/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:44:22,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:44:22,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:44:22,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:44:22,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:44:22,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:44:22,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:44:22,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:44:22,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:44:22,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:44:22,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:44:22,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:44:22,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:44:22,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:44:22,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:44:22,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:44:22,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:44:22,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:44:22,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:44:22,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:44:22,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:44:22,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:44:22,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:44:22,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:44:22,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:44:22,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:44:22,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:44:22,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:44:22,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:44:22,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:44:22,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:44:22,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:44:22,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:44:22,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:44:22,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:44:22,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:44:22,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:44:22,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:44:22,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:44:22,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:44:22,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:44:22,552 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 [2020-10-12 15:44:22,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:44:22,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:44:22,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:44:22,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:44:22,577 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:44:22,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:44:22,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:44:22,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:44:22,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:44:22,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:44:22,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:44:22,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:44:22,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:44:22,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:44:22,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:44:22,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:44:22,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:44:22,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:44:22,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:44:22,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:44:22,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:44:22,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:44:22,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:44:22,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:44:22,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:44:22,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:44:22,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:44:22,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:44:22,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:44:22,582 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:44:22,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:44:22,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:44:22,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:44:22,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:44:22,948 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:44:22,948 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-12 15:44:23,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a1a3d52/0894b6e7c60f405c87da5a2c8cc25d8a/FLAGcf86b8f65 [2020-10-12 15:44:23,472 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:44:23,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-12 15:44:23,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a1a3d52/0894b6e7c60f405c87da5a2c8cc25d8a/FLAGcf86b8f65 [2020-10-12 15:44:23,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a1a3d52/0894b6e7c60f405c87da5a2c8cc25d8a [2020-10-12 15:44:23,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:44:23,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:44:23,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:44:23,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:44:23,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:44:23,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:44:23" (1/1) ... [2020-10-12 15:44:23,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a3fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:23, skipping insertion in model container [2020-10-12 15:44:23,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:44:23" (1/1) ... [2020-10-12 15:44:23,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:44:23,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:44:24,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:44:24,392 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:44:24,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:44:24,552 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:44:24,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24 WrapperNode [2020-10-12 15:44:24,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:44:24,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:44:24,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:44:24,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:44:24,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (1/1) ... [2020-10-12 15:44:24,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (1/1) ... [2020-10-12 15:44:24,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (1/1) ... [2020-10-12 15:44:24,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (1/1) ... [2020-10-12 15:44:24,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (1/1) ... [2020-10-12 15:44:24,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (1/1) ... [2020-10-12 15:44:24,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (1/1) ... [2020-10-12 15:44:24,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:44:24,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:44:24,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:44:24,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:44:24,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (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 [2020-10-12 15:44:24,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:44:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:44:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:44:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:44:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:44:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-10-12 15:44:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-10-12 15:44:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-10-12 15:44:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-10-12 15:44:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:44:24,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:44:24,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:44:24,748 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:44:24,748 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:44:24,748 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:44:24,748 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:44:24,748 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:44:24,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:44:24,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:44:24,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:44:24,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:44:24,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:44:24,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:44:24,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:44:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:44:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:44:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:44:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:44:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:44:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:44:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:44:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:44:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:44:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:44:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:44:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:44:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:44:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:44:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:44:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:44:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:44:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:44:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:44:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:44:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:44:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:44:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:44:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:44:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:44:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:44:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:44:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:44:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:44:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:44:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:44:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:44:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:44:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:44:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:44:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:44:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:44:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:44:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:44:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:44:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:44:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:44:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:44:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:44:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:44:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:44:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:44:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:44:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:44:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:44:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:44:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:44:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:44:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:44:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:44:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:44:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:44:24,761 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:44:24,761 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:44:24,762 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:44:24,762 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:44:24,762 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:44:24,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:44:24,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:44:24,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:44:24,762 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:44:24,763 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:44:24,763 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:44:24,763 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:44:24,763 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:44:24,763 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:44:24,763 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:44:24,763 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:44:24,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:44:24,764 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:44:24,764 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:44:24,764 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:44:24,764 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:44:24,764 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:44:24,764 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:44:24,765 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:44:24,765 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:44:24,765 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:44:24,765 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:44:24,765 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:44:24,765 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:44:24,765 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:44:24,766 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:44:24,766 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:44:24,766 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:44:24,766 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:44:24,766 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:44:24,767 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:44:24,767 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:44:24,768 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-10-12 15:44:24,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:44:24,768 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-10-12 15:44:24,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:44:24,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:44:24,768 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-10-12 15:44:24,768 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-10-12 15:44:24,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:44:24,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:44:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:44:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:44:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:44:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:44:25,166 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:44:25,473 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:44:25,473 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 15:44:25,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:44:25 BoogieIcfgContainer [2020-10-12 15:44:25,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:44:25,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:44:25,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:44:25,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:44:25,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:44:23" (1/3) ... [2020-10-12 15:44:25,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e4e110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:44:25, skipping insertion in model container [2020-10-12 15:44:25,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:24" (2/3) ... [2020-10-12 15:44:25,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e4e110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:44:25, skipping insertion in model container [2020-10-12 15:44:25,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:44:25" (3/3) ... [2020-10-12 15:44:25,487 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2020-10-12 15:44:25,498 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:44:25,506 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:44:25,521 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:44:25,549 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:44:25,549 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:44:25,550 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:44:25,550 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:44:25,550 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:44:25,550 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:44:25,551 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:44:25,551 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:44:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-12 15:44:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 15:44:25,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:25,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:25,580 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash 407034730, now seen corresponding path program 1 times [2020-10-12 15:44:25,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:25,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078721273] [2020-10-12 15:44:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:25,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:26,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:26,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:44:26,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:26,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-12 15:44:26,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:44:26,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:44:26,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:26,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:26,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:26,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:26,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:26,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:44:26,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:26,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:26,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:26,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:26,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:26,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078721273] [2020-10-12 15:44:26,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:26,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:44:26,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001313188] [2020-10-12 15:44:26,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:26,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:26,186 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2020-10-12 15:44:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:26,616 INFO L93 Difference]: Finished difference Result 119 states and 170 transitions. [2020-10-12 15:44:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:44:26,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-12 15:44:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:26,627 INFO L225 Difference]: With dead ends: 119 [2020-10-12 15:44:26,627 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 15:44:26,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:44:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 15:44:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-12 15:44:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 15:44:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-12 15:44:26,675 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2020-10-12 15:44:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:26,676 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-12 15:44:26,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-12 15:44:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:44:26,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:26,677 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:26,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:44:26,678 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:26,679 INFO L82 PathProgramCache]: Analyzing trace with hash -66753378, now seen corresponding path program 1 times [2020-10-12 15:44:26,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:26,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707756799] [2020-10-12 15:44:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:26,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:26,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:44:26,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:26,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-12 15:44:26,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:44:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:44:26,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:26,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:26,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:26,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:26,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:26,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:44:26,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:26,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:26,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:26,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707756799] [2020-10-12 15:44:26,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:26,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:44:26,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925551005] [2020-10-12 15:44:26,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:26,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:26,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:26,942 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-12 15:44:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:27,028 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-12 15:44:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:44:27,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-12 15:44:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:27,031 INFO L225 Difference]: With dead ends: 37 [2020-10-12 15:44:27,032 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 15:44:27,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:44:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 15:44:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-12 15:44:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 15:44:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-12 15:44:27,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-12 15:44:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:27,047 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-12 15:44:27,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-12 15:44:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:44:27,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:27,048 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:27,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:44:27,048 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1381959275, now seen corresponding path program 1 times [2020-10-12 15:44:27,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:27,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358180019] [2020-10-12 15:44:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:27,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:27,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:27,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:44:27,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:27,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-12 15:44:27,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:44:27,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:44:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:44:27,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:27,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:27,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:27,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:27,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:27,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:27,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:27,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:27,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:27,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:27,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:27,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358180019] [2020-10-12 15:44:27,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:27,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:44:27,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801938714] [2020-10-12 15:44:27,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:44:27,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:44:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:44:27,465 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-12 15:44:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:27,721 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-12 15:44:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:27,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-12 15:44:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:27,723 INFO L225 Difference]: With dead ends: 37 [2020-10-12 15:44:27,723 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 15:44:27,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 15:44:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-12 15:44:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 15:44:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 15:44:27,735 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-10-12 15:44:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:27,737 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 15:44:27,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:44:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 15:44:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:44:27,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:27,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:27,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:44:27,739 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:27,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1602875945, now seen corresponding path program 1 times [2020-10-12 15:44:27,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:27,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775390013] [2020-10-12 15:44:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:27,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:28,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:44:28,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:28,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-12 15:44:28,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:44:28,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:28,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:28,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:28,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:28,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:28,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:28,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:28,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775390013] [2020-10-12 15:44:28,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:28,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:28,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756076464] [2020-10-12 15:44:28,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:28,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:28,170 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-10-12 15:44:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:28,398 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-12 15:44:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:44:28,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-12 15:44:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:28,400 INFO L225 Difference]: With dead ends: 40 [2020-10-12 15:44:28,400 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 15:44:28,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 15:44:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-12 15:44:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 15:44:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 15:44:28,407 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-12 15:44:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:28,407 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 15:44:28,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 15:44:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:44:28,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:28,408 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:28,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:44:28,409 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1006799954, now seen corresponding path program 2 times [2020-10-12 15:44:28,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:28,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349067167] [2020-10-12 15:44:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:28,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:28,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:44:28,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:28,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-12 15:44:28,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:44:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:44:28,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:28,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:28,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:28,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:28,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:28,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:28,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:28,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:28,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:28,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:28,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349067167] [2020-10-12 15:44:28,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:28,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:28,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235274590] [2020-10-12 15:44:28,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:28,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:28,788 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-12 15:44:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:29,172 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-12 15:44:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:29,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-12 15:44:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:29,174 INFO L225 Difference]: With dead ends: 47 [2020-10-12 15:44:29,174 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 15:44:29,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 15:44:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2020-10-12 15:44:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 15:44:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-12 15:44:29,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2020-10-12 15:44:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:29,182 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-12 15:44:29,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-12 15:44:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:44:29,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:29,183 