/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:57:19,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:57:19,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:57:19,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:57:19,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:57:19,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:57:19,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:57:19,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:57:19,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:57:19,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:57:19,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:57:19,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:57:19,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:57:19,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:57:19,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:57:19,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:57:19,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:57:19,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:57:19,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:57:19,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:57:19,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:57:19,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:57:19,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:57:19,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:57:19,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:57:19,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:57:19,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:57:19,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:57:19,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:57:19,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:57:19,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:57:19,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:57:19,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:57:19,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:57:19,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:57:19,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:57:19,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:57:19,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:57:19,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:57:19,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:57:19,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:57:19,612 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 [2020-09-25 00:57:19,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:57:19,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:57:19,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:57:19,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:57:19,641 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:57:19,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:57:19,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:57:19,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:57:19,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:57:19,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:57:19,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:57:19,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:57:19,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:57:19,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:57:19,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:57:19,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:57:19,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:57:19,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:57:19,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:57:19,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:57:19,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:57:19,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:57:19,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:57:19,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:57:19,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:57:19,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:57:19,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:57:19,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:57:19,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:57:19,647 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 00:57:20,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:57:20,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:57:20,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:57:20,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:57:20,167 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:57:20,168 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-09-25 00:57:20,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e41f4c7f4/64a52b25597348e0b02d897bb5f6fd78/FLAGf0e854c4b [2020-09-25 00:57:20,920 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:57:20,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_search-1.i [2020-09-25 00:57:20,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e41f4c7f4/64a52b25597348e0b02d897bb5f6fd78/FLAGf0e854c4b [2020-09-25 00:57:21,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e41f4c7f4/64a52b25597348e0b02d897bb5f6fd78 [2020-09-25 00:57:21,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:57:21,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:57:21,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:57:21,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:57:21,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:57:21,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcb8091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21, skipping insertion in model container [2020-09-25 00:57:21,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:57:21,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:57:21,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:57:21,739 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:57:21,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:57:21,865 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:57:21,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21 WrapperNode [2020-09-25 00:57:21,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:57:21,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:57:21,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:57:21,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:57:21,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (1/1) ... [2020-09-25 00:57:21,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:57:21,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:57:21,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:57:21,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:57:21,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (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 [2020-09-25 00:57:22,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:57:22,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:57:22,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:57:22,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 00:57:22,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 00:57:22,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-25 00:57:22,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-25 00:57:22,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-25 00:57:22,025 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-09-25 00:57:22,025 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-09-25 00:57:22,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:57:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:57:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:57:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 00:57:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 00:57:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 00:57:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 00:57:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 00:57:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 00:57:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 00:57:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 00:57:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 00:57:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 00:57:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 00:57:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 00:57:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 00:57:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 00:57:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 00:57:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 00:57:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 00:57:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 00:57:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-25 00:57:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-25 00:57:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-25 00:57:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 00:57:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 00:57:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 00:57:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 00:57:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 00:57:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 00:57:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 00:57:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 00:57:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 00:57:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 00:57:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 00:57:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 00:57:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 00:57:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 00:57:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 00:57:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 00:57:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 00:57:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 00:57:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 00:57:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 00:57:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 00:57:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 00:57:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 00:57:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 00:57:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 00:57:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 00:57:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 00:57:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 00:57:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 00:57:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 00:57:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 00:57:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 00:57:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 00:57:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 00:57:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 00:57:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 00:57:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 00:57:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 00:57:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 00:57:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 00:57:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 00:57:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 00:57:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:57:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 00:57:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 00:57:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 00:57:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 00:57:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 00:57:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 00:57:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 00:57:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 00:57:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 00:57:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 00:57:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 00:57:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 00:57:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 00:57:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 00:57:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 00:57:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 00:57:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 00:57:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 00:57:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 00:57:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 00:57:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 00:57:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 00:57:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 00:57:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 00:57:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 00:57:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 00:57:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 00:57:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 00:57:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 00:57:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 00:57:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 00:57:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 00:57:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 00:57:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 00:57:22,043 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 00:57:22,043 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 00:57:22,043 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 00:57:22,043 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 00:57:22,043 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 00:57:22,043 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 00:57:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 00:57:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 00:57:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 00:57:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-09-25 00:57:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:57:22,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 