18:52:58,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48358 states. [2020-10-28 18:53:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48358 to 42552. [2020-10-28 18:53:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42552 states. [2020-10-28 18:53:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42552 states to 42552 states and 53535 transitions. [2020-10-28 18:53:03,419 INFO L78 Accepts]: Start accepts. Automaton has 42552 states and 53535 transitions. Word has length 71 [2020-10-28 18:53:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:03,419 INFO L481 AbstractCegarLoop]: Abstraction has 42552 states and 53535 transitions. [2020-10-28 18:53:03,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 42552 states and 53535 transitions. [2020-10-28 18:53:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:53:03,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:03,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:03,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:53:03,424 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1968955495, now seen corresponding path program 1 times [2020-10-28 18:53:03,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:03,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883934618] [2020-10-28 18:53:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:06,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:08,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 18:53:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:08,856 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:53:08,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:08,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:08,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:08,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:08,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883934618] [2020-10-28 18:53:08,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:53:08,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 18:53:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048745830] [2020-10-28 18:53:08,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:53:08,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:53:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:53:08,901 INFO L87 Difference]: Start difference. First operand 42552 states and 53535 transitions. Second operand 13 states. [2020-10-28 18:53:09,449 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 143 [2020-10-28 18:53:12,981 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:53:13,575 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 138 [2020-10-28 18:53:16,340 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:53:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:31,617 INFO L93 Difference]: Finished difference Result 160687 states and 201660 transitions. [2020-10-28 18:53:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-28 18:53:31,619 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-10-28 18:53:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:31,954 INFO L225 Difference]: With dead ends: 160687 [2020-10-28 18:53:31,954 INFO L226 Difference]: Without dead ends: 118316 [2020-10-28 18:53:31,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=983, Invalid=4129, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 18:53:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118316 states. [2020-10-28 18:53:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118316 to 72943. [2020-10-28 18:53:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72943 states. [2020-10-28 18:53:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72943 states to 72943 states and 92213 transitions. [2020-10-28 18:53:42,276 INFO L78 Accepts]: Start accepts. Automaton has 72943 states and 92213 transitions. Word has length 76 [2020-10-28 18:53:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:42,276 INFO L481 AbstractCegarLoop]: Abstraction has 72943 states and 92213 transitions. [2020-10-28 18:53:42,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:53:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 72943 states and 92213 transitions. [2020-10-28 18:53:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:53:42,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:42,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:42,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 18:53:42,282 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1951239715, now seen corresponding path program 1 times [2020-10-28 18:53:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:42,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493664143] [2020-10-28 18:53:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:44,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:45,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:45,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:45,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:45,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:46,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:46,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:47,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 18:53:47,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:47,707 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:53:47,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:47,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:47,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:47,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:47,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:53:47,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:47,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:47,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:47,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:47,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:47,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493664143] [2020-10-28 18:53:47,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:53:47,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 18:53:47,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213584542] [2020-10-28 18:53:47,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:53:47,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:47,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:53:47,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:53:47,747 INFO L87 Difference]: Start difference. First operand 72943 states and 92213 transitions. Second operand 13 states. [2020-10-28 18:53:48,285 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 140 [2020-10-28 18:53:51,012 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-28 18:53:51,789 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 143 [2020-10-28 18:53:52,524 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 144 [2020-10-28 18:53:52,774 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 18:53:55,932 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 138 [2020-10-28 18:53:57,089 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2020-10-28 18:54:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:20,844 INFO L93 Difference]: Finished difference Result 196772 states and 247045 transitions. [2020-10-28 18:54:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-28 18:54:20,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-10-28 18:54:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted.