/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/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:11,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:11,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:11,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:11,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:11,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:11,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:11,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:11,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:11,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:11,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:11,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:11,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:11,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:11,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:11,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:11,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:11,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:11,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:11,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:11,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:11,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:11,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:11,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:11,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:11,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:11,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:11,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:11,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:11,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:11,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:11,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:11,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:11,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:11,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:11,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:11,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:11,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:11,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:11,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:11,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:11,123 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 11:23:11,151 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:11,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:11,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:11,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:11,153 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:11,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:11,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:11,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:11,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:11,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:11,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:11,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:11,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:11,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:11,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:11,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:11,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:11,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:11,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:11,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:11,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:11,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:11,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:11,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:11,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:11,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:11,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:11,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:11,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:11,158 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 11:23:11,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:11,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:11,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:11,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:11,764 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:11,765 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-09-21 11:23:11,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5c6b7f7a/e434116590494cada26e639cc129e06d/FLAG2fbcc0320 [2020-09-21 11:23:12,523 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:12,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_search-1.i [2020-09-21 11:23:12,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5c6b7f7a/e434116590494cada26e639cc129e06d/FLAG2fbcc0320 [2020-09-21 11:23:12,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5c6b7f7a/e434116590494cada26e639cc129e06d [2020-09-21 11:23:12,783 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:12,791 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:12,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:12,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:12,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:12,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfafcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12, skipping insertion in model container [2020-09-21 11:23:12,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:12,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:13,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:13,359 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:13,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:13,473 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:13,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13 WrapperNode [2020-09-21 11:23:13,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:13,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:13,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:13,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:13,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:13,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:13,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:13,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:13,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (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 11:23:13,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:13,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:13,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:23:13,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 11:23:13,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 11:23:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-21 11:23:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-21 11:23:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-21 11:23:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-09-21 11:23:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-09-21 11:23:13,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:13,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:13,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:23:13,632 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 11:23:13,632 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 11:23:13,633 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 11:23:13,633 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 11:23:13,633 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 11:23:13,633 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 11:23:13,633 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 11:23:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 11:23:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 11:23:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 11:23:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 11:23:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 11:23:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 11:23:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 11:23:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 11:23:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 11:23:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 11:23:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 11:23:13,636 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-21 11:23:13,636 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-21 11:23:13,636 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-21 11:23:13,636 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 11:23:13,636 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 11:23:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 11:23:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 11:23:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 11:23:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 11:23:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 11:23:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 11:23:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 11:23:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 11:23:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 11:23:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 11:23:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 11:23:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 11:23:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 11:23:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 11:23:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 11:23:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 11:23:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 11:23:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 11:23:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 11:23:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 11:23:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 11:23:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 11:23:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 11:23:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 11:23:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 11:23:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 11:23:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 11:23:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 11:23:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 11:23:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 11:23:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 11:23:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 11:23:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:23:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:23:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 11:23:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:23:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 11:23:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 11:23:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 11:23:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 11:23:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:23:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 11:23:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 11:23:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 11:23:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 11:23:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 11:23:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 11:23:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 11:23:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 11:23:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 11:23:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 11:23:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 11:23:13,646 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 11:23:13,646 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 11:23:13,646 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 11:23:13,646 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 11:23:13,646 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 11:23:13,646 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 11:23:13,647 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 11:23:13,647 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 11:23:13,647 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 11:23:13,647 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 11:23:13,647 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 11:23:13,647 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 11:23:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 11:23:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 11:23:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 11:23:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 11:23:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 11:23:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 11:23:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 11:23:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 11:23:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 11:23:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 11:23:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 11:23:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 11:23:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 11:23:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 11:23:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 11:23:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 11:23:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 11:23:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 11:23:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 11:23:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 11:23:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-09-21 11:23:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:23:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:23:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-09-21 