/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --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-simple/sll2n_update_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:52:28,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:52:28,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:52:28,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:52:28,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:52:28,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:52:28,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:52:28,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:52:28,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:52:28,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:52:28,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:52:28,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:52:28,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:52:28,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:52:28,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:52:28,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:52:28,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:52:28,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:52:28,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:52:29,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:52:29,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:52:29,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:52:29,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:52:29,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:52:29,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:52:29,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:52:29,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:52:29,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:52:29,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:52:29,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:52:29,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:52:29,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:52:29,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:52:29,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:52:29,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:52:29,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:52:29,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:52:29,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:52:29,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:52:29,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:52:29,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:52:29,027 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 [2020-09-24 23:52:29,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:52:29,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:52:29,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:52:29,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:52:29,093 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:52:29,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:52:29,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:52:29,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:52:29,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:52:29,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:52:29,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:52:29,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:52:29,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:52:29,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:52:29,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:52:29,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:52:29,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:52:29,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:52:29,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:52:29,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:52:29,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:52:29,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:52:29,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:52:29,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:52:29,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:52:29,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:52:29,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:52:29,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:52:29,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:52:29,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-24 23:52:29,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:52:29,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:52:29,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:52:29,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:52:29,591 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:52:29,592 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i [2020-09-24 23:52:29,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce69c692b/22f1096ce01847c18cdf47afbccd7065/FLAGd905dbb15 [2020-09-24 23:52:30,289 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:52:30,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i [2020-09-24 23:52:30,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce69c692b/22f1096ce01847c18cdf47afbccd7065/FLAGd905dbb15 [2020-09-24 23:52:30,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce69c692b/22f1096ce01847c18cdf47afbccd7065 [2020-09-24 23:52:30,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:52:30,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:52:30,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:52:30,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:52:30,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:52:30,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:52:30" (1/1) ... [2020-09-24 23:52:30,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157ca41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:30, skipping insertion in model container [2020-09-24 23:52:30,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:52:30" (1/1) ... [2020-09-24 23:52:30,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:52:30,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:52:31,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:52:31,134 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:52:31,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:52:31,268 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:52:31,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31 WrapperNode [2020-09-24 23:52:31,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:52:31,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:52:31,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:52:31,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:52:31,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (1/1) ... [2020-09-24 23:52:31,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (1/1) ... [2020-09-24 23:52:31,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (1/1) ... [2020-09-24 23:52:31,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (1/1) ... [2020-09-24 23:52:31,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (1/1) ... [2020-09-24 23:52:31,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (1/1) ... [2020-09-24 23:52:31,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (1/1) ... [2020-09-24 23:52:31,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:52:31,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:52:31,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:52:31,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:52:31,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (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 [2020-09-24 23:52:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:52:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:52:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 23:52:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 23:52:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 23:52:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-09-24 23:52:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-24 23:52:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-24 23:52:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_get_data_at [2020-09-24 23:52:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_update_at [2020-09-24 23:52:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:52:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:52:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 23:52:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 23:52:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 23:52:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 23:52:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 23:52:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 23:52:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 23:52:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 23:52:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 23:52:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 23:52:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 23:52:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 23:52:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 23:52:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 23:52:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 23:52:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 23:52:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 23:52:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 23:52:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 23:52:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 23:52:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 23:52:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 23:52:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 23:52:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 23:52:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 23:52:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 23:52:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 23:52:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 23:52:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 23:52:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 23:52:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 23:52:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 23:52:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 23:52:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 23:52:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 23:52:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 23:52:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 23:52:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 23:52:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 23:52:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 23:52:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 23:52:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 23:52:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 23:52:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 23:52:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 23:52:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 23:52:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 23:52:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 23:52:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 23:52:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 23:52:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 23:52:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 23:52:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 23:52:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 23:52:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 23:52:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 23:52:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 23:52:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 23:52:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 23:52:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 23:52:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 23:52:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 23:52:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 23:52:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-09-24 23:52:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 23:52:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 23:52:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 23:52:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-24 23:52:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-24 23:52:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 23:52:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 23:52:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure sll_get_data_at [2020-09-24 23:52:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 23:52:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure sll_update_at [2020-09-24 23:52:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:52:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:52:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:52:31,830 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 23:52:32,013 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:52:32,013 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 23:52:32,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:52:32 BoogieIcfgContainer [2020-09-24 23:52:32,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:52:32,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:52:32,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:52:32,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:52:32,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:52:30" (1/3) ... [2020-09-24 23:52:32,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce54336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:52:32, skipping insertion in model container [2020-09-24 23:52:32,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:52:31" (2/3) ... [2020-09-24 23:52:32,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce54336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:52:32, skipping insertion in model container [2020-09-24 23:52:32,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:52:32" (3/3) ... [2020-09-24 23:52:32,045 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2020-09-24 23:52:32,057 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:52:32,069 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:52:32,093 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:52:32,130 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:52:32,130 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:52:32,130 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:52:32,130 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:52:32,131 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:52:32,131 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:52:32,131 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:52:32,131 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:52:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states. [2020-09-24 23:52:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 23:52:32,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:32,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:32,182 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash 482514570, now seen corresponding path program 1 times [2020-09-24 23:52:32,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:32,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27194850] [2020-09-24 23:52:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:32,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:32,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:33,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:33,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 23:52:33,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 23:52:33,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-09-24 23:52:33,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:52:33,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 23:52:33,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 23:52:33,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 23:52:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:33,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:33,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:33,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:33,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:33,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 23:52:33,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:33,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:33,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:33,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 23:52:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:33,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:33,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:33,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:33,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:33,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:33,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 23:52:33,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:33,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:52:33,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:33,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:52:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:33,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 23:52:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:33,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:33,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:33,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:33,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 23:52:33,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:33,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 23:52:33,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-24 23:52:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:33,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27194850] [2020-09-24 23:52:33,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:52:33,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 23:52:33,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468125642] [2020-09-24 23:52:33,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 23:52:33,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:33,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 23:52:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 23:52:33,510 INFO L87 Difference]: Start difference. First operand 103 states. Second operand 6 states. [2020-09-24 23:52:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:34,187 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2020-09-24 23:52:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 23:52:34,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-24 23:52:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:34,205 INFO L225 Difference]: With dead ends: 242 [2020-09-24 23:52:34,206 INFO L226 Difference]: Without dead ends: 144 [2020-09-24 23:52:34,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-24 23:52:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-24 23:52:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 85. [2020-09-24 23:52:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 23:52:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-09-24 23:52:34,339 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 38 [2020-09-24 23:52:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:34,340 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-09-24 23:52:34,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 23:52:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-09-24 23:52:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 23:52:34,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:34,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:34,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:52:34,346 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash -841200203, now seen corresponding path program 1 times [2020-09-24 23:52:34,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:34,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209453392] [2020-09-24 23:52:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:34,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:34,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:34,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:36,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:36,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:39,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:39,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 23:52:39,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:52:39,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 23:52:39,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:39,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:52:39,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 23:52:39,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:52:39,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:39,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:39,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:39,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:39,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:39,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:39,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:52:39,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:39,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:39,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:39,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:39,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 23:52:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:39,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:39,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:39,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:39,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 23:52:39,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:39,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:52:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 23:52:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:52:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:39,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 23:52:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:39,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:39,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:39,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:39,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 23:52:39,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:39,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:39,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-24 23:52:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:39,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:39,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 23:52:39,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:39,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:52:39,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:39,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:39,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 23:52:39,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:39,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 23:52:39,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209453392] [2020-09-24 23:52:39,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:52:39,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 23:52:39,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845039753] [2020-09-24 23:52:39,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 23:52:39,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:39,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 23:52:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:52:39,605 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 8 states. [2020-09-24 23:52:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:39,973 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-09-24 23:52:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 23:52:39,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-24 23:52:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:39,976 INFO L225 Difference]: With dead ends: 147 [2020-09-24 23:52:39,976 INFO L226 Difference]: Without dead ends: 93 [2020-09-24 23:52:39,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-24 23:52:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-24 23:52:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2020-09-24 23:52:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 23:52:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-09-24 23:52:39,992 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 51 [2020-09-24 23:52:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:39,992 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-09-24 23:52:39,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 23:52:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-09-24 23:52:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 23:52:39,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:39,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:39,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:52:39,995 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:39,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1957255427, now seen corresponding path program 1 times [2020-09-24 