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:29,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:44:29,184 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash 173981419, now seen corresponding path program 2 times [2020-10-12 15:44:29,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:29,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175492531] [2020-10-12 15:44:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:29,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:29,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:44:29,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-12 15:44:29,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:44:29,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:29,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:29,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:29,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:29,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:44:29,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:29,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:29,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175492531] [2020-10-12 15:44:29,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:29,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:29,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780916967] [2020-10-12 15:44:29,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:29,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:29,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:29,807 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-10-12 15:44:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:30,091 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-12 15:44:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:44:30,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 15:44:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:30,093 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:44:30,094 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 15:44:30,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 15:44:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-12 15:44:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:44:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-12 15:44:30,103 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-10-12 15:44:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:30,103 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-12 15:44:30,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-12 15:44:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:44:30,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:30,104 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:30,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:44:30,105 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1825663632, now seen corresponding path program 3 times [2020-10-12 15:44:30,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:30,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006398992] [2020-10-12 15:44:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:30,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:44:30,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-12 15:44:30,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:44:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:44:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:30,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:30,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:30,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:30,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:30,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:30,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:30,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006398992] [2020-10-12 15:44:30,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:30,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:44:30,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236418022] [2020-10-12 15:44:30,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:44:30,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:30,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:44:30,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:44:30,617 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2020-10-12 15:44:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:31,025 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-12 15:44:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:31,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-12 15:44:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:31,026 INFO L225 Difference]: With dead ends: 44 [2020-10-12 15:44:31,027 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:44:31,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:44:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-12 15:44:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 15:44:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 15:44:31,037 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-12 15:44:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:31,038 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 15:44:31,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:44:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 15:44:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 15:44:31,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:31,040 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:31,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:44:31,041 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash -82655559, now seen corresponding path program 3 times [2020-10-12 15:44:31,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:31,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954560400] [2020-10-12 15:44:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:31,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:31,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:31,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:44:31,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:31,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-12 15:44:31,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:31,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:31,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:31,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:44:31,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:31,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:31,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:31,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:31,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:31,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:31,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:31,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:31,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:31,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954560400] [2020-10-12 15:44:31,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:31,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:31,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52422428] [2020-10-12 15:44:31,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:31,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:31,535 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-12 15:44:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:31,797 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-12 15:44:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:44:31,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-12 15:44:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:31,798 INFO L225 Difference]: With dead ends: 39 [2020-10-12 15:44:31,798 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 15:44:31,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:44:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 15:44:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-12 15:44:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 15:44:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 15:44:31,804 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-12 15:44:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:31,805 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 15:44:31,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 15:44:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:44:31,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:31,806 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:31,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:44:31,806 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:31,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1179253650, now seen corresponding path program 4 times [2020-10-12 15:44:31,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:31,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027966667] [2020-10-12 15:44:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:32,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:44:32,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:32,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-12 15:44:32,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:44:32,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:32,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:32,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:32,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:32,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:32,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:32,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:32,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:32,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:32,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027966667] [2020-10-12 15:44:32,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:32,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:32,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639469475] [2020-10-12 15:44:32,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:32,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:32,410 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-12 15:44:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:32,928 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-12 15:44:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:44:32,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-12 15:44:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:32,929 INFO L225 Difference]: With dead ends: 45 [2020-10-12 15:44:32,929 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 15:44:32,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:44:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 15:44:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-12 15:44:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 15:44:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 15:44:32,937 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-10-12 15:44:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:32,938 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 15:44:32,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 15:44:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:44:32,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:32,939 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:32,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:44:32,939 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:32,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1370635575, now seen corresponding path program 5 times [2020-10-12 15:44:32,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:32,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801904795] [2020-10-12 15:44:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:32,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:33,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:44:33,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 15:44:33,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:44:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:44:33,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:33,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:33,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:33,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:33,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:33,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:33,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:33,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:33,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:33,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801904795] [2020-10-12 15:44:33,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:33,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:44:33,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661235838] [2020-10-12 15:44:33,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:44:33,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:44:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:44:33,729 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-12 15:44:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:34,362 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-12 15:44:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:44:34,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 15:44:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:34,363 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:44:34,363 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:44:34,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:44:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:44:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-12 15:44:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:44:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-12 15:44:34,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 29 [2020-10-12 15:44:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:34,371 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-12 15:44:34,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:44:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-12 15:44:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:44:34,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:34,372 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:34,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:44:34,372 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1682132144, now seen corresponding path program 6 times [2020-10-12 15:44:34,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:34,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181971563] [2020-10-12 15:44:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:34,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:34,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:44:34,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:34,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-12 15:44:34,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:34,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:34,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:34,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:44:34,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:35,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:35,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:35,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:35,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:35,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:35,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:35,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:35,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:35,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181971563] [2020-10-12 15:44:35,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:35,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:35,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320873007] [2020-10-12 15:44:35,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:35,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:35,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:35,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:35,023 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-12 15:44:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:35,421 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-12 15:44:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:35,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-12 15:44:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:35,423 INFO L225 Difference]: With dead ends: 57 [2020-10-12 15:44:35,423 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 15:44:35,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 15:44:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-12 15:44:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:44:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 15:44:35,431 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-12 15:44:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:35,431 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 15:44:35,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 15:44:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:44:35,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:35,432 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:35,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:44:35,433 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash -345469767, now seen corresponding path program 7 times [2020-10-12 15:44:35,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:35,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238511520] [2020-10-12 15:44:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:35,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:44:35,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:35,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-12 15:44:35,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:44:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:44:35,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:36,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:36,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:36,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:36,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:36,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:36,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:36,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:36,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238511520] [2020-10-12 15:44:36,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:36,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:44:36,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635269509] [2020-10-12 15:44:36,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:44:36,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:44:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:36,535 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-12 15:44:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:37,099 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-12 15:44:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:44:37,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-12 15:44:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:37,100 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:44:37,101 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 15:44:37,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:44:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 15:44:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-12 15:44:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:44:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 15:44:37,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2020-10-12 15:44:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:37,116 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 15:44:37,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:44:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 15:44:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:44:37,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:37,117 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:37,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:44:37,118 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1392421246, now seen corresponding path program 8 times [2020-10-12 15:44:37,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:37,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487548382] [2020-10-12 15:44:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:37,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:37,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:37,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:44:37,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:37,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-12 15:44:37,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:44:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:44:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:37,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:37,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:37,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:37,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:37,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:37,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:37,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487548382] [2020-10-12 15:44:37,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:37,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:44:37,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973124806] [2020-10-12 15:44:37,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:44:37,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:44:37,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:37,988 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-12 15:44:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:38,656 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-12 15:44:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:44:38,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-12 15:44:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:38,657 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:44:38,657 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 15:44:38,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:44:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 15:44:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-12 15:44:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:44:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 15:44:38,664 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-12 15:44:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:38,664 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 15:44:38,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:44:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 15:44:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:44:38,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:38,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:38,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:44:38,666 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:38,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1143325495, now seen corresponding path program 9 times [2020-10-12 15:44:38,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:38,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933137252] [2020-10-12 15:44:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:39,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:44:39,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:39,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-12 15:44:39,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:44:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:44:39,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:39,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:39,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:39,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:39,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:39,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:39,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:39,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:39,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:39,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:39,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933137252] [2020-10-12 15:44:39,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:39,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:44:39,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389895216] [2020-10-12 15:44:39,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:44:39,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:44:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:39,737 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-12 15:44:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:40,585 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-12 15:44:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:44:40,586 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-12 15:44:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:40,587 INFO L225 Difference]: With dead ends: 54 [2020-10-12 15:44:40,587 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:44:40,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:44:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:44:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-12 15:44:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:44:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 15:44:40,623 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-12 15:44:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:40,624 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 15:44:40,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:44:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 15:44:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:44:40,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:40,625 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:40,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:44:40,626 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:40,626 INFO L82 PathProgramCache]: Analyzing trace with hash -822332832, now seen corresponding path program 10 times [2020-10-12 15:44:40,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:40,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543339413] [2020-10-12 15:44:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:40,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:41,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:41,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:44:41,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:41,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-12 15:44:41,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:44:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:44:41,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:41,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:41,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:41,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:41,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:41,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:41,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:41,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543339413] [2020-10-12 15:44:41,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:41,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:44:41,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722155519] [2020-10-12 15:44:41,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:44:41,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:41,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:44:41,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:44:41,699 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-10-12 15:44:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:42,217 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-12 15:44:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:44:42,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-12 15:44:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:42,218 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:44:42,218 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:44:42,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:44:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:44:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-12 15:44:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:44:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 15:44:42,225 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2020-10-12 15:44:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:42,225 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 15:44:42,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:44:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 15:44:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:44:42,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:42,226 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:42,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:44:42,227 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1714302279, now seen corresponding path program 11 times [2020-10-12 15:44:42,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:42,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521605818] [2020-10-12 15:44:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:42,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:42,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:42,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:44:42,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:42,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-12 15:44:42,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:42,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:44:42,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:42,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:44:42,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:43,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:43,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:43,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:43,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:43,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:43,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:43,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:43,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:43,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:43,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:43,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521605818] [2020-10-12 15:44:43,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:43,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:44:43,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427499920] [2020-10-12 15:44:43,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:44:43,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:44:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:43,171 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2020-10-12 15:44:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:43,762 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-12 15:44:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:44:43,763 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:44:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:43,764 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:44:43,764 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:44:43,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:44:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:44:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-12 15:44:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:44:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-12 15:44:43,773 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2020-10-12 15:44:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:43,774 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-12 15:44:43,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:44:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-12 15:44:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:44:43,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:43,776 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:43,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:44:43,776 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:43,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:43,776 INFO L82 PathProgramCache]: Analyzing trace with hash 380920258, now seen corresponding path program 12 times [2020-10-12 15:44:43,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:43,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246637941] [2020-10-12 15:44:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:44,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:44,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:44:44,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:44,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-12 15:44:44,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:44,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:44:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:44:44,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:45,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:45,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:45,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:45,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:45,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:45,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:45,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:45,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:45,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:45,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246637941] [2020-10-12 15:44:45,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:45,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:44:45,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239391399] [2020-10-12 15:44:45,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:44:45,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:44:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:44:45,332 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-10-12 15:44:45,922 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 15:44:46,226 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-12 15:44:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:46,619 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-12 15:44:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:46,620 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-12 15:44:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:46,621 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:44:46,621 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:44:46,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:44:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:44:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-12 15:44:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:44:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 15:44:46,628 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-12 15:44:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:46,628 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 15:44:46,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:44:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 15:44:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:44:46,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:46,629 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:46,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:44:46,629 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 696672032, now seen corresponding path program 13 times [2020-10-12 15:44:46,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:46,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86949281] [2020-10-12 15:44:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:47,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:47,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:44:47,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:47,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-12 15:44:47,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:47,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:44:47,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:47,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:44:47,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:48,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:48,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:48,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:48,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:48,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:48,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:48,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86949281] [2020-10-12 15:44:48,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:48,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:44:48,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208428950] [2020-10-12 15:44:48,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:44:48,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:44:48,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:48,510 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2020-10-12 15:44:49,211 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-12 15:44:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:49,750 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-12 15:44:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:44:49,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-12 15:44:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:49,752 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:44:49,752 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:44:49,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:44:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:44:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-12 15:44:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:44:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 15:44:49,760 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-12 15:44:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:49,760 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 15:44:49,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:44:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 15:44:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:44:49,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:49,761 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:49,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:44:49,762 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2106679867, now seen corresponding path program 14 times [2020-10-12 15:44:49,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:49,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688517739] [2020-10-12 15:44:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:49,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:50,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:44:50,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:50,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-12 15:44:50,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:50,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:44:50,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:50,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:44:50,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:51,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:51,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:51,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:51,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:51,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:51,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:51,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:51,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688517739] [2020-10-12 15:44:51,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:51,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:44:51,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976172520] [2020-10-12 15:44:51,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:44:51,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:51,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:44:51,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:44:51,911 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-12 15:44:52,714 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-12 15:44:53,006 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-12 15:44:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:53,584 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-12 15:44:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:44:53,585 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-12 15:44:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:53,586 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:44:53,586 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:44:53,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:44:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:44:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2020-10-12 15:44:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:44:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-12 15:44:53,593 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 43 [2020-10-12 15:44:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:53,594 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-12 15:44:53,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:44:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-12 15:44:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:44:53,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:53,595 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:53,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:44:53,595 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1279393026, now seen corresponding path program 15 times [2020-10-12 15:44:53,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:53,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281361187] [2020-10-12 15:44:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:53,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:54,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:54,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:44:54,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:54,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-12 15:44:54,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:54,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:44:54,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:54,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:44:54,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:55,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:55,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:55,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:55,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:55,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:55,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:55,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:55,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:55,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:55,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:55,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:55,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281361187] [2020-10-12 15:44:55,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:55,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:44:55,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89046191] [2020-10-12 15:44:55,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:44:55,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:44:55,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:55,272 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 19 states. [2020-10-12 15:44:55,897 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-12 15:44:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:56,447 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-12 15:44:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:44:56,447 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-12 15:44:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:56,448 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:44:56,448 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:44:56,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:44:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:44:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-12 15:44:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 15:44:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-12 15:44:56,459 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-12 15:44:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:56,460 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-12 15:44:56,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:44:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-12 15:44:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:44:56,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:56,460 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:56,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:44:56,461 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2042650631, now seen corresponding path program 16 times [2020-10-12 15:44:56,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:56,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467804030] [2020-10-12 15:44:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:56,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:57,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:57,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:44:57,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-12 15:44:57,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:44:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:44:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:44:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:57,976 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-12 15:44:58,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:58,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:58,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:58,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:58,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:58,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467804030] [2020-10-12 15:44:58,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:58,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:44:58,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806199288] [2020-10-12 15:44:58,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:44:58,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:44:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:44:58,480 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 21 states. [2020-10-12 15:44:59,086 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-12 15:44:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:59,547 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-12 15:44:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:44:59,548 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-12 15:44:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:59,549 INFO L225 Difference]: With dead ends: 68 [2020-10-12 15:44:59,549 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:44:59,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:44:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:44:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-10-12 15:44:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:44:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 15:44:59,563 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-10-12 15:44:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:59,563 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 15:44:59,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:44:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 15:44:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:44:59,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:59,564 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:59,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:44:59,565 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash 882343476, now seen corresponding path program 17 times [2020-10-12 15:44:59,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:59,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962935] [2020-10-12 15:44:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:59,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:00,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:00,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:45:00,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:00,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-12 15:45:00,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:00,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:45:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:45:00,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:01,416 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-12 15:45:01,798 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-12 15:45:02,196 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-12 15:45:02,353 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-12 15:45:02,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:02,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:02,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:02,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:02,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:02,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:02,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:02,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962935] [2020-10-12 15:45:02,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:02,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:45:02,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596839274] [2020-10-12 15:45:02,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:45:02,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:02,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:45:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:45:02,789 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-12 15:45:03,527 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-12 15:45:03,772 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-12 15:45:03,993 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 68 [2020-10-12 15:45:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:04,355 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-12 15:45:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:45:04,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-12 15:45:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:04,358 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:45:04,358 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:45:04,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:45:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:45:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-12 15:45:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:45:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 15:45:04,365 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 47 [2020-10-12 15:45:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:04,365 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 15:45:04,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:45:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 15:45:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:45:04,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:04,366 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:04,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:45:04,366 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1513160379, now seen corresponding path program 18 times [2020-10-12 15:45:04,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:04,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438861685] [2020-10-12 15:45:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:04,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:05,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:05,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:45:05,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1111 [2020-10-12 15:45:05,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:45:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:45:05,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:06,003 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-12 15:45:06,283 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-12 15:45:06,415 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-12 15:45:06,553 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-12 15:45:07,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:07,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:07,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:07,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:07,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438861685] [2020-10-12 15:45:07,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:07,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:45:07,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429564082] [2020-10-12 15:45:07,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:45:07,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:07,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:45:07,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:45:07,123 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-12 15:45:07,917 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:45:08,087 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 15:45:08,309 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-12 15:45:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:09,065 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-12 15:45:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:45:09,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-12 15:45:09,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:09,066 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:45:09,066 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 15:45:09,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:45:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 15:45:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-12 15:45:09,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:45:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 15:45:09,076 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-12 15:45:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:09,076 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 15:45:09,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:45:09,077 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 15:45:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:45:09,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:09,077 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:09,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:45:09,078 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash 699503982, now seen corresponding path program 19 times [2020-10-12 15:45:09,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:09,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086862398] [2020-10-12 15:45:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:10,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:10,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:45:10,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:10,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-12 15:45:10,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:10,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:45:10,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:10,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:45:10,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:10,510 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-12 15:45:10,688 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-12 15:45:10,897 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-12 15:45:11,090 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-12 15:45:11,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:11,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:11,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:11,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:11,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:11,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:11,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:11,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:11,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:11,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:11,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:11,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086862398] [2020-10-12 15:45:11,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:11,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:45:11,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434608212] [2020-10-12 15:45:11,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:45:11,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:11,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:45:11,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:45:11,475 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-12 15:45:12,275 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-12 15:45:12,660 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-10-12 15:45:13,025 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 88 [2020-10-12 15:45:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:13,371 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-12 15:45:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:45:13,371 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-12 15:45:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:13,372 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:45:13,372 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 15:45:13,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:45:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 15:45:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-10-12 15:45:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:45:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 15:45:13,382 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 50 [2020-10-12 15:45:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:13,382 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 15:45:13,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:45:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 15:45:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:45:13,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:13,383 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:13,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:45:13,383 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:13,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1411026041, now seen corresponding path program 20 times [2020-10-12 15:45:13,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:13,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119135584] [2020-10-12 15:45:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:13,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:14,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:45:14,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:14,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-12 15:45:14,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:14,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:45:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:45:14,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:14,788 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-12 15:45:15,011 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-12 15:45:15,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:15,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:15,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:15,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:15,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:15,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:15,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:15,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:15,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119135584] [2020-10-12 15:45:15,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:15,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:45:15,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673856103] [2020-10-12 15:45:15,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:45:15,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:15,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:45:15,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:45:15,855 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 22 states. [2020-10-12 15:45:16,284 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-12 15:45:16,611 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-12 15:45:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:17,275 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-12 15:45:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:17,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-12 15:45:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:17,276 INFO L225 Difference]: With dead ends: 81 [2020-10-12 15:45:17,276 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 15:45:17,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:45:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 15:45:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-12 15:45:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:45:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-12 15:45:17,284 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2020-10-12 15:45:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:17,284 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-12 15:45:17,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:45:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-12 15:45:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:45:17,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:17,285 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:17,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:45:17,285 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -253330444, now seen corresponding path program 21 times [2020-10-12 15:45:17,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:17,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960197217] [2020-10-12 15:45:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:17,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:18,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:18,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:45:18,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:18,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-12 15:45:18,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:18,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:45:18,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:18,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 15:45:18,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:18,967 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 15:45:19,284 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-12 15:45:19,430 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-12 15:45:19,711 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-12 15:45:19,892 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:45:20,148 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 15:45:20,413 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-12 15:45:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:20,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:20,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:20,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:20,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:20,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:20,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:20,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:21,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960197217] [2020-10-12 15:45:21,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:21,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:45:21,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599534033] [2020-10-12 15:45:21,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:45:21,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:21,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:45:21,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:45:21,003 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 24 states. [2020-10-12 15:45:21,800 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-12 15:45:22,220 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-12 15:45:22,406 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-12 15:45:22,818 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 94 [2020-10-12 15:45:23,033 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:45:23,529 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 96 [2020-10-12 15:45:23,961 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-12 15:45:24,137 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-12 15:45:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:24,742 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-12 15:45:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:45:24,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-12 15:45:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:24,747 INFO L225 Difference]: With dead ends: 81 [2020-10-12 15:45:24,747 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 15:45:24,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:45:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 15:45:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-10-12 15:45:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:45:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 15:45:24,755 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-12 15:45:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:24,756 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 15:45:24,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:45:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 15:45:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:45:24,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:24,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:24,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:45:24,757 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash -704856146, now seen corresponding path program 22 times [2020-10-12 15:45:24,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:24,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137984472] [2020-10-12 15:45:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:24,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:25,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:25,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 15:45:25,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:25,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-12 15:45:25,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:45:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 15:45:25,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:26,310 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 15:45:26,457 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-12 15:45:26,638 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-12 15:45:27,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:27,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:27,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:27,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:27,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:27,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:27,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:27,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:27,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:27,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137984472] [2020-10-12 15:45:27,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:27,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:45:27,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540793945] [2020-10-12 15:45:27,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:45:27,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:45:27,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:45:27,452 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-12 15:45:28,275 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:45:28,633 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:45:29,121 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2020-10-12 15:45:29,464 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-12 15:45:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:30,105 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-12 15:45:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:45:30,106 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-12 15:45:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:30,107 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:45:30,107 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 15:45:30,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:45:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 15:45:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-12 15:45:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 15:45:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 15:45:30,118 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2020-10-12 15:45:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:30,118 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 15:45:30,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:45:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 15:45:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:45:30,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:30,119 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:30,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:45:30,119 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash 163099821, now seen corresponding path program 23 times [2020-10-12 15:45:30,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:30,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860756669] [2020-10-12 15:45:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:31,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:31,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:45:31,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1088 [2020-10-12 15:45:31,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:45:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 15:45:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:31,899 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-12 15:45:32,172 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 15:45:32,509 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:45:32,772 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-12 15:45:33,101 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 15:45:33,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:33,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:33,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:33,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:33,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:33,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:33,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:33,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:33,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860756669] [2020-10-12 15:45:33,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:33,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:45:33,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566304120] [2020-10-12 15:45:33,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:45:33,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:45:33,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:45:33,676 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-12 15:45:34,719 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-10-12 15:45:35,160 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-10-12 15:45:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:36,012 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-12 15:45:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:45:36,012 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-12 15:45:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:36,014 INFO L225 Difference]: With dead ends: 104 [2020-10-12 15:45:36,014 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:45:36,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:45:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:45:36,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-10-12 15:45:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:45:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-12 15:45:36,023 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 57 [2020-10-12 15:45:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:36,024 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-12 15:45:36,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:45:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-12 15:45:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 15:45:36,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:36,025 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:36,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:45:36,025 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -269473356, now seen corresponding path program 24 times [2020-10-12 15:45:36,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:36,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575227238] [2020-10-12 15:45:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:36,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:36,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:36,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:45:36,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:36,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-12 15:45:36,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:45:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 15:45:36,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:37,487 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-12 15:45:37,730 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-12 15:45:37,949 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 15:45:38,219 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-12 15:45:38,497 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 15:45:38,641 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-12 15:45:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:39,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:39,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:39,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:39,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:39,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:39,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:39,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:39,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:39,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:39,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:39,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575227238] [2020-10-12 15:45:39,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:39,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:45:39,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869741066] [2020-10-12 15:45:39,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:45:39,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:39,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:45:39,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:45:39,320 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 25 states. [2020-10-12 15:45:39,953 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:45:40,316 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:45:40,751 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2020-10-12 15:45:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:41,582 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-12 15:45:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:45:41,583 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-12 15:45:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:41,584 INFO L225 Difference]: With dead ends: 97 [2020-10-12 15:45:41,584 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:45:41,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:45:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:45:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-12 15:45:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:45:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-12 15:45:41,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-12 15:45:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:41,596 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-12 15:45:41,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:45:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-12 15:45:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:45:41,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:41,597 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:41,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:45:41,598 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1303617621, now seen corresponding path program 25 times [2020-10-12 15:45:41,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:41,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796393896] [2020-10-12 15:45:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:42,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:42,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:45:42,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-12 15:45:42,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:45:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 15:45:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:43,720 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-12 15:45:44,090 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-12 15:45:44,236 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-12 15:45:44,464 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-10-12 15:45:44,694 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-12 15:45:44,918 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-12 15:45:45,102 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-12 15:45:45,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:45,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:45,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:45,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:45,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:45,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:45,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:45,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:45,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:45,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:45,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:45,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796393896] [2020-10-12 15:45:45,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:45,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:45:45,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974702190] [2020-10-12 15:45:45,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:45:45,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:45,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:45:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:45:45,654 