/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:25:54,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:54,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:54,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:54,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:54,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:54,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:54,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:54,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:54,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:54,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:54,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:54,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:54,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:54,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:54,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:54,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:54,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:54,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:54,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:54,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:54,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:54,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:54,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:54,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:54,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:54,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:54,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:54,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:54,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:54,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:54,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:54,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:54,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:54,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:54,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:54,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:54,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:54,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:54,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:54,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:54,611 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 [2020-09-21 12:25:54,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:54,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:54,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:54,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:54,643 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:54,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:54,643 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:54,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:54,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:54,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:54,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:54,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:54,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:54,645 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:54,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:54,645 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:54,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:54,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:54,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:54,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:54,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:54,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:54,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:54,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:54,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:54,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:54,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:54,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:54,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:54,648 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.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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:55,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:55,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:55,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:55,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:55,129 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:55,131 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-09-21 12:25:55,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a28683bcf/866048352f6440ad8637da84428fec54/FLAGf55658e4d [2020-09-21 12:25:55,863 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:55,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_search-1.i [2020-09-21 12:25:55,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a28683bcf/866048352f6440ad8637da84428fec54/FLAGf55658e4d [2020-09-21 12:25:56,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a28683bcf/866048352f6440ad8637da84428fec54 [2020-09-21 12:25:56,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:56,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:56,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:56,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:56,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:56,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1aa6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56, skipping insertion in model container [2020-09-21 12:25:56,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:56,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:56,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:56,696 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:56,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:56,847 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:56,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56 WrapperNode [2020-09-21 12:25:56,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:56,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:56,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:56,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:56,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:56,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:56,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:56,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:56,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (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 [2020-09-21 12:25:57,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:57,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:57,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:25:57,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 12:25:57,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 12:25:57,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-21 12:25:57,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-21 12:25:57,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-21 12:25:57,011 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-09-21 12:25:57,011 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-09-21 12:25:57,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:25:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:25:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:25:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:25:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:25:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:25:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:25:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:25:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:25:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:25:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:25:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:25:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:25:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:25:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:25:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:25:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:25:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 12:25:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 12:25:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-21 12:25:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-21 12:25:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-21 12:25:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:25:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:25:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:25:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:25:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:25:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:25:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:25:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:25:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:25:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:25:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:25:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:25:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:25:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:25:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:25:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:25:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:25:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:25:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:25:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:25:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:25:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:25:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:25:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:25:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:25:57,021 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:25:57,021 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:25:57,021 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:25:57,021 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:25:57,021 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:25:57,021 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:25:57,021 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:25:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:25:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:25:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:25:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:25:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:25:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:25:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:25:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:25:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:25:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 12:25:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:25:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:25:57,024 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 12:25:57,024 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:25:57,024 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:25:57,024 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 12:25:57,024 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:25:57,024 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:25:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:25:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:25:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:25:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:25:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:25:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:25:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:25:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:25:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:25:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:25:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:25:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:25:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:25:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:25:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:25:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:25:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:25:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:25:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:25:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:25:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:25:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:25:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:25:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:25:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:25:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:25:57,029 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:25:57,029 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:25:57,029 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:25:57,029 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:25:57,029 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:25:57,029 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:25:57,030 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:25:57,030 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:25:57,030 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:25:57,030 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:25:57,030 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-09-21 12:25:57,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:25:57,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:25:57,031 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-09-21 12:25:57,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:25:57,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:25:57,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:25:57,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:57,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:25:57,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:57,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:57,633 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:57,633 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 12:25:57,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:57 BoogieIcfgContainer [2020-09-21 12:25:57,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:57,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:57,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:57,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:57,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:56" (1/3) ... [2020-09-21 12:25:57,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f0d3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:57, skipping insertion in model container [2020-09-21 12:25:57,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (2/3) ... [2020-09-21 12:25:57,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f0d3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:57, skipping insertion in model container [2020-09-21 12:25:57,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:57" (3/3) ... [2020-09-21 12:25:57,648 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-09-21 12:25:57,660 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:57,671 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:57,694 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:57,723 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:57,723 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:57,723 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:57,723 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:57,723 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:57,723 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:57,724 