23:52:39,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:39,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845865629] [2020-09-24 23:52:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:40,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:40,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:45,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 23:52:45,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 23:52:45,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 23:52:45,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:45,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:52:45,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 23:52:45,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 23:52:45,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:45,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:45,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:45,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:45,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:52:45,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:45,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:45,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:45,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 23:52:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:45,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:45,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:52:45,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-09-24 23:52:45,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:45,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:52:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 23:52:45,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:45,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 23:52:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:45,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:45,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 23:52:45,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:45,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 23:52:45,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:45,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:45,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:45,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:52:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:45,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:45,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:45,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:45,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 23:52:45,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:45,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:52:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:52:45,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:45,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 23:52:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:45,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:45,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 23:52:45,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:45,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 23:52:45,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:52:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 23:52:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:52:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 23:52:45,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845865629] [2020-09-24 23:52:45,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:52:45,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 23:52:45,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785112073] [2020-09-24 23:52:45,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 23:52:45,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 23:52:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 23:52:45,438 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 9 states. [2020-09-24 23:52:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:45,856 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-09-24 23:52:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 23:52:45,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-09-24 23:52:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:45,859 INFO L225 Difference]: With dead ends: 139 [2020-09-24 23:52:45,859 INFO L226 Difference]: Without dead ends: 113 [2020-09-24 23:52:45,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-09-24 23:52:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-24 23:52:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-09-24 23:52:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 23:52:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-09-24 23:52:45,887 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 69 [2020-09-24 23:52:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:45,888 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-09-24 23:52:45,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 23:52:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-09-24 23:52:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 23:52:45,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:45,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:45,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 23:52:45,891 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:45,892 INFO L82 PathProgramCache]: Analyzing trace with hash 281898851, now seen corresponding path program 1 times [2020-09-24 23:52:45,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:45,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837826759] [2020-09-24 23:52:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:45,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:46,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:46,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:46,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:50,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:50,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 23:52:50,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:52:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 23:52:50,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:50,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:52:50,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 23:52:50,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 23:52:50,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:50,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:50,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:50,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:50,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:50,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:50,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:52:50,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:50,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:51,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 23:52:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:51,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:51,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:52:51,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:51,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-09-24 23:52:51,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:52:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 23:52:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:51,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 23:52:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:51,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:51,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 23:52:51,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:51,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 23:52:51,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:51,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:51,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:51,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:52:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:51,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:51,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:51,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 23:52:51,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:51,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:52:51,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:51,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 23:52:51,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:51,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 23:52:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:51,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:51,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 23:52:51,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:51,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:52:51,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 23:52:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:51,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 23:52:51,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837826759] [2020-09-24 23:52:51,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:51,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 23:52:51,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606862622] [2020-09-24 23:52:51,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 23:52:51,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:51,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 23:52:51,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 23:52:51,334 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 9 states. [2020-09-24 23:52:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:51,714 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-09-24 23:52:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 23:52:51,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-09-24 23:52:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:51,716 INFO L225 Difference]: With dead ends: 146 [2020-09-24 23:52:51,717 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 23:52:51,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-24 23:52:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 23:52:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-09-24 23:52:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-24 23:52:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-09-24 23:52:51,729 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 76 [2020-09-24 23:52:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:51,729 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-09-24 23:52:51,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 23:52:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-09-24 23:52:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 23:52:51,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:51,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:51,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 23:52:51,732 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1557630765, now seen corresponding path program 2 times [2020-09-24 23:52:51,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:51,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761050373] [2020-09-24 23:52:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:51,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:51,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:52,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:56,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:56,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 23:52:56,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:52:56,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 23:52:56,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:52:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 23:52:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 23:52:56,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:56,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:56,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:56,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:56,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:56,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:56,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:52:56,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:56,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:56,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:56,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:56,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:56,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 