00:57:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-09-25 00:57:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 00:57:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:57:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 00:57:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:57:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:57:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:57:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:57:22,655 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:57:22,655 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 00:57:22,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:57:22 BoogieIcfgContainer [2020-09-25 00:57:22,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:57:22,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:57:22,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:57:22,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:57:22,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:57:21" (1/3) ... [2020-09-25 00:57:22,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c18b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:57:22, skipping insertion in model container [2020-09-25 00:57:22,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:21" (2/3) ... [2020-09-25 00:57:22,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c18b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:57:22, skipping insertion in model container [2020-09-25 00:57:22,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:57:22" (3/3) ... [2020-09-25 00:57:22,670 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-09-25 00:57:22,682 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:57:22,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:57:22,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:57:22,752 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:57:22,753 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:57:22,753 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:57:22,753 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:57:22,753 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:57:22,753 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:57:22,754 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:57:22,754 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:57:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-09-25 00:57:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-25 00:57:22,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:22,795 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:22,796 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:22,805 INFO L82 PathProgramCache]: Analyzing trace with hash 42223880, now seen corresponding path program 1 times [2020-09-25 00:57:22,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:22,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097090106] [2020-09-25 00:57:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:23,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:23,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:28,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-25 00:57:28,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:57:28,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 00:57:28,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:28,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:28,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-25 00:57:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:57:28,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:28,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:28,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:57:28,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:28,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 00:57:28,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:28,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:57:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:28,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:28,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:28,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:28,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 00:57:28,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:28,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:28,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:28,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:28,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:28,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 00:57:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:28,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:28,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:28,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 00:57:28,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:28,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-25 00:57:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:28,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:28,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:28,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 00:57:28,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:28,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:28,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-25 00:57:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:28,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:28,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:28,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:28,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 00:57:28,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:28,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:28,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:28,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:28,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-25 00:57:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:28,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:28,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 00:57:28,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:57:28,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-25 00:57:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-25 00:57:28,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097090106] [2020-09-25 00:57:28,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:28,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:57:28,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362070759] [2020-09-25 00:57:28,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:57:28,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:57:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:57:28,496 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 4 states. [2020-09-25 00:57:28,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:28,703 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-09-25 00:57:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 00:57:28,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-09-25 00:57:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:28,720 INFO L225 Difference]: With dead ends: 100 [2020-09-25 00:57:28,720 INFO L226 Difference]: Without dead ends: 63 [2020-09-25 00:57:28,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:57:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-25 00:57:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-25 00:57:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 00:57:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-09-25 00:57:28,789 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 82 [2020-09-25 00:57:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:28,792 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-09-25 00:57:28,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:57:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-09-25 00:57:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-25 00:57:28,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:28,797 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:28,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:57:28,798 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1818163735, now seen corresponding path program 1 times [2020-09-25 00:57:28,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:28,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274861191] [2020-09-25 00:57:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:28,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:28,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:29,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:30,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:33,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:33,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-25 00:57:33,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:57:33,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 00:57:33,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:33,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:57:33,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-09-25 00:57:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 00:57:33,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:33,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:33,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:33,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:33,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:57:33,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:33,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:57:33,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:33,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:33,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:33,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:33,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:57:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:33,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:33,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:33,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:33,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 00:57:33,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:33,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:33,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 00:57:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:33,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:34,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:34,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:34,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:34,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 00:57:34,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:34,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:34,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:34,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:34,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:34,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-25 00:57:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:34,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:34,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:34,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 00:57:34,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:34,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-25 00:57:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:34,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:34,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:34,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:34,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 00:57:34,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:57:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:34,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-25 00:57:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:34,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:34,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:34,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:34,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:57:34,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 00:57:34,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:34,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:34,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-25 00:57:34,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 00:57:34,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-09-25 00:57:34,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274861191] [2020-09-25 00:57:34,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:34,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 00:57:34,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432396730] [2020-09-25 00:57:34,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 00:57:34,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 00:57:34,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:57:34,411 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 10 states. [2020-09-25 00:57:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:35,220 INFO L93 Difference]: Finished difference Result 134 states and 149 transitions. [2020-09-25 00:57:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 00:57:35,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-09-25 00:57:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:35,224 INFO L225 Difference]: With dead ends: 134 [2020-09-25 00:57:35,224 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 00:57:35,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:57:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 00:57:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-09-25 00:57:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 00:57:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-09-25 00:57:35,239 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 86 [2020-09-25 00:57:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:35,240 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-09-25 00:57:35,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 00:57:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-09-25 00:57:35,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-25 00:57:35,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:35,242 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:35,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:57:35,243 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1346991358, now seen corresponding path program 1 times [2020-09-25 00:57:35,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:35,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692452354] [2020-09-25 00:57:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:35,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:36,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:36,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-09-25 00:57:36,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-09-25 00:57:36,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 00:57:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-09-25 00:57:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 00:57:36,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:36,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:36,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:36,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:36,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:57:36,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:36,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:57:36,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:36,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:57:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:36,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:36,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:36,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:36,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:57:36,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:36,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:36,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:36,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:36,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 00:57:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:36,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:36,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:36,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:36,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:57:36,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:36,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:36,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 00:57:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:36,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:36,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:36,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:36,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:36,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:57:36,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:36,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:36,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 00:57:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:36,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:36,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:36,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:36,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:36,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-25 00:57:36,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:36,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:57:36,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:36,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 00:57:36,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:36,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-25 00:57:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:36,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:36,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:36,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 00:57:36,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:36,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 00:57:36,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:57:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:57:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 00:57:36,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-09-25 00:57:36,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692452354] [2020-09-25 00:57:36,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:36,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-25 00:57:36,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258089608] [2020-09-25 00:57:36,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:57:36,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:36,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:57:36,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:57:36,740 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 13 states. [2020-09-25 00:57:37,541 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-09-25 00:57:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:37,858 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-09-25 00:57:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:57:37,859 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-09-25 00:57:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:37,860 INFO L225 Difference]: With dead ends: 91 [2020-09-25 00:57:37,861 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 00:57:37,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:57:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 00:57:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-09-25 00:57:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 00:57:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-09-25 00:57:37,871 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 91 [2020-09-25 00:57:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:37,871 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-09-25 00:57:37,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:57:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-09-25 00:57:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-25 00:57:37,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:37,873 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:37,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:57:37,874 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:37,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2140447576, now seen corresponding path program 1 times [2020-09-25 00:57:37,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:37,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576986104] [2020-09-25 00:57:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:37,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:38,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:39,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:40,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:42,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:42,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-25 00:57:42,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:57:42,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 00:57:42,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:57:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-09-25 00:57:42,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 00:57:42,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:43,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:43,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:43,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:57:43,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:43,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:57:43,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:43,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:57:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:43,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:43,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:43,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:43,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:43,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 00:57:43,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:43,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:43,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:43,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:43,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:43,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 00:57:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:43,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:43,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:43,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:43,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:43,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:57:43,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:43,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:43,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 00:57:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:43,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:43,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:43,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:43,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:43,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 00:57:43,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:43,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:43,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:43,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:43,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:43,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 00:57:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:43,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:43,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:43,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:43,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 00:57:43,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:57:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 00:57:43,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:43,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-25 00:57:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:43,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:43,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:43,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:43,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 00:57:43,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:57:43,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-09-25 00:57:43,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:43,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:57:43,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-25 00:57:43,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 00:57:43,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-09-25 00:57:43,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576986104] [2020-09-25 00:57:43,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:57:43,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:57:43,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326824475] [2020-09-25 00:57:43,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:57:43,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:57:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:57:43,610 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 12 states. [2020-09-25 00:57:44,314 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-09-25 00:57:44,471 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-09-25 00:57:44,601 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-09-25 00:57:44,742 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-09-25 00:57:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:45,016 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-09-25 00:57:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:57:45,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2020-09-25 00:57:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:45,020 INFO L225 Difference]: With dead ends: 128 [2020-09-25 00:57:45,020 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 00:57:45,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:57:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 00:57:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2020-09-25 00:57:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 00:57:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-09-25 00:57:45,032 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 99 [2020-09-25 00:57:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:45,033 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-09-25 00:57:45,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:57:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-09-25 00:57:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-25 00:57:45,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:45,035 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-09-25 00:57:45,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:57:45,035 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1242921541, now seen corresponding path program 1 times [2020-09-25 00:57:45,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:45,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609596451] [2020-09-25 00:57:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:45,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:46,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:50,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:50,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-25 00:57:50,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:57:50,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 00:57:50,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:50,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 00:57:50,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 00:57:50,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 00:57:50,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:50,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:50,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:50,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:50,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:57:50,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:50,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:57:50,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:50,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:50,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:50,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:57:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:50,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:50,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:50,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:50,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:50,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 00:57:50,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:50,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:50,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:50,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 00:57:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:50,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:50,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:50,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:50,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:50,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 00:57:50,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:50,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:50,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 00:57:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:50,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:50,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:50,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:50,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:50,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-25 00:57:50,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:50,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:57:50,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:50,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 00:57:50,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 00:57:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:50,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:50,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:50,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:50,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:50,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-09-25 00:57:50,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:50,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:57:50,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 00:57:50,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 00:57:50,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:51,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-25 00:57:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:51,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:51,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:51,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 00:57:51,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:51,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-25 00:57:51,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 00:57:51,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 00:57:51,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 00:57:51,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 00:57:51,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609596451] [2020-09-25 00:57:51,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:57:51,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 00:57:51,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891022706] [2020-09-25 00:57:51,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 00:57:51,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:51,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 00:57:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-09-25 00:57:51,458 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 25 states. [2020-09-25 00:57:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:54,149 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-09-25 00:57:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 00:57:54,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2020-09-25 00:57:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:54,151 INFO L225 Difference]: With dead ends: 113 [2020-09-25 00:57:54,151 INFO L226 Difference]: Without dead ends: 100 [2020-09-25 00:57:54,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2020-09-25 00:57:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-25 00:57:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2020-09-25 00:57:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-25 00:57:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-09-25 00:57:54,180 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 101 [2020-09-25 00:57:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:54,183 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-09-25 00:57:54,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-25 00:57:54,184 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-09-25 00:57:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-25 00:57:54,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:54,187 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-09-25 00:57:54,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:57:54,187 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1667050223, now seen corresponding path program 2 times [2020-09-25 00:57:54,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:54,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936022092] [2020-09-25 00:57:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:54,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:56,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:56,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:59,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-25 00:57:59,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:57:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 00:57:59,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:57:59,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-09-25 00:57:59,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 00:57:59,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:59,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:59,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:59,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:59,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:57:59,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:59,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:57:59,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:59,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:59,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:59,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:59,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 00:57:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:59,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:59,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:59,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 00:57:59,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:59,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 00:57:59,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:59,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:59,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 00:57:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:59,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:59,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:59,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:59,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:59,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:57:59,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:59,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:59,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:59,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 00:57:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:59,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:59,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:59,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:59,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-25 00:57:59,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:59,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:57:59,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:59,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 00:57:59,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:57:59,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 00:57:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:59,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:59,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:59,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 00:57:59,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:59,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-25 00:57:59,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:57:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 00:57:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 00:57:59,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:58:00,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-25 00:58:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:58:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:58:00,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:58:00,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:58:00,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 00:58:00,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:58:00,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-09-25 00:58:00,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:58:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:58:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-25 00:58:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:58:00,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:58:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-25 00:58:01,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936022092] [2020-09-25 00:58:01,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:58:01,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 00:58:01,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105564896] [2020-09-25 00:58:01,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 00:58:01,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:58:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 00:58:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:58:01,028 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 24 states. [2020-09-25 00:58:01,932 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-09-25 00:58:02,753 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-09-25 00:58:02,981 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-09-25 00:58:03,272 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-09-25 00:58:03,475 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-09-25 00:58:03,647 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-09-25 00:58:03,833 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-09-25 00:58:04,046 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-09-25 00:58:04,310 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-09-25 00:58:04,665 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-09-25 00:58:04,875 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-09-25 00:58:05,165 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-09-25 00:58:05,382 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-09-25 00:58:05,563 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-09-25 00:58:05,762 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-09-25 00:58:06,093 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-09-25 00:58:06,394 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-09-25 00:58:06,628 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-09-25 00:58:06,891 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-09-25 00:58:07,316 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-09-25 00:58:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:58:07,445 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2020-09-25 00:58:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-25 00:58:07,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-09-25 00:58:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:58:07,449 INFO L225 Difference]: With dead ends: 157 [2020-09-25 00:58:07,449 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 00:58:07,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=453, Invalid=2853, Unknown=0, NotChecked=0, Total=3306 [2020-09-25 00:58:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 00:58:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2020-09-25 00:58:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 00:58:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-09-25 00:58:07,481 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 109 [2020-09-25 00:58:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:58:07,483 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-09-25 00:58:07,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 00:58:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-09-25 00:58:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-25 00:58:07,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:58:07,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 00:58:07,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:58:07,491 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:58:07,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:58:07,491 INFO L82 PathProgramCache]: Analyzing trace with hash -936170188, now seen corresponding path program 2 times [2020-09-25 00:58:07,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:58:07,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85082096] [2020-09-25 00:58:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:58:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:58:07,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking...