/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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:17:01,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:17:01,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:17:01,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:17:01,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:17:01,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:17:01,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:17:01,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:17:01,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:17:01,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:17:01,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:17:01,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:17:01,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:17:01,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:17:01,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:17:01,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:17:01,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:17:01,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:17:01,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:17:01,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:17:01,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:17:01,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:17:01,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:17:01,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:17:01,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:17:01,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:17:01,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:17:01,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:17:01,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:17:01,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:17:01,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:17:01,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:17:01,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:17:01,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:17:01,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:17:01,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:17:01,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:17:01,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:17:01,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:17:01,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:17:01,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:17:01,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:17:01,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:17:01,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:17:01,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:17:01,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:17:01,759 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:17:01,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:17:01,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:17:01,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:17:01,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:17:01,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:17:01,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:17:01,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:17:01,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:17:01,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:17:01,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:17:01,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:17:01,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:17:01,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:17:01,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:17:01,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:17:01,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:17:01,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:17:01,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:17:01,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:17:01,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:17:01,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:17:01,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:17:01,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:17:01,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:17:01,770 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:17:02,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:17:02,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:17:02,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:17:02,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:17:02,363 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:17:02,365 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-09-24 18:17:02,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7846c41e0/3a854003696d4bd38f9cc881fdb75f10/FLAG55184937a [2020-09-24 18:17:03,094 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:17:03,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-09-24 18:17:03,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7846c41e0/3a854003696d4bd38f9cc881fdb75f10/FLAG55184937a [2020-09-24 18:17:03,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7846c41e0/3a854003696d4bd38f9cc881fdb75f10 [2020-09-24 18:17:03,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:17:03,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:17:03,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:17:03,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:17:03,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:17:03,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:17:03" (1/1) ... [2020-09-24 18:17:03,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4700e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:03, skipping insertion in model container [2020-09-24 18:17:03,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:17:03" (1/1) ... [2020-09-24 18:17:03,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:17:03,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:17:03,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:17:03,974 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:17:04,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:17:04,109 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:17:04,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04 WrapperNode [2020-09-24 18:17:04,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:17:04,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:17:04,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:17:04,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:17:04,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... [2020-09-24 18:17:04,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... [2020-09-24 18:17:04,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... [2020-09-24 18:17:04,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... [2020-09-24 18:17:04,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... [2020-09-24 18:17:04,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... [2020-09-24 18:17:04,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... [2020-09-24 18:17:04,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:17:04,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:17:04,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:17:04,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:17:04,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:17:04,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:17:04,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:17:04,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 18:17:04,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 18:17:04,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-24 18:17:04,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-24 18:17:04,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-24 18:17:04,281 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 18:17:04,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:17:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:17:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:17:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 18:17:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 18:17:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 18:17:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 18:17:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 18:17:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 18:17:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 18:17:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 18:17:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 18:17:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 18:17:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 18:17:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 18:17:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 18:17:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 18:17:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 18:17:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 18:17:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 18:17:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 18:17:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-24 18:17:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-24 18:17:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-24 18:17:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 18:17:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 18:17:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 18:17:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 18:17:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 18:17:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 18:17:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 18:17:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 18:17:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 18:17:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 18:17:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 18:17:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 18:17:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 18:17:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 18:17:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 18:17:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 18:17:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 18:17:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 18:17:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 18:17:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 18:17:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 18:17:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 18:17:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 18:17:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 18:17:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 18:17:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 18:17:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 18:17:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 18:17:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 18:17:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 18:17:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 18:17:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 18:17:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 18:17:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 18:17:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 18:17:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:17:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 18:17:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 18:17:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 18:17:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:17:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 18:17:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 18:17:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 18:17:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 18:17:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 18:17:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 18:17:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 18:17:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 18:17:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 18:17:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 18:17:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 18:17:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 18:17:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 18:17:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 18:17:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 18:17:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 18:17:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 18:17:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 18:17:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 18:17:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 18:17:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 18:17:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 18:17:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 18:17:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 18:17:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:17:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 18:17:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:17:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 18:17:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 18:17:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:17:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:17:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:17:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:17:04,688 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 18:17:04,983 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:17:04,984 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 18:17:04,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:17:04 BoogieIcfgContainer [2020-09-24 18:17:04,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:17:04,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:17:04,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:17:05,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:17:05,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:17:03" (1/3) ... [2020-09-24 18:17:05,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a11ba62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:17:05, skipping insertion in model container [2020-09-24 18:17:05,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:04" (2/3) ... [2020-09-24 18:17:05,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a11ba62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:17:05, skipping insertion in model container [2020-09-24 18:17:05,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:17:04" (3/3) ... [2020-09-24 18:17:05,008 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-09-24 18:17:05,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:17:05,041 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:17:05,064 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:17:05,094 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:17:05,094 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:17:05,094 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:17:05,094 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:17:05,094 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:17:05,095 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:17:05,095 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:17:05,095 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:17:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-24 18:17:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 18:17:05,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:05,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:17:05,128 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times [2020-09-24 18:17:05,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:05,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553253285] [2020-09-24 18:17:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:05,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:05,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:05,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:05,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:05,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 18:17:05,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:17:05,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-09-24 18:17:05,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 18:17:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:05,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:17:05,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:05,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:05,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:05,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:05,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 18:17:05,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:05,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:05,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553253285] [2020-09-24 18:17:05,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:17:05,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:17:05,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980747774] [2020-09-24 18:17:05,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:17:05,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:17:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:17:06,016 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-09-24 18:17:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:06,189 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-09-24 18:17:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:17:06,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-24 18:17:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:06,204 INFO L225 Difference]: With dead ends: 110 [2020-09-24 18:17:06,205 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 18:17:06,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:17:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 18:17:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-24 18:17:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 18:17:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-24 18:17:06,265 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 22 [2020-09-24 18:17:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:06,266 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-24 18:17:06,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:17:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-24 18:17:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 18:17:06,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:06,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:17:06,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:17:06,268 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1237633361, now seen corresponding path program 1 times [2020-09-24 18:17:06,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:06,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476126145] [2020-09-24 18:17:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:06,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:06,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:06,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 18:17:06,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:06,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-09-24 18:17:06,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:17:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:17:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 18:17:06,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:06,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:06,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:06,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:06,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:06,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:17:06,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:06,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476126145] [2020-09-24 18:17:06,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:17:06,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:17:06,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102695537] [2020-09-24 18:17:06,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:17:06,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:06,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:17:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:17:06,584 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-09-24 18:17:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:06,868 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-09-24 18:17:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:17:06,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-09-24 18:17:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:06,872 INFO L225 Difference]: With dead ends: 134 [2020-09-24 18:17:06,872 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 18:17:06,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:17:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 18:17:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2020-09-24 18:17:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 18:17:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-09-24 18:17:06,887 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2020-09-24 18:17:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:06,887 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-09-24 18:17:06,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:17:06,888 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-09-24 18:17:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 18:17:06,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:06,890 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:06,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:17:06,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times [2020-09-24 18:17:06,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:06,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995200479] [2020-09-24 18:17:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:07,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:07,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 18:17:07,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:07,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-24 18:17:07,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:07,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:17:07,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:17:07,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:17:07,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:07,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:07,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:07,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:07,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:07,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:17:07,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:07,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:07,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:07,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995200479] [2020-09-24 18:17:07,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:17:07,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:17:07,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386094990] [2020-09-24 18:17:07,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:17:07,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:17:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:17:07,135 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2020-09-24 18:17:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:07,411 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-09-24 18:17:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:17:07,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 18:17:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:07,414 INFO L225 Difference]: With dead ends: 137 [2020-09-24 18:17:07,414 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 18:17:07,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:17:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 18:17:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67. [2020-09-24 18:17:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 18:17:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-09-24 18:17:07,432 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36 [2020-09-24 18:17:07,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:07,432 