23:52:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:56,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:56,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:57,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:57,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:52:57,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:57,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-24 23:52:57,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:52:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 23:52:57,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:57,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 23:52:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:57,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:57,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:57,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 23:52:57,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 23:52:57,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:57,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:52:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:57,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:57,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:57,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:57,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:57,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 23:52:57,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:57,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:52:57,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-24 23:52:57,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:52:57,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:57,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 23:52:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:57,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:57,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:57,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:57,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 23:52:57,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:57,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:57,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-24 23:52:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:57,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:57,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:57,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 23:52:57,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:57,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 23:52:57,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 23:52:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:57,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 23:52:57,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761050373] [2020-09-24 23:52:57,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:57,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 23:52:57,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174031172] [2020-09-24 23:52:57,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 23:52:57,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:57,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 23:52:57,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 23:52:57,189 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 9 states. [2020-09-24 23:52:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:57,605 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2020-09-24 23:52:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 23:52:57,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-09-24 23:52:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:57,608 INFO L225 Difference]: With dead ends: 178 [2020-09-24 23:52:57,608 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 23:52:57,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-24 23:52:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 23:52:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-09-24 23:52:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 23:52:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-09-24 23:52:57,630 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 89 [2020-09-24 23:52:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:57,630 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-09-24 23:52:57,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 23:52:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-09-24 23:52:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 23:52:57,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:57,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:57,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 23:52:57,633 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1758688301, now seen corresponding path program 1 times [2020-09-24 23:52:57,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:57,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556103100] [2020-09-24 23:52:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:57,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:01,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:02,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:02,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:53:02,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-24 23:53:02,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 23:53:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5174 [2020-09-24 23:53:02,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:53:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 23:53:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 23:53:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-24 23:53:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:53:03,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:53:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:53:03,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:03,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:53:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:53:03,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:53:03,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:53:03,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:53:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:53:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:53:03,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:53:03,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:53:03,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 23:53:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:53:03,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:03,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:04,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:53:04,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:53:04,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:53:04,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-09-24 23:53:04,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:53:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 23:53:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:53:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 23:53:04,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:53:04,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 23:53:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:53:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:04,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:53:04,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 23:53:04,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:53:04,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 23:53:04,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:53:04,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:53:04,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:53:04,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 23:53:04,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:53:04,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 23:53:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:53:04,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:04,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:53:04,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 23:53:04,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:53:04,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-24 23:53:04,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:53:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 23:53:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 23:53:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 23:53:04,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:53:05,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 23:53:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:53:05,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:05,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:53:05,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:53:05,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:53:05,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-24 23:53:05,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:53:05,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 23:53:05,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 23:53:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 23:53:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:53:05,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 23:53:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:53:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:05,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:53:05,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 23:53:05,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:53:05,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-24 23:53:05,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:53:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 23:53:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:53:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 23:53:05,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:53:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 23:53:06,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556103100] [2020-09-24 23:53:06,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:53:06,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-24 23:53:06,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545224342] [2020-09-24 23:53:06,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-24 23:53:06,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:53:06,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-24 23:53:06,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 23:53:06,039 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 41 states. [2020-09-24 23:53:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:53:11,718 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2020-09-24 23:53:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 23:53:11,719 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-09-24 23:53:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:53:11,722 INFO L225 Difference]: With dead ends: 232 [2020-09-24 23:53:11,722 INFO L226 Difference]: Without dead ends: 196 [2020-09-24 23:53:11,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=483, Invalid=6827, Unknown=0, NotChecked=0, Total=7310 [2020-09-24 23:53:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-24 23:53:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 162. [2020-09-24 23:53:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-24 23:53:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2020-09-24 23:53:11,746 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 96 [2020-09-24 23:53:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:53:11,747 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2020-09-24 23:53:11,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-24 23:53:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2020-09-24 23:53:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 23:53:11,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:53:11,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:53:11,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 23:53:11,751 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:53:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:53:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 111309459, now seen corresponding path program 2 times [2020-09-24 23:53:11,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:53:11,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843312090] [2020-09-24 23:53:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:53:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:53:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:11,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:11,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:53:12,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking...