/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/dll2c_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:36:01,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:36:01,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:36:01,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:36:01,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:36:01,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:36:01,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:36:01,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:36:01,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:36:01,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:36:01,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:36:01,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:36:01,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:36:01,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:36:01,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:36:01,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:36:01,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:36:01,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:36:01,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:36:01,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:36:01,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:36:01,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:36:01,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:36:01,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:36:01,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:36:01,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:36:01,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:36:01,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:36:01,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:36:01,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:36:01,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:36:01,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:36:01,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:36:01,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:36:01,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:36:01,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:36:01,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:36:01,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:36:01,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:36:01,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:36:01,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:36:01,797 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 [2020-10-13 10:36:01,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:36:01,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:36:01,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:36:01,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:36:01,839 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:36:01,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:36:01,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:36:01,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:36:01,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:36:01,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:36:01,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:36:01,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:36:01,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:36:01,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:36:01,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:36:01,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:36:01,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:36:01,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:36:01,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:36:01,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:36:01,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:36:01,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:36:01,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:36:01,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:36:01,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:36:01,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:36:01,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:36:01,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:36:01,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:36:01,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:36:02,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:36:02,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:36:02,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:36:02,216 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:36:02,216 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:36:02,217 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_prepend_equal.i [2020-10-13 10:36:02,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad5093046/a2c7ec0dc35c4714a443c07023e7fc41/FLAG171d4eaff [2020-10-13 10:36:02,769 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:36:02,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2c_prepend_equal.i [2020-10-13 10:36:02,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad5093046/a2c7ec0dc35c4714a443c07023e7fc41/FLAG171d4eaff [2020-10-13 10:36:03,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad5093046/a2c7ec0dc35c4714a443c07023e7fc41 [2020-10-13 10:36:03,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:36:03,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:36:03,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:36:03,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:36:03,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:36:03,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e09312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03, skipping insertion in model container [2020-10-13 10:36:03,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:36:03,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:36:03,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:36:03,664 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:36:03,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:36:03,787 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:36:03,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03 WrapperNode [2020-10-13 10:36:03,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:36:03,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:36:03,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:36:03,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:36:03,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (1/1) ... [2020-10-13 10:36:03,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:36:03,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:36:03,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:36:03,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:36:03,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (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 [2020-10-13 10:36:03,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:36:03,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:36:03,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:36:03,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:36:03,929 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:36:03,930 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-13 10:36:03,930 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2020-10-13 10:36:03,930 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2020-10-13 10:36:03,930 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_prepend [2020-10-13 10:36:03,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:36:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:36:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:36:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:36:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:36:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:36:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:36:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:36:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:36:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:36:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:36:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:36:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:36:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:36:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:36:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:36:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:36:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:36:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:36:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:36:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:36:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:36:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:36:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:36:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:36:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:36:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:36:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:36:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:36:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:36:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:36:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:36:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:36:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:36:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:36:03,935 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:36:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:36:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:36:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:36:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:36:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:36:03,936 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:36:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:36:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:36:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:36:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:36:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:36:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:36:03,937 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:36:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:36:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:36:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:36:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:36:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:36:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:36:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:36:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:36:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:36:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:36:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:36:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:36:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:36:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:36:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:36:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:36:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:36:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:36:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:36:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:36:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:36:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:36:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:36:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:36:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:36:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:36:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:36:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:36:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:36:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:36:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:36:03,944 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:36:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:36:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:36:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:36:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-13 10:36:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:36:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:36:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:36:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2020-10-13 10:36:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2020-10-13 10:36:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:36:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:36:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_prepend [2020-10-13 10:36:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:36:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:36:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-13 10:36:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:36:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:36:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:36:04,450 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:36:04,620 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:36:04,621 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 10:36:04,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:36:04 BoogieIcfgContainer [2020-10-13 10:36:04,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:36:04,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:36:04,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:36:04,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:36:04,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:36:03" (1/3) ... [2020-10-13 10:36:04,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed31b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:36:04, skipping insertion in model container [2020-10-13 10:36:04,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:03" (2/3) ... [2020-10-13 10:36:04,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed31b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:36:04, skipping insertion in model container [2020-10-13 10:36:04,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:36:04" (3/3) ... [2020-10-13 10:36:04,633 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2020-10-13 10:36:04,644 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:36:04,651 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:36:04,666 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:36:04,690 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:36:04,691 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:36:04,691 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:36:04,691 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:36:04,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:36:04,691 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:36:04,692 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:36:04,692 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:36:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-13 10:36:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:36:04,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:04,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:04,721 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash -301799002, now seen corresponding path program 1 times [2020-10-13 10:36:04,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:04,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205925726] [2020-10-13 10:36:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:05,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:36:05,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:05,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-13 10:36:05,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:36:05,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:05,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:36:05,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:05,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:05,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:36:05,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:05,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:05,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:36:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:05,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:36:05,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:05,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:36:05,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:05,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:36:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:05,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:05,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:36:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:05,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:05,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:05,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:05,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:36:05,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:05,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 10:36:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:05,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:05,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:36:05,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:05,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 10:36:05,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:05,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:05,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:36:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:05,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:05,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:36:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:05,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:05,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:05,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:36:05,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:36:05,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205925726] [2020-10-13 10:36:05,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:36:05,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:36:05,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876950666] [2020-10-13 10:36:05,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:36:05,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:36:05,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:36:05,635 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-13 10:36:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:05,877 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2020-10-13 10:36:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:36:05,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-13 10:36:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:05,890 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:36:05,891 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:36:05,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:36:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:36:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:36:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:36:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-13 10:36:05,943 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-13 10:36:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:05,946 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-13 10:36:05,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:36:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-13 10:36:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:36:05,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:05,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:05,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:36:05,950 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1245592506, now seen corresponding path program 1 times [2020-10-13 10:36:05,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:05,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526519479] [2020-10-13 10:36:05,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:05,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:07,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:10,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:10,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:36:10,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:10,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4892 [2020-10-13 10:36:10,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:36:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:36:10,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:10,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:10,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:10,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:10,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:10,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:36:10,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:10,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:10,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:36:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:10,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:10,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:10,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:36:11,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:11,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 10:36:11,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:36:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:36:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:36:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:36:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:11,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:11,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:11,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:11,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:36:11,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:11,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:36:11,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:11,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:36:11,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:11,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 10:36:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:11,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:11,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:11,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:36:11,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:11,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 10:36:11,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:11,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:11,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:36:11,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:11,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:11,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:36:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:11,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:11,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:11,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:11,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:36:11,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:11,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:36:11,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526519479] [2020-10-13 10:36:11,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:36:11,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:36:11,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098831294] [2020-10-13 10:36:11,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:36:11,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:36:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:36:11,175 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2020-10-13 10:36:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:11,444 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-13 10:36:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:36:11,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-13 10:36:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:11,446 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:36:11,446 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:36:11,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:36:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:36:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-13 10:36:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:36:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-13 10:36:11,459 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 36 [2020-10-13 10:36:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:11,459 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-13 10:36:11,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:36:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-13 10:36:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:36:11,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:11,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:11,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:36:11,462 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:11,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2128308850, now seen corresponding path program 1 times [2020-10-13 10:36:11,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:11,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552401090] [2020-10-13 10:36:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:15,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:15,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:36:15,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:15,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3589 [2020-10-13 10:36:15,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:36:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:36:15,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:15,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:15,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:15,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:15,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:15,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:36:15,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:15,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:36:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:15,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:15,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:15,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:36:15,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:15,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-13 10:36:15,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:15,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:36:15,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:15,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:36:15,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:36:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:15,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:15,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:15,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:15,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:15,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:36:15,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:15,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:36:15,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:15,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:36:15,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:36:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:15,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:15,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:15,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:15,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:15,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:36:15,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:36:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:36:15,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:15,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 10:36:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:16,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:16,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:36:16,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-13 10:36:16,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:36:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:36:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:36:16,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:16,832 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-13 10:36:17,234 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-10-13 10:36:17,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:36:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:17,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:17,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:17,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:17,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:17,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-13 10:36:17,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:17,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:36:17,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:36:17,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:36:17,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:36:17,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552401090] [2020-10-13 10:36:17,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:17,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:36:17,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386388695] [2020-10-13 10:36:17,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:36:17,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:17,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:36:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:36:17,647 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 26 states. [2020-10-13 10:36:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:19,143 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-13 10:36:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:36:19,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-10-13 10:36:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:19,148 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:36:19,148 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:36:19,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:36:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:36:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 10:36:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:36:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-13 10:36:19,167 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 46 [2020-10-13 10:36:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:19,168 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-13 10:36:19,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:36:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-13 10:36:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:36:19,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:19,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:19,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:36:19,173 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2140293592, now seen corresponding path program 1 times [2020-10-13 10:36:19,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:19,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456933364] [2020-10-13 10:36:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:19,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:21,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:24,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:24,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:36:24,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:24,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-13 10:36:24,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:36:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:24,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:36:24,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:24,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:24,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:24,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:24,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:24,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:24,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:24,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:36:24,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:36:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:24,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:25,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:25,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:36:25,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:25,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-13 10:36:25,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:36:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:36:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:25,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:36:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:25,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:25,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:25,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:25,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:25,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:36:25,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:36:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:36:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:25,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:36:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:25,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:25,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:25,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:36:25,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:25,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-13 10:36:25,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:36:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:36:25,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:36:25,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:25,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 10:36:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:25,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:26,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:26,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:36:26,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:26,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-13 10:36:26,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:26,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:36:26,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:36:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:36:26,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1