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:57,724 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-09-21 12:25:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 12:25:57,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:57,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:57,759 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-09-21 12:25:57,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:57,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143952430] [2020-09-21 12:25:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 12:25:59,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:25:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-09-21 12:25:59,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-21 12:25:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:25:59,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:59,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:25:59,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:25:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:25:59,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 12:25:59,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:25:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:25:59,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 12:25:59,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:25:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:25:59,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 12:25:59,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:25:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:25:59,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 12:25:59,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:25:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:25:59,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:25:59,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:25:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-21 12:25:59,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143952430] [2020-09-21 12:25:59,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:59,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:25:59,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245953408] [2020-09-21 12:25:59,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:25:59,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:25:59,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:59,455 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-09-21 12:25:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:59,649 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-09-21 12:25:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:59,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-09-21 12:25:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:59,665 INFO L225 Difference]: With dead ends: 58 [2020-09-21 12:25:59,666 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 12:25:59,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:25:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 12:25:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 12:25:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:25:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-09-21 12:25:59,732 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 45 [2020-09-21 12:25:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:59,735 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-09-21 12:25:59,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:25:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-09-21 12:25:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 12:25:59,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:59,739 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:59,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:59,740 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1842115760, now seen corresponding path program 1 times [2020-09-21 12:25:59,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:59,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909181656] [2020-09-21 12:25:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 12:26:00,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:26:00,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:26:00,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:00,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:26:00,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:26:00,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:00,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:00,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:00,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:00,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:00,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:00,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:00,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:00,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:00,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:00,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:26:00,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:00,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:00,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:00,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:00,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:00,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:26:00,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:00,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:00,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:00,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:00,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:01,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:01,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:01,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:01,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-21 12:26:01,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:01,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:26:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:26:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:01,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:01,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:01,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:01,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:01,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:01,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 12:26:01,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:01,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:26:01,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:01,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:01,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:01,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:26:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:01,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:01,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:01,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:26:01,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:26:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:26:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:01,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-21 12:26:01,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909181656] [2020-09-21 12:26:01,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:01,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:26:01,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131512329] [2020-09-21 12:26:01,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:26:01,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:01,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:26:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:26:01,232 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2020-09-21 12:26:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:01,672 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2020-09-21 12:26:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:01,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-09-21 12:26:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:01,674 INFO L225 Difference]: With dead ends: 73 [2020-09-21 12:26:01,675 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 12:26:01,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 12:26:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-21 12:26:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 12:26:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-21 12:26:01,690 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 47 [2020-09-21 12:26:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:01,690 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-21 12:26:01,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:26:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-21 12:26:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 12:26:01,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:01,695 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-09-21 12:26:01,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:26:01,695 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:01,696 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-09-21 12:26:01,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:01,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282457731] [2020-09-21 12:26:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:01,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 12:26:02,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-09-21 12:26:02,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:26:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-21 12:26:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:26:02,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:02,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:02,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:02,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:02,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:02,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:02,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:26:02,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:02,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:02,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:02,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 12:26:02,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:02,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:02,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 12:26:02,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:02,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:02,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:02,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-21 12:26:02,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:02,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:02,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:26:02,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:26:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:03,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:03,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:26:03,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:03,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 12:26:03,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:03,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:03,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:26:03,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:26:03,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:26:03,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282457731] [2020-09-21 12:26:03,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:03,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 12:26:03,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521578327] [2020-09-21 12:26:03,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:26:03,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:03,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:26:03,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:26:03,137 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 11 states. [2020-09-21 12:26:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:03,705 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-09-21 12:26:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:26:03,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-09-21 12:26:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:03,709 INFO L225 Difference]: With dead ends: 55 [2020-09-21 12:26:03,709 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 12:26:03,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:26:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 12:26:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-09-21 12:26:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:26:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-09-21 12:26:03,720 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-09-21 12:26:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:03,720 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-09-21 12:26:03,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:26:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-09-21 12:26:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 12:26:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:03,722 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-09-21 12:26:03,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:26:03,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-09-21 12:26:03,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:03,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059859011] [2020-09-21 12:26:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:03,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:04,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:04,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 12:26:04,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:04,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-09-21 12:26:04,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-21 12:26:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:26:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:04,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:04,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:04,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:04,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:04,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:04,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:04,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:04,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:04,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:04,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:04,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 12:26:04,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:04,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:04,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:04,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:04,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:04,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:04,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 12:26:04,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:04,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:04,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:04,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:04,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:04,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:04,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:04,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:04,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:04,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 12:26:04,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:04,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:04,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:04,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:04,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:04,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:05,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:05,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:05,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:05,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-21 12:26:05,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:05,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:26:05,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:05,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:26:05,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:05,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:26:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:05,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:05,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:05,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:26:05,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:05,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-21 12:26:05,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:05,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:26:05,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:26:05,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:26:05,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:26:05,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059859011] [2020-09-21 12:26:05,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:05,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 12:26:05,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276256149] [2020-09-21 12:26:05,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:26:05,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:05,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:26:05,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:26:05,179 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-09-21 12:26:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:05,688 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 12:26:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:26:05,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-09-21 12:26:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:05,692 INFO L225 Difference]: With dead ends: 54 [2020-09-21 12:26:05,692 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:26:05,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:26:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:26:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-21 12:26:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:26:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-09-21 12:26:05,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-09-21 12:26:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:05,751 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-09-21 12:26:05,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:26:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-09-21 12:26:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 12:26:05,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:05,753 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2020-09-21 12:26:05,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:26:05,754 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-09-21 12:26:05,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:05,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830539638] [2020-09-21 12:26:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:05,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:06,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:06,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 12:26:06,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:06,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-09-21 12:26:06,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 12:26:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-21 12:26:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 12:26:06,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:06,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:06,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:06,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:06,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:06,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:06,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:06,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:06,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:06,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:06,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:06,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:06,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:06,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:06,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:26:06,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:06,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:06,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:06,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:06,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:07,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:07,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:07,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:07,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:26:07,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:07,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:07,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:07,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:07,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:07,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:07,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:07,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:07,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:07,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 12:26:07,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:26:07,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:07,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:07,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:07,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:07,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-21 12:26:07,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:07,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:26:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:07,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 12:26:07,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:07,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-09-21 12:26:07,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:07,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:26:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:26:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:26:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-21 12:26:08,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830539638] [2020-09-21 12:26:08,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:08,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 12:26:08,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855870233] [2020-09-21 12:26:08,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 12:26:08,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 12:26:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-09-21 12:26:08,066 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 20 states. [2020-09-21 12:26:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:09,397 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-09-21 12:26:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 12:26:09,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-09-21 12:26:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:09,400 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:26:09,400 INFO L226 Difference]: Without dead ends: 50 [2020-09-21 12:26:09,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2020-09-21 12:26:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-21 12:26:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-09-21 12:26:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:26:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-09-21 12:26:09,416 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-09-21 12:26:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:09,417 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-09-21 12:26:09,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 12:26:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-09-21 12:26:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 12:26:09,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:09,424 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2020-09-21 12:26:09,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:26:09,424 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-09-21 12:26:09,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:09,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235852239] [2020-09-21 12:26:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:09,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:09,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:10,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 12:26:10,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:26:10,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-21 12:26:10,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:26:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-21 12:26:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:26:10,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:10,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:10,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:10,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:10,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:10,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:10,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:10,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:10,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:10,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:10,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:10,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:10,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:26:10,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:10,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:10,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:10,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:10,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:10,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:10,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 12:26:10,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:10,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:10,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:10,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:10,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:10,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:10,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:10,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:10,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:10,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:26:10,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:10,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:10,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:10,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:10,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:10,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:10,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:10,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:10,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:10,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-21 12:26:10,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:26:10,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:10,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:26:10,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:10,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:26:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:10,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:10,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 12:26:10,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:10,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-21 12:26:10,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:10,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:10,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:26:10,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:26:10,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-21 12:26:11,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235852239] [2020-09-21 12:26:11,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:11,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:26:11,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940114431] [2020-09-21 12:26:11,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:26:11,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:26:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:11,035 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-09-21 12:26:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:11,590 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-09-21 12:26:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:11,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-09-21 12:26:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:11,592 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:26:11,592 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 12:26:11,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:26:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 12:26:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-09-21 12:26:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 12:26:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-09-21 12:26:11,602 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 50 [2020-09-21 12:26:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:11,602 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-09-21 12:26:11,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:26:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-09-21 12:26:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 12:26:11,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:11,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2020-09-21 12:26:11,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:26:11,604 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-09-21 12:26:11,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:11,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93764031] [2020-09-21 12:26:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:11,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:12,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:12,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:26:12,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-09-21 12:26:12,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 12:26:12,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:26:12,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 12:26:12,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:12,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:12,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:12,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:12,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:12,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:12,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:12,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:12,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:12,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:12,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:12,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:12,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:12,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:12,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:26:12,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:12,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:12,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:12,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:12,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:12,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:12,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:12,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:12,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:12,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-21 12:26:12,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:26:12,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:13,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:13,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:13,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:13,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:13,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:13,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-09-21 12:26:13,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:13,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:13,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:13,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:13,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:13,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:13,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:13,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-21 12:26:13,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:13,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:13,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:13,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:26:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:13,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:13,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:13,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:26:13,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:13,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-21 12:26:13,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:13,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:13,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:26:13,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:26:13,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 12:26:14,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93764031] [2020-09-21 12:26:14,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:14,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 12:26:14,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458590563] [2020-09-21 12:26:14,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 12:26:14,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 12:26:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-09-21 12:26:14,199 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 21 states. [2020-09-21 12:26:14,927 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-09-21 12:26:15,111 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-09-21 12:26:15,782 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-09-21 12:26:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:16,754 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-09-21 12:26:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 12:26:16,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-09-21 12:26:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:16,758 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:26:16,759 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 12:26:16,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 12:26:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 12:26:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-09-21 12:26:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 12:26:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-09-21 12:26:16,770 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 53 [2020-09-21 12:26:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:16,770 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-09-21 12:26:16,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 12:26:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-09-21 12:26:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 12:26:16,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:16,771 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2020-09-21 12:26:16,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:26:16,772 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-09-21 12:26:16,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:16,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019847579] [2020-09-21 12:26:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:16,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:17,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:17,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:17,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:26:17,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:17,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:26:17,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 12:26:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:26:17,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 12:26:17,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:17,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:17,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:17,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:17,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:17,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:17,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:17,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:17,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:17,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:17,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:17,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:18,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:18,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:18,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:18,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:26:18,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:18,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:18,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:18,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:18,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:18,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:18,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:18,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:18,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:18,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:18,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:26:18,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:18,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:18,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:18,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 12:26:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:18,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:18,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:18,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:18,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-21 12:26:18,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:18,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:26:18,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:26:18,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:18,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:18,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:18,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:18,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:18,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:18,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-21 12:26:18,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:18,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:18,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:18,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:18,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:18,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:26:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:18,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:18,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:18,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:18,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:26:18,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:18,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-21 12:26:18,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:18,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:26:18,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:26:18,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:26:18,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-21 12:26:18,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019847579] [2020-09-21 12:26:18,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:18,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 12:26:18,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361064839] [2020-09-21 12:26:18,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 12:26:18,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:18,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 12:26:18,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:26:18,920 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 16 states. [2020-09-21 12:26:19,359 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-09-21 12:26:20,457 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-09-21 12:26:20,742 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-21 12:26:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:20,891 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-09-21 12:26:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 12:26:20,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-21 12:26:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:20,893 INFO L225 Difference]: With dead ends: 66 [2020-09-21 12:26:20,893 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 12:26:20,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2020-09-21 12:26:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 12:26:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-09-21 12:26:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 12:26:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-09-21 12:26:20,909 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-09-21 12:26:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:20,911 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-09-21 12:26:20,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 12:26:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-09-21 12:26:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 12:26:20,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:20,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-09-21 12:26:20,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:26:20,913 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-09-21 12:26:20,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:20,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799248603] [2020-09-21 12:26:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:26:20,980 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:26:20,981 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:26:20,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:26:21,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:26:21 BoogieIcfgContainer [2020-09-21 12:26:21,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:26:21,028 INFO L168 Benchmark]: Toolchain (without parser) took 24928.15 ms. Allocated memory was 138.4 MB in the beginning and 432.0 MB in the end (delta: 293.6 MB). Free memory was 100.7 MB in the beginning and 114.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 279.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:21,029 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:26:21,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 743.51 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 100.1 MB in the beginning and 168.0 MB in the end (delta: -67.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:21,031 INFO L168 Benchmark]: Boogie Preprocessor took 74.14 ms. Allocated memory is still 203.9 MB. Free memory was 168.0 MB in the beginning and 165.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:21,038 INFO L168 Benchmark]: RCFGBuilder took 714.95 ms. Allocated memory is still 203.9 MB. Free memory was 165.2 MB in the beginning and 120.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:21,039 INFO L168 Benchmark]: TraceAbstraction took 23384.78 ms. Allocated memory was 203.9 MB in the beginning and 432.0 MB in the end (delta: 228.1 MB). Free memory was 120.1 MB in the beginning and 114.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 233.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:21,053 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 743.51 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 100.1 MB in the beginning and 168.0 MB in the end (delta: -67.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.14 ms. Allocated memory is still 203.9 MB. Free memory was 168.0 MB in the beginning and 165.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 714.95 ms. Allocated memory is still 203.9 MB. Free memory was 165.2 MB in the beginning and 120.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23384.78 ms. Allocated memory was 203.9 MB in the beginning and 432.0 MB in the end (delta: 228.1 MB). Free memory was 120.1 MB in the beginning and 114.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 233.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; [L543] int i; [L544] mlist *mylist, *temp; [L545] CALL insert_list(mylist,2) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) [L539] head = l [L540] return 0; [L545] RET insert_list(mylist,2) [L546] CALL insert_list(mylist,5) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head [L539] head = l [L540] return 0; [L546] RET insert_list(mylist,5) [L547] CALL insert_list(mylist,1) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head [L539] head = l [L540] return 0; [L547] RET insert_list(mylist,1) [L548] CALL insert_list(mylist,3) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head [L539] head = l [L540] return 0; [L548] RET insert_list(mylist,3) [L549] CALL, EXPR search_list(head,2) [L524] l = head [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; [L549] RET, EXPR search_list(head,2) [L549] temp = search_list(head,2) [L550] EXPR temp->key [L550] CALL __VERIFIER_assert(temp->key==1) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.2s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 229 SDtfs, 535 SDslu, 633 SDs, 0 SdLazy, 2185 SolverSat, 290 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 41 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 448 NumberOfCodeBlocks, 448 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 223810 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 216/264 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...