/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:09,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:09,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:09,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:09,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:09,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:09,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:09,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:09,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:09,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:09,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:09,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:09,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:09,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:09,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:09,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:09,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:09,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:09,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:09,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:09,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:09,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:09,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:09,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:09,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:09,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:09,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:09,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:09,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:09,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:09,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:09,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:09,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:09,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:09,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:09,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:09,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:09,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:09,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:09,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:09,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:09,774 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 11:23:09,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:09,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:09,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:09,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:09,828 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:09,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:09,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:09,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:09,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:09,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:09,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:09,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:09,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:09,831 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:09,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:09,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:09,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:09,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:09,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:09,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:09,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:09,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:09,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:09,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:09,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:09,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:09,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:09,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:09,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:09,835 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:10,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:10,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:10,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:10,334 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:10,334 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:10,335 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-21 11:23:10,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf01a050e/5c612d001dc844fd85fb588b3fcff389/FLAGc1deb48cb [2020-09-21 11:23:11,051 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:11,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-21 11:23:11,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf01a050e/5c612d001dc844fd85fb588b3fcff389/FLAGc1deb48cb [2020-09-21 11:23:11,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf01a050e/5c612d001dc844fd85fb588b3fcff389 [2020-09-21 11:23:11,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:11,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:11,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:11,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:11,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:11,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:11" (1/1) ... [2020-09-21 11:23:11,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee39e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:11, skipping insertion in model container [2020-09-21 11:23:11,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:11" (1/1) ... [2020-09-21 11:23:11,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:11,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:11,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:11,873 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:11,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:12,001 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:12,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12 WrapperNode [2020-09-21 11:23:12,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:12,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:12,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:12,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:12,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:12,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:12,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:12,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:12,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (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 11:23:12,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:12,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 11:23:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 11:23:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-21 11:23:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-09-21 11:23:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-09-21 11:23:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-09-21 11:23:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-09-21 11:23:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-09-21 11:23:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-09-21 11:23:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-09-21 11:23:12,174 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-09-21 11:23:12,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 11:23:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 11:23:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 11:23:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 11:23:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 11:23:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 11:23:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 11:23:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 11:23:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 11:23:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 11:23:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 11:23:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 11:23:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 11:23:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 11:23:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 11:23:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 11:23:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 11:23:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 11:23:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 11:23:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 11:23:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 11:23:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 11:23:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 11:23:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 11:23:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 11:23:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 11:23:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 11:23:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 11:23:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 11:23:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 11:23:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 11:23:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 11:23:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 11:23:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 11:23:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 11:23:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 11:23:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 11:23:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 11:23:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 11:23:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 11:23:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 11:23:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 11:23:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 11:23:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 11:23:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 11:23:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 11:23:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 11:23:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 11:23:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 11:23:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 11:23:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 11:23:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 11:23:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:23:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:23:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 11:23:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:23:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 11:23:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 11:23:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 11:23:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 11:23:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:23:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 11:23:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 11:23:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 11:23:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 11:23:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 11:23:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 11:23:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 11:23:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 11:23:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 11:23:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 11:23:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 11:23:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 11:23:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 11:23:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 11:23:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 11:23:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 11:23:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 11:23:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 11:23:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 11:23:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 11:23:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 11:23:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 11:23:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 11:23:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 11:23:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 11:23:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 11:23:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 11:23:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 11:23:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 11:23:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 11:23:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 11:23:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 11:23:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 11:23:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 11:23:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 11:23:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 11:23:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 11:23:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 11:23:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 11:23:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 11:23:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 11:23:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:23:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-21 11:23:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-09-21 11:23:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:23:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:23:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-09-21 11:23:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:23:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-09-21 11:23:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:23:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-21 11:23:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-09-21 11:23:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-09-21 11:23:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-09-21 11:23:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-09-21 11:23:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-09-21 11:23:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:12,932 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:12,932 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-21 11:23:12,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:12 BoogieIcfgContainer [2020-09-21 11:23:12,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:12,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:12,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:12,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:12,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:11" (1/3) ... [2020-09-21 11:23:12,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf4f146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:12, skipping insertion in model container [2020-09-21 11:23:12,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12" (2/3) ... [2020-09-21 11:23:12,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf4f146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:12, skipping insertion in model container [2020-09-21 11:23:12,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:12" (3/3) ... [2020-09-21 11:23:12,948 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-09-21 11:23:12,960 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:12,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:12,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:13,026 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:13,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:13,027 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:13,027 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:13,027 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:13,027 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:13,028 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:13,028 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:13,055 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-09-21 11:23:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:13,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:13,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:13,066 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1243342133, now seen corresponding path program 1 times [2020-09-21 11:23:13,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:13,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960262521] [2020-09-21 11:23:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:13,282 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:13,282 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:13,283 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:13,283 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:13,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:23:13,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:13,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:23:13,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:13,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 11:23:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:13,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:13,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:13,366 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:13,366 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:13,366 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:13,366 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:13,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:13,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:13,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:13,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:13,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:13,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:13,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:13,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:13,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:13,404 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:13,404 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:13,404 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:13,405 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:13,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 11:23:13,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:13,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:13,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:23:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:13,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:13,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960262521] [2020-09-21 11:23:13,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:13,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:23:13,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239187843] [2020-09-21 11:23:13,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:23:13,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:13,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:23:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:23:13,452 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-09-21 11:23:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:13,812 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2020-09-21 11:23:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:23:13,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-09-21 11:23:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:13,831 INFO L225 Difference]: With dead ends: 234 [2020-09-21 11:23:13,831 INFO L226 Difference]: Without dead ends: 118 [2020-09-21 11:23:13,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 11:23:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-21 11:23:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2020-09-21 11:23:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 11:23:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-09-21 11:23:13,910 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 24 [2020-09-21 11:23:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:13,910 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-09-21 11:23:13,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:23:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-09-21 11:23:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 11:23:13,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:13,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:13,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:13,915 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2076611886, now seen corresponding path program 1 times [2020-09-21 11:23:13,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:13,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137072996] [2020-09-21 11:23:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,253 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:15,254 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,254 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,255 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:23:15,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-09-21 11:23:15,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:23:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:23:15,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:15,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,457 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,457 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,458 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,458 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:15,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:15,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,119 FATAL L256 erpolLogProxyWrapper]: Difference in size: 4 [2020-09-21 11:23:16,120 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -1 [2020-09-21 11:23:16,120 FATAL L256 erpolLogProxyWrapper]: Difference in width: 2 [2020-09-21 11:23:16,120 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 11:23:16,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-09-21 11:23:16,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:23:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 11:23:16,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:16,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:23:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,282 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,282 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,283 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,283 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:23:16,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:23:16,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:23:16,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:23:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,372 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,372 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,372 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,373 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:16,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:23:16,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:23:16,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 11:23:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,492 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,492 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,493 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,493 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:23:16,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 11:23:16,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:23:16,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:16,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:23:16,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:17,040 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-09-21 11:23:17,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:23:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,109 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,109 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:17,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:23:17,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137072996] [2020-09-21 11:23:17,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:17,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:23:17,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881353485] [2020-09-21 11:23:17,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:23:17,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:23:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:23:17,309 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 23 states. [2020-09-21 11:23:17,881 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-09-21 11:23:18,120 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-09-21 11:23:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:20,343 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2020-09-21 11:23:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:23:20,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-09-21 11:23:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:20,349 INFO L225 Difference]: With dead ends: 160 [2020-09-21 11:23:20,349 INFO L226 Difference]: Without dead ends: 157 [2020-09-21 11:23:20,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 11:23:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-21 11:23:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 120. [2020-09-21 11:23:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 11:23:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-09-21 11:23:20,373 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 49 [2020-09-21 11:23:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:20,374 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-09-21 11:23:20,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:23:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-09-21 11:23:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 11:23:20,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:20,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:20,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:20,377 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1536063324, now seen corresponding path program 1 times [2020-09-21 11:23:20,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:20,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324692973] [2020-09-21 11:23:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,107 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:21,107 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:21,107 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:21,108 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:23:21,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-09-21 11:23:21,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:23:21,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:21,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 11:23:21,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:21,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,224 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:21,224 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:21,224 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:21,224 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:21,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:21,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:21,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:21,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:21,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:21,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,574 FATAL L256 erpolLogProxyWrapper]: Difference in size: 4 [2020-09-21 11:23:21,574 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -1 [2020-09-21 11:23:21,575 FATAL L256 erpolLogProxyWrapper]: Difference in width: 2 [2020-09-21 11:23:21,575 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 11:23:21,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-09-21 11:23:21,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:23:21,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:21,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 11:23:21,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:21,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:23:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,828 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:21,828 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:21,829 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:21,829 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:23:21,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:23:21,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:23:21,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:21,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:23:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,922 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:21,922 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:21,922 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:21,922 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:21,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:23:21,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:21,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:21,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:23:21,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:21,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 11:23:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:22,033 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:22,034 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:22,034 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:22,034 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:22,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:23:22,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:22,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:23:22,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:23:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:23:22,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:22,577 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-09-21 11:23:22,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:23:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:22,619 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:22,619 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:22,620 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:22,620 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:22,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:22,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:23:22,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:23:22,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324692973] [2020-09-21 11:23:22,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:22,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:23:22,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526761263] [2020-09-21 11:23:22,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:23:22,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:23:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:23:22,789 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 24 states. [2020-09-21 11:23:23,719 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-09-21 11:23:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:26,119 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2020-09-21 11:23:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:23:26,120 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-09-21 11:23:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:26,124 INFO L225 Difference]: With dead ends: 163 [2020-09-21 11:23:26,125 INFO L226 Difference]: Without dead ends: 160 [2020-09-21 11:23:26,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 11:23:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-21 11:23:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-09-21 11:23:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 11:23:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-09-21 11:23:26,170 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 51 [2020-09-21 11:23:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:26,170 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-09-21 11:23:26,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:23:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-09-21 11:23:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:23:26,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:26,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:26,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:26,174 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:26,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1614179064, now seen corresponding path program 1 times [2020-09-21 11:23:26,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:26,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207585941] [2020-09-21 11:23:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:23:26,229 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:23:26,229 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:23:26,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:26,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:26 BoogieIcfgContainer [2020-09-21 11:23:26,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:26,270 INFO L168 Benchmark]: Toolchain (without parser) took 14979.41 ms. Allocated memory was 147.3 MB in the beginning and 348.1 MB in the end (delta: 200.8 MB). Free memory was 101.6 MB in the beginning and 217.0 MB in the end (delta: -115.4 MB). Peak memory consumption was 85.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:26,272 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:23:26,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.86 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 100.9 MB in the beginning and 169.2 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:26,276 INFO L168 Benchmark]: Boogie Preprocessor took 87.53 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 165.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:26,277 INFO L168 Benchmark]: RCFGBuilder took 846.71 ms. Allocated memory is still 204.5 MB. Free memory was 165.3 MB in the beginning and 101.6 MB in the end (delta: 63.7 MB). Peak memory consumption was 63.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:26,284 INFO L168 Benchmark]: TraceAbstraction took 13327.95 ms. Allocated memory was 204.5 MB in the beginning and 348.1 MB in the end (delta: 143.7 MB). Free memory was 100.9 MB in the beginning and 217.0 MB in the end (delta: -116.1 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:26,296 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 707.86 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 100.9 MB in the beginning and 169.2 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.53 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 165.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 846.71 ms. Allocated memory is still 204.5 MB. Free memory was 165.3 MB in the beginning and 101.6 MB in the end (delta: 63.7 MB). Peak memory consumption was 63.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13327.95 ms. Allocated memory was 204.5 MB in the beginning and 348.1 MB in the end (delta: 143.7 MB). Free memory was 100.9 MB in the beginning and 217.0 MB in the end (delta: -116.1 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L628] const struct node *p1, *p2; [L629] CALL, EXPR create_sll(&p1, &p2) [L577] struct node *list = ((void *)0); [L579] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L579] RET chain_node(&list) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L581] EXPR \read(*list) [L581] *pp2 = list [L582] COND FALSE !(__VERIFIER_nondet_int()) [L584] EXPR \read(*list) [L584] *pp1 = list [L586] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L586] RET chain_node(&list) [L587] COND FALSE !(__VERIFIER_nondet_int()) [L588] EXPR \read(*list) [L588] return list; [L577] struct node *list = ((void *)0); [L588] return list; [L629] RET, EXPR create_sll(&p1, &p2) [L629] struct node *list = create_sll(&p1, &p2); [L631] EXPR \read(*p1) [L631] EXPR \read(*p2) [L631] CALL check_seq_next(p1, p2) [L615] COND FALSE !(!(beg)) [L616] COND FALSE !(!(end)) [L617] EXPR beg->next [L617] beg = beg->next [L617] COND TRUE end != beg [L618] COND TRUE !(beg) [L618] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 322 SDtfs, 533 SDslu, 1505 SDs, 0 SdLazy, 3466 SolverSat, 309 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=2, 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, 3 MinimizatonAttempts, 87 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 223930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 12/20 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...