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-09-24 18:17:07,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:17:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-09-24 18:17:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 18:17:07,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:07,438 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:07,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:17:07,440 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times [2020-09-24 18:17:07,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:07,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280131026] [2020-09-24 18:17:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:07,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:07,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:07,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 18:17:07,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:07,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-24 18:17:07,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:17:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:17:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 18:17:07,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:07,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:07,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:07,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:07,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:17:07,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:07,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:07,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:07,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:07,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280131026] [2020-09-24 18:17:07,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:17:07,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:17:07,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307063107] [2020-09-24 18:17:07,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:17:07,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:17:07,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:17:07,701 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-09-24 18:17:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:07,930 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-09-24 18:17:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:17:07,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 18:17:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:07,933 INFO L225 Difference]: With dead ends: 119 [2020-09-24 18:17:07,933 INFO L226 Difference]: Without dead ends: 95 [2020-09-24 18:17:07,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:17:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-24 18:17:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2020-09-24 18:17:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 18:17:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-24 18:17:07,956 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36 [2020-09-24 18:17:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:07,957 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-24 18:17:07,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:17:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-24 18:17:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 18:17:07,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:07,960 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:07,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:17:07,961 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times [2020-09-24 18:17:07,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:07,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762666838] [2020-09-24 18:17:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:08,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:09,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:09,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 18:17:09,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:17:09,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-09-24 18:17:09,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:09,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 18:17:09,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:17:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:17:09,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:09,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:09,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:09,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:09,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:09,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:17:09,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:09,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:09,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762666838] [2020-09-24 18:17:09,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:09,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:17:09,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135069852] [2020-09-24 18:17:09,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:17:09,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:17:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:17:09,352 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2020-09-24 18:17:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:09,991 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2020-09-24 18:17:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:17:09,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-24 18:17:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:09,994 INFO L225 Difference]: With dead ends: 143 [2020-09-24 18:17:09,994 INFO L226 Difference]: Without dead ends: 137 [2020-09-24 18:17:09,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:17:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-24 18:17:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2020-09-24 18:17:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 18:17:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-09-24 18:17:10,013 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 41 [2020-09-24 18:17:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:10,019 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-09-24 18:17:10,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:17:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-09-24 18:17:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 18:17:10,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:10,021 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:10,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:17:10,022 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:10,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:10,022 INFO L82 PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times [2020-09-24 18:17:10,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:10,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591611888] [2020-09-24 18:17:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:10,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:10,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:11,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:11,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 18:17:11,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:17:11,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-09-24 18:17:11,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 18:17:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:17:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:17:11,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:11,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:11,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:11,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:11,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:11,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:11,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:17:11,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:11,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:11,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:11,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:11,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591611888] [2020-09-24 18:17:11,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:11,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:17:11,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125447321] [2020-09-24 18:17:11,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:17:11,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:17:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:17:11,254 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 11 states. [2020-09-24 18:17:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:12,021 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-09-24 18:17:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 18:17:12,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-24 18:17:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:12,026 INFO L225 Difference]: With dead ends: 159 [2020-09-24 18:17:12,026 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 18:17:12,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-24 18:17:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 18:17:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 93. [2020-09-24 18:17:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 18:17:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-09-24 18:17:12,044 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 41 [2020-09-24 18:17:12,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:12,045 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-09-24 18:17:12,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:17:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-09-24 18:17:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 18:17:12,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:12,047 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:12,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:17:12,048 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2114514645, now seen corresponding path program 1 times [2020-09-24 18:17:12,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:12,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598947946] [2020-09-24 18:17:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:12,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:12,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:12,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:14,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:14,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:17:14,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:17:14,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2775 [2020-09-24 18:17:14,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:14,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:17:14,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:17:14,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:17:14,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:15,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:15,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:15,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:15,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:15,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:15,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:17:15,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:15,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:15,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:15,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598947946] [2020-09-24 18:17:15,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:15,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:17:15,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067990080] [2020-09-24 18:17:15,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:17:15,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:17:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:17:15,041 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 9 states. [2020-09-24 18:17:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:15,387 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2020-09-24 18:17:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:17:15,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-09-24 18:17:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:15,389 INFO L225 Difference]: With dead ends: 160 [2020-09-24 18:17:15,389 INFO L226 Difference]: Without dead ends: 145 [2020-09-24 18:17:15,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:17:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-24 18:17:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2020-09-24 18:17:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 18:17:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-09-24 18:17:15,398 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 47 [2020-09-24 18:17:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:15,398 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-09-24 18:17:15,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:17:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-09-24 18:17:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 18:17:15,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:15,399 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:15,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:17:15,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times [2020-09-24 18:17:15,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:15,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116655977] [2020-09-24 18:17:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:15,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:15,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:15,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:17:15,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:15,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-09-24 18:17:15,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:17:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 18:17:15,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:16,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:16,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:16,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:16,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:16,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:17:16,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:16,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:16,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116655977] [2020-09-24 18:17:16,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:16,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:17:16,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749314094] [2020-09-24 18:17:16,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:17:16,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:17:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:17:16,283 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 16 states. [2020-09-24 18:17:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:17,263 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2020-09-24 18:17:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 18:17:17,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-24 18:17:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:17,265 INFO L225 Difference]: With dead ends: 165 [2020-09-24 18:17:17,265 INFO L226 Difference]: Without dead ends: 159 [2020-09-24 18:17:17,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 18:17:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-24 18:17:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2020-09-24 18:17:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 18:17:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-09-24 18:17:17,279 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 47 [2020-09-24 18:17:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:17,279 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-09-24 18:17:17,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:17:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-09-24 18:17:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 18:17:17,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:17,281 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:17,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:17:17,281 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times [2020-09-24 18:17:17,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:17,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732115866] [2020-09-24 18:17:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:17,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:17,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:17:17,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:17,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-09-24 18:17:17,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:17:17,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:17,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 18:17:17,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:18,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:18,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:18,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:18,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:18,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:18,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:17:18,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:18,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:18,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:18,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732115866] [2020-09-24 18:17:18,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:18,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:17:18,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932661282] [2020-09-24 18:17:18,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:17:18,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:17:18,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:17:18,276 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states. [2020-09-24 18:17:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:19,477 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2020-09-24 18:17:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 18:17:19,478 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-24 18:17:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:19,480 INFO L225 Difference]: With dead ends: 179 [2020-09-24 18:17:19,480 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 18:17:19,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 18:17:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 18:17:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-09-24 18:17:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 18:17:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-09-24 18:17:19,489 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47 [2020-09-24 18:17:19,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:19,489 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-09-24 18:17:19,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:17:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-09-24 18:17:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 18:17:19,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:19,493 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:19,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 18:17:19,493 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times [2020-09-24 18:17:19,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:19,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209369875] [2020-09-24 18:17:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:19,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:19,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:20,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:20,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:17:20,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:17:20,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-09-24 18:17:20,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:20,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:17:20,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:17:20,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 18:17:20,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:20,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:20,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:20,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:20,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:20,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:20,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:17:20,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:20,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:20,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209369875] [2020-09-24 18:17:20,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:20,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:17:20,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647244422] [2020-09-24 18:17:20,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:17:20,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:20,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:17:20,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:17:20,742 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 9 states. [2020-09-24 18:17:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:21,108 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2020-09-24 18:17:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:17:21,109 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-09-24 18:17:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:21,110 INFO L225 Difference]: With dead ends: 171 [2020-09-24 18:17:21,110 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 18:17:21,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:17:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 18:17:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2020-09-24 18:17:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 18:17:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-24 18:17:21,118 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 47 [2020-09-24 18:17:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:21,119 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-24 18:17:21,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:17:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-24 18:17:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 18:17:21,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:21,120 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:17:21,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 18:17:21,120 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times [2020-09-24 18:17:21,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:21,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028640009] [2020-09-24 18:17:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:21,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:22,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:22,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 18:17:22,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:17:22,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-09-24 18:17:22,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 18:17:22,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:22,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:17:22,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:23,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:23,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:23,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:23,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:23,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:23,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:17:23,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:23,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:23,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:23,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:23,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:23,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028640009] [2020-09-24 18:17:23,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:23,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 18:17:23,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761554034] [2020-09-24 18:17:23,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 18:17:23,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 18:17:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:17:23,156 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 18 states. [2020-09-24 18:17:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:24,580 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2020-09-24 18:17:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 18:17:24,581 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-09-24 18:17:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:24,582 INFO L225 Difference]: With dead ends: 207 [2020-09-24 18:17:24,583 INFO L226 Difference]: Without dead ends: 201 [2020-09-24 18:17:24,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 18:17:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-24 18:17:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 127. [2020-09-24 18:17:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 18:17:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2020-09-24 18:17:24,591 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 52 [2020-09-24 18:17:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:24,591 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2020-09-24 18:17:24,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 18:17:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2020-09-24 18:17:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 18:17:24,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:24,592 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:24,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 18:17:24,593 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times [2020-09-24 18:17:24,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:24,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698281706] [2020-09-24 18:17:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:24,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:25,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:25,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:25,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 18:17:25,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:17:25,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1335 [2020-09-24 18:17:25,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:25,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 18:17:25,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:25,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:17:25,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:26,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:26,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:26,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:26,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:26,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:26,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:17:26,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:26,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:26,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:26,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:26,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:26,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698281706] [2020-09-24 18:17:26,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:26,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 18:17:26,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891386248] [2020-09-24 18:17:26,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 18:17:26,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:26,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 18:17:26,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:17:26,354 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand 18 states. [2020-09-24 18:17:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:27,845 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2020-09-24 18:17:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 18:17:27,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-09-24 18:17:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:27,847 INFO L225 Difference]: With dead ends: 233 [2020-09-24 18:17:27,847 INFO L226 Difference]: Without dead ends: 227 [2020-09-24 18:17:27,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 18:17:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-24 18:17:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 139. [2020-09-24 18:17:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-24 18:17:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2020-09-24 18:17:27,855 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 52 [2020-09-24 18:17:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:27,856 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2020-09-24 18:17:27,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 18:17:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2020-09-24 18:17:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 18:17:27,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:27,857 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:27,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 18:17:27,857 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times [2020-09-24 18:17:27,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:27,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237995722] [2020-09-24 18:17:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:28,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:28,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 18:17:28,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-09-24 18:17:28,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:17:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:28,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 18:17:28,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:28,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:28,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:28,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:28,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:28,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:28,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:17:28,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:28,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237995722] [2020-09-24 18:17:28,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:28,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:17:28,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561762551] [2020-09-24 18:17:28,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:17:28,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:17:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:17:28,591 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand 16 states. [2020-09-24 18:17:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:29,824 INFO L93 Difference]: Finished difference Result 205 states and 218 transitions. [2020-09-24 18:17:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 18:17:29,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 18:17:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:29,826 INFO L225 Difference]: With dead ends: 205 [2020-09-24 18:17:29,826 INFO L226 Difference]: Without dead ends: 190 [2020-09-24 18:17:29,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 18:17:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-24 18:17:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-24 18:17:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-24 18:17:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2020-09-24 18:17:29,835 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 53 [2020-09-24 18:17:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:29,836 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2020-09-24 18:17:29,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:17:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2020-09-24 18:17:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 18:17:29,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:29,837 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:29,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 18:17:29,838 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times [2020-09-24 18:17:29,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:29,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173112953] [2020-09-24 18:17:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:29,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:30,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:30,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 18:17:30,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:30,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-09-24 18:17:30,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:17:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 18:17:30,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:30,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:30,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:30,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:30,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:17:30,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:30,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:30,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:30,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:30,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173112953] [2020-09-24 18:17:30,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:30,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:17:30,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857898572] [2020-09-24 18:17:30,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:17:30,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:30,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:17:30,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:17:30,629 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 16 states. [2020-09-24 18:17:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:31,687 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-09-24 18:17:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 18:17:31,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 18:17:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:31,689 INFO L225 Difference]: With dead ends: 187 [2020-09-24 18:17:31,689 INFO L226 Difference]: Without dead ends: 157 [2020-09-24 18:17:31,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 18:17:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-24 18:17:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2020-09-24 18:17:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-24 18:17:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2020-09-24 18:17:31,702 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 53 [2020-09-24 18:17:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:31,703 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2020-09-24 18:17:31,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:17:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2020-09-24 18:17:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 18:17:31,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:31,705 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:31,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 18:17:31,705 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times [2020-09-24 18:17:31,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:31,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931694153] [2020-09-24 18:17:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:31,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:32,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:32,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 18:17:32,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:32,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-09-24 18:17:32,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:17:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:32,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 18:17:32,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:32,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:32,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:32,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:32,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:17:32,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:32,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:32,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:32,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931694153] [2020-09-24 18:17:32,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:32,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:17:32,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196558622] [2020-09-24 18:17:32,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:17:32,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:17:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:17:32,491 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand 16 states. [2020-09-24 18:17:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:33,656 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-09-24 18:17:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 18:17:33,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 18:17:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:33,658 INFO L225 Difference]: With dead ends: 169 [2020-09-24 18:17:33,659 INFO L226 Difference]: Without dead ends: 143 [2020-09-24 18:17:33,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 18:17:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-24 18:17:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2020-09-24 18:17:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-24 18:17:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2020-09-24 18:17:33,665 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 53 [2020-09-24 18:17:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:33,665 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2020-09-24 18:17:33,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:17:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2020-09-24 18:17:33,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 18:17:33,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:33,666 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:17:33,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 18:17:33,667 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:33,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1732440393, now seen corresponding path program 2 times [2020-09-24 18:17:33,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:33,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186584294] [2020-09-24 18:17:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:33,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:33,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:35,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:35,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 18:17:35,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:17:35,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1770 [2020-09-24 18:17:35,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 18:17:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 18:17:35,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:35,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:35,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:35,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:35,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:35,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:35,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:17:35,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:35,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:35,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:35,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:35,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186584294] [2020-09-24 18:17:35,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:35,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:17:35,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759729143] [2020-09-24 18:17:35,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:17:35,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:17:35,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:17:35,704 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand 16 states. [2020-09-24 18:17:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:36,575 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2020-09-24 18:17:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 18:17:36,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-09-24 18:17:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:36,578 INFO L225 Difference]: With dead ends: 194 [2020-09-24 18:17:36,578 INFO L226 Difference]: Without dead ends: 179 [2020-09-24 18:17:36,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 18:17:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-24 18:17:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 134. [2020-09-24 18:17:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 18:17:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2020-09-24 18:17:36,585 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 58 [2020-09-24 18:17:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:36,585 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2020-09-24 18:17:36,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:17:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2020-09-24 18:17:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 18:17:36,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:36,586 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:17:36,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 18:17:36,587 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times [2020-09-24 18:17:36,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:36,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356495716] [2020-09-24 18:17:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:36,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:37,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:37,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 18:17:37,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:37,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-09-24 18:17:37,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 18:17:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:17:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:17:37,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:38,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:38,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:38,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:38,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:38,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:17:38,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:38,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:17:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:17:38,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356495716] [2020-09-24 18:17:38,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:17:38,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 18:17:38,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729872503] [2020-09-24 18:17:38,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 18:17:38,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 18:17:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-09-24 18:17:38,360 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 22 states. [2020-09-24 18:17:39,027 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-09-24 18:17:39,615 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-09-24 18:17:39,779 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-09-24 18:17:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:40,784 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2020-09-24 18:17:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 18:17:40,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-24 18:17:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:40,787 INFO L225 Difference]: With dead ends: 207 [2020-09-24 18:17:40,787 INFO L226 Difference]: Without dead ends: 194 [2020-09-24 18:17:40,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 18:17:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-24 18:17:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 140. [2020-09-24 18:17:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-24 18:17:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2020-09-24 18:17:40,796 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 58 [2020-09-24 18:17:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:40,796 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2020-09-24 18:17:40,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 18:17:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2020-09-24 18:17:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 18:17:40,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:40,797 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:17:40,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 18:17:40,798 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times [2020-09-24 18:17:40,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:40,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954402554] [2020-09-24 18:17:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:17:40,819 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:17:40,819 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:17:40,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 18:17:40,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:17:40 BoogieIcfgContainer [2020-09-24 18:17:40,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:17:40,846 INFO L168 Benchmark]: Toolchain (without parser) took 37479.99 ms. Allocated memory was 138.9 MB in the beginning and 474.5 MB in the end (delta: 335.5 MB). Free memory was 101.2 MB in the beginning and 300.9 MB in the end (delta: -199.7 MB). Peak memory consumption was 135.8 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:40,847 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 18:17:40,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.73 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 167.6 MB in the end (delta: -67.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:40,848 INFO L168 Benchmark]: Boogie Preprocessor took 87.01 ms. Allocated memory is still 201.3 MB. Free memory was 167.6 MB in the beginning and 164.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:40,849 INFO L168 Benchmark]: RCFGBuilder took 797.29 ms. Allocated memory is still 201.3 MB. Free memory was 164.9 MB in the beginning and 116.7 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:40,850 INFO L168 Benchmark]: TraceAbstraction took 35845.87 ms. Allocated memory was 201.3 MB in the beginning and 474.5 MB in the end (delta: 273.2 MB). Free memory was 116.1 MB in the beginning and 300.9 MB in the end (delta: -184.8 MB). Peak memory consumption was 88.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:40,853 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 737.73 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 167.6 MB in the end (delta: -67.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.01 ms. Allocated memory is still 201.3 MB. Free memory was 167.6 MB in the beginning and 164.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 797.29 ms. Allocated memory is still 201.3 MB. Free memory was 164.9 MB in the beginning and 116.7 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 35845.87 ms. Allocated memory was 201.3 MB in the beginning and 474.5 MB in the end (delta: 273.2 MB). Free memory was 116.1 MB in the beginning and 300.9 MB in the end (delta: -184.8 MB). Peak memory consumption was 88.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 35.7s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1000 SDtfs, 3501 SDslu, 6941 SDs, 0 SdLazy, 5954 SolverSat, 542 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 444 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 11.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 825 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 19.6s InterpolantComputationTime, 831 NumberOfCodeBlocks, 831 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 756 ConstructedInterpolants, 0 QuantifiedInterpolants, 332968 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 28/107 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...