11:23:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:23:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:23:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:23:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:13,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:14,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:14,233 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 11:23:14,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:14 BoogieIcfgContainer [2020-09-21 11:23:14,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:14,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:14,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:14,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:14,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:12" (1/3) ... [2020-09-21 11:23:14,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e72888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:14, skipping insertion in model container [2020-09-21 11:23:14,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (2/3) ... [2020-09-21 11:23:14,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e72888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:14, skipping insertion in model container [2020-09-21 11:23:14,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:14" (3/3) ... [2020-09-21 11:23:14,250 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-09-21 11:23:14,262 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:14,273 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:14,295 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:14,323 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:14,323 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:14,324 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:14,324 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:14,324 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:14,324 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:14,324 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:14,324 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-09-21 11:23:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:23:14,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:14,355 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 11:23:14,355 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:14,362 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-09-21 11:23:14,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:14,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527988435] [2020-09-21 11:23:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,676 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,676 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,678 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,678 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 11:23:14,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-21 11:23:14,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:23:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:14,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,821 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,822 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,822 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,822 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:14,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:14,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:14,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:14,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,894 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,895 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,895 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:14,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:23:14,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:23:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:23:14,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,018 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,019 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,019 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,019 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:15,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:23:15,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:15,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:15,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:15,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:23:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,071 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,071 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,072 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,072 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:15,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:23:15,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,093 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,093 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:23:15,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:23:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,109 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,109 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,110 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:15,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:23:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-21 11:23:15,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527988435] [2020-09-21 11:23:15,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:15,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:23:15,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998120819] [2020-09-21 11:23:15,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:23:15,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:23:15,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:15,172 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 8 states. [2020-09-21 11:23:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,685 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-09-21 11:23:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:23:15,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-09-21 11:23:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,702 INFO L225 Difference]: With dead ends: 95 [2020-09-21 11:23:15,703 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:23:15,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:23:15,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:23:15,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-21 11:23:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 11:23:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-21 11:23:15,774 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-09-21 11:23:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,775 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-21 11:23:15,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:23:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-21 11:23:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 11:23:15,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,779 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 11:23:15,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:15,779 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,780 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-09-21 11:23:15,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115173733] [2020-09-21 11:23:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,971 FATAL L256 erpolLogProxyWrapper]: Difference in size: 3 [2020-09-21 11:23:15,972 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,972 FATAL L256 erpolLogProxyWrapper]: Difference in width: 4 [2020-09-21 11:23:15,972 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:23:15,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-21 11:23:15,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-21 11:23:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:23:15,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:16,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,064 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,064 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,065 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,065 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:16,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:16,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:16,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:16,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,096 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,096 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,096 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,097 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:16,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:16,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,110 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,111 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,111 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,111 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:16,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:16,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:16,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:16,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:23:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,126 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,127 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,127 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,127 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:16,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:16,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:16,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,183 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,183 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,184 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,184 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:16,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:23:16,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:23:16,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:23:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,265 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,265 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,265 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,266 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 11:23:16,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:23:16,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:23:16,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:23:16,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,420 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 11:23:16,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115173733] [2020-09-21 11:23:16,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:16,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 11:23:16,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110141070] [2020-09-21 11:23:16,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:23:16,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:23:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:23:16,425 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 11 states. [2020-09-21 11:23:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:16,989 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-09-21 11:23:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:23:16,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-09-21 11:23:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:16,994 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:23:16,994 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 11:23:16,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:23:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 11:23:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-09-21 11:23:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:23:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-09-21 11:23:17,006 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-09-21 11:23:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:17,007 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-09-21 11:23:17,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:23:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-09-21 11:23:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 11:23:17,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:17,010 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 11:23:17,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:17,010 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-09-21 11:23:17,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:17,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594939221] [2020-09-21 11:23:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,065 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,065 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,065 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:23:17,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:23:17,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-21 11:23:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:23:17,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,119 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,120 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,120 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,120 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:17,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:17,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:17,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,145 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,145 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,145 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,145 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:17,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:17,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:17,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,157 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,157 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,157 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,158 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:17,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:17,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:17,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:17,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:17,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:23:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,169 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,169 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,169 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:17,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:17,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:17,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:17,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:17,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,195 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,196 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,196 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,196 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:17,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:23:17,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:23:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:23:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:23:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,226 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,226 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,227 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,227 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 11:23:17,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:23:17,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:23:17,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:23:17,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,362 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 11:23:17,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594939221] [2020-09-21 11:23:17,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:17,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 11:23:17,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704966914] [2020-09-21 11:23:17,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:23:17,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:23:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:23:17,366 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-09-21 11:23:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:17,796 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 11:23:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:23:17,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-09-21 11:23:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:17,798 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:23:17,798 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:23:17,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:23:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:23:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-21 11:23:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:23:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-09-21 11:23:17,815 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-09-21 11:23:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:17,816 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-09-21 11:23:17,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:23:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-09-21 11:23:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 11:23:17,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:17,821 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 11:23:17,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:17,821 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-09-21 11:23:17,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:17,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914541599] [2020-09-21 11:23:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,226 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:18,226 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -16 [2020-09-21 11:23:18,226 FATAL L256 erpolLogProxyWrapper]: Difference in width: 16 [2020-09-21 11:23:18,228 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 11:23:18,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-09-21 11:23:18,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:23:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-21 11:23:18,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:23:18,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:18,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,397 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,397 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,398 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,398 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:18,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:18,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:18,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:18,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,442 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,442 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,443 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,443 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:18,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:18,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:18,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:18,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:18,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:18,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,458 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,458 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,458 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,459 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:18,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:18,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:18,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:18,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:23:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,551 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,552 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,552 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,552 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:18,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 11:23:18,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:18,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:18,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:23:18,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:18,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,752 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,752 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,752 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,752 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:18,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-21 11:23:18,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:18,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:18,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:18,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:18,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:23:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:19,009 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:19,009 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:19,009 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:19,010 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:19,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 11:23:19,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:19,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:23:19,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:23:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:23:19,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:19,187 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 11:23:19,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914541599] [2020-09-21 11:23:19,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:19,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:23:19,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001740657] [2020-09-21 11:23:19,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:23:19,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:23:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:23:19,191 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 19 states. [2020-09-21 11:23:19,620 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-09-21 11:23:19,913 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-09-21 11:23:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:21,245 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-09-21 11:23:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:23:21,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-09-21 11:23:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:21,249 INFO L225 Difference]: With dead ends: 57 [2020-09-21 11:23:21,250 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:23:21,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:23:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:23:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 11:23:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:23:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-09-21 11:23:21,261 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-09-21 11:23:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:21,261 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-09-21 11:23:21,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:23:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-09-21 11:23:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 11:23:21,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:21,263 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 11:23:21,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:21,263 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:21,264 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-09-21 11:23:21,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:21,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434247690] [2020-09-21 11:23:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,758 FATAL L256 erpolLogProxyWrapper]: Difference in size: 5 [2020-09-21 11:23:21,759 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -7 [2020-09-21 11:23:21,759 FATAL L256 erpolLogProxyWrapper]: Difference in width: 11 [2020-09-21 11:23:21,759 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:23:21,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-09-21 11:23:21,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:23:21,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:23:21,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:23:21,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:21,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,949 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:21,949 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:21,949 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:21,949 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:21,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:21,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:21,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:21,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:21,987 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:21,987 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:21,987 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:21,988 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:21,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:21,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:21,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:21,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:21,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:21,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:21,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:21,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:21,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:22,028 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:22,028 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:22,028 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:22,029 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:22,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:22,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:22,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:23:22,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:22,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:22,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:22,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:23:22,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:22,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:23:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:22,164 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:22,165 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:22,165 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:22,165 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:22,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:22,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:22,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 11:23:22,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:22,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:22,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:22,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:22,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:22,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:22,548 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:22,548 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:22,549 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:22,549 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:22,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:22,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:22,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 11:23:22,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:22,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:22,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:23:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:22,897 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:22,897 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:22,898 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:22,898 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:22,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:23:22,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:22,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 11:23:22,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:22,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:22,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:23:22,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:23:22,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:23,308 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 11:23:23,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434247690] [2020-09-21 11:23:23,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:23,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:23:23,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957279992] [2020-09-21 11:23:23,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:23:23,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:23:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:23:23,312 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 21 states. [2020-09-21 11:23:23,730 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-09-21 11:23:24,089 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-09-21 11:23:24,981 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-09-21 11:23:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:26,099 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-09-21 11:23:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:23:26,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-09-21 11:23:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:26,102 INFO L225 Difference]: With dead ends: 64 [2020-09-21 11:23:26,102 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 11:23:26,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:23:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 11:23:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-09-21 11:23:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 11:23:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-09-21 11:23:26,113 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 53 [2020-09-21 11:23:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:26,116 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-09-21 11:23:26,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:23:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-09-21 11:23:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 11:23:26,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:26,117 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 11:23:26,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:23:26,117 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 1 times [2020-09-21 11:23:26,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:26,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457820929] [2020-09-21 11:23:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:26,388 FATAL L256 erpolLogProxyWrapper]: Difference in size: 5 [2020-09-21 11:23:26,389 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -18 [2020-09-21 11:23:26,389 FATAL L256 erpolLogProxyWrapper]: Difference in width: 18 [2020-09-21 11:23:26,389 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:26,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:23:26,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:26,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-21 11:23:26,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:23:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 11:23:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 11:23:26,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:26,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:26,505 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:26,505 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:26,506 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:26,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:26,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:26,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:26,532 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:26,532 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:26,532 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:26,533 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:26,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:26,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:26,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:26,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:26,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:26,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:26,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:26,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:26,543 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:26,543 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:26,543 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:26,543 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:26,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:26,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:26,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:26,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:26,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:26,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:26,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:26,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:26,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:23:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:26,581 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:26,582 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:26,582 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:26,582 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:26,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:26,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:26,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:23:26,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:26,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:26,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:26,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:23:26,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:26,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:26,737 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:26,737 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:26,737 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:26,737 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:26,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:23:26,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 11:23:26,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:23:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:26,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:26,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:23:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:26,982 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:26,983 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:26,983 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:26,983 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:26,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:23:26,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:26,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:23:26,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:26,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:23:26,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:23:26,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:23:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:27,290 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 11:23:27,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457820929] [2020-09-21 11:23:27,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:27,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:23:27,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299737739] [2020-09-21 11:23:27,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:23:27,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:27,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:23:27,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:23:27,293 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 16 states. [2020-09-21 11:23:27,807 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-09-21 11:23:27,979 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-09-21 11:23:28,452 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-09-21 11:23:28,724 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-09-21 11:23:29,047 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-09-21 11:23:29,340 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-09-21 11:23:29,525 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-09-21 11:23:29,693 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-09-21 11:23:29,882 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-09-21 11:23:30,072 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-09-21 11:23:30,270 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-09-21 11:23:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:30,436 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-09-21 11:23:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:23:30,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-21 11:23:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:30,441 INFO L225 Difference]: With dead ends: 75 [2020-09-21 11:23:30,441 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 11:23:30,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:23:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 11:23:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-09-21 11:23:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 11:23:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-09-21 11:23:30,465 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 53 [2020-09-21 11:23:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:30,465 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-09-21 11:23:30,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:23:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-09-21 11:23:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 11:23:30,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:30,470 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 11:23:30,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:23:30,470 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-09-21 11:23:30,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:30,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990437780] [2020-09-21 11:23:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:23:30,544 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:23:30,545 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:23:30,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:23:30,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:30 BoogieIcfgContainer [2020-09-21 11:23:30,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:30,587 INFO L168 Benchmark]: Toolchain (without parser) took 17800.67 ms. Allocated memory was 137.4 MB in the beginning and 399.5 MB in the end (delta: 262.1 MB). Free memory was 99.5 MB in the beginning and 134.9 MB in the end (delta: -35.3 MB). Peak memory consumption was 226.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:30,593 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:23:30,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.10 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 98.9 MB in the beginning and 166.4 MB in the end (delta: -67.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:30,596 INFO L168 Benchmark]: Boogie Preprocessor took 68.74 ms. Allocated memory is still 200.3 MB. Free memory was 166.4 MB in the beginning and 163.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:30,596 INFO L168 Benchmark]: RCFGBuilder took 695.25 ms. Allocated memory is still 200.3 MB. Free memory was 162.9 MB in the beginning and 118.6 MB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:30,597 INFO L168 Benchmark]: TraceAbstraction took 16343.21 ms. Allocated memory was 200.3 MB in the beginning and 399.5 MB in the end (delta: 199.2 MB). Free memory was 117.9 MB in the beginning and 134.9 MB in the end (delta: -16.9 MB). Peak memory consumption was 182.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:30,610 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.10 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 98.9 MB in the beginning and 166.4 MB in the end (delta: -67.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.74 ms. Allocated memory is still 200.3 MB. Free memory was 166.4 MB in the beginning and 163.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 695.25 ms. Allocated memory is still 200.3 MB. Free memory was 162.9 MB in the beginning and 118.6 MB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16343.21 ms. Allocated memory was 200.3 MB in the beginning and 399.5 MB in the end (delta: 199.2 MB). Free memory was 117.9 MB in the beginning and 134.9 MB in the end (delta: -16.9 MB). Peak memory consumption was 182.3 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: 16.2s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 465 SDslu, 584 SDs, 0 SdLazy, 1987 SolverSat, 286 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, 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, 6 MinimizatonAttempts, 35 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 351 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 289 ConstructedInterpolants, 0 QuantifiedInterpolants, 185731 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 140/201 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...