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2020-10-12 15:45:46,450 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-12 15:45:46,738 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-12 15:45:47,089 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-10-12 15:45:47,453 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 98 [2020-10-12 15:45:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:48,501 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-12 15:45:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:45:48,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-12 15:45:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:48,503 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:45:48,503 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:45:48,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:45:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:45:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-12 15:45:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 15:45:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 15:45:48,513 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2020-10-12 15:45:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:48,514 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 15:45:48,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:45:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 15:45:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 15:45:48,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:48,514 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:48,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:45:48,515 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1998722842, now seen corresponding path program 26 times [2020-10-12 15:45:48,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:48,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13302247] [2020-10-12 15:45:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:48,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:50,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1461 [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 15:45:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:50,476 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-12 15:45:50,669 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-12 15:45:50,956 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-12 15:45:51,109 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-12 15:45:51,334 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-12 15:45:51,871 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-12 15:45:52,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:52,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:52,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:52,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:52,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:52,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:52,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:52,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:52,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:52,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:52,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13302247] [2020-10-12 15:45:52,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:52,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:45:52,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516573279] [2020-10-12 15:45:52,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:45:52,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:45:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:45:52,494 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-12 15:45:53,437 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-12 15:45:53,640 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:45:53,878 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:45:54,224 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2020-10-12 15:45:54,582 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 102 [2020-10-12 15:45:54,987 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 94 [2020-10-12 15:45:55,413 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 99 [2020-10-12 15:45:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:56,132 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-12 15:45:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:45:56,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-12 15:45:56,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:56,133 INFO L225 Difference]: With dead ends: 89 [2020-10-12 15:45:56,133 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 15:45:56,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:45:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 15:45:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-12 15:45:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 15:45:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 15:45:56,145 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-12 15:45:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:56,145 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 15:45:56,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:45:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 15:45:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:45:56,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:56,146 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:56,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:45:56,146 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash 983118765, now seen corresponding path program 27 times [2020-10-12 15:45:56,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:56,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206327378] [2020-10-12 15:45:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:56,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:58,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:45:58,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:58,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2105 [2020-10-12 15:45:58,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:58,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:45:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 15:45:58,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:58,987 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-12 15:45:59,274 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-12 15:45:59,415 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 15:45:59,649 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-12 15:45:59,817 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-12 15:46:00,174 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-10-12 15:46:00,381 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-10-12 15:46:00,593 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-12 15:46:00,785 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-12 15:46:01,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:01,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:01,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:01,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:01,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:01,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:01,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:01,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:01,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206327378] [2020-10-12 15:46:01,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:01,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:46:01,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418156662] [2020-10-12 15:46:01,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:46:01,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:46:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:46:01,493 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-12 15:46:02,772 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2020-10-12 15:46:03,023 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:46:03,396 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 105 [2020-10-12 15:46:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:04,610 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-12 15:46:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:46:04,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-12 15:46:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:04,612 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:46:04,612 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:46:04,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 15:46:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:46:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-12 15:46:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:46:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 15:46:04,629 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-12 15:46:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:04,629 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 15:46:04,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:46:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 15:46:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 15:46:04,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:04,630 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:04,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:46:04,630 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:04,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1479267708, now seen corresponding path program 28 times [2020-10-12 15:46:04,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:04,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228168166] [2020-10-12 15:46:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:06,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:46:06,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:06,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-12 15:46:06,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:46:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:46:06,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:07,717 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-12 15:46:07,962 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:46:08,275 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-12 15:46:08,531 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-12 15:46:08,750 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-12 15:46:08,991 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-12 15:46:09,149 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-12 15:46:09,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:09,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:09,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:09,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:09,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:46:09,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:09,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228168166] [2020-10-12 15:46:09,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:09,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:46:09,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797136157] [2020-10-12 15:46:09,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:46:09,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:46:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:46:09,831 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-10-12 15:46:10,659 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-12 15:46:10,957 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-12 15:46:11,286 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-12 15:46:11,719 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 97 [2020-10-12 15:46:12,133 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 109 [2020-10-12 15:46:12,595 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 113 [2020-10-12 15:46:13,190 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-12 15:46:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:13,811 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-12 15:46:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:46:13,811 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-12 15:46:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:13,812 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:46:13,812 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 15:46:13,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:46:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 15:46:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-10-12 15:46:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:46:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-12 15:46:13,827 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 64 [2020-10-12 15:46:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:13,827 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-12 15:46:13,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 15:46:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-12 15:46:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 15:46:13,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:13,828 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:13,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:46:13,828 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 713998677, now seen corresponding path program 29 times [2020-10-12 15:46:13,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:13,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527781454] [2020-10-12 15:46:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:14,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:15,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:15,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:46:15,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:15,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1555 [2020-10-12 15:46:15,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:15,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:46:15,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:15,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:46:15,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:16,273 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-12 15:46:16,599 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 15:46:16,744 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-12 15:46:16,961 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-12 15:46:17,132 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-12 15:46:17,323 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:46:18,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:18,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:18,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:18,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527781454] [2020-10-12 15:46:18,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:18,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:46:18,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487179989] [2020-10-12 15:46:18,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:46:18,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:18,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:46:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:46:18,335 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 28 states. [2020-10-12 15:46:18,859 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-12 15:46:19,239 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:46:19,696 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-12 15:46:19,912 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:46:20,258 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-12 15:46:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:21,375 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-12 15:46:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:46:21,375 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-12 15:46:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:21,376 INFO L225 Difference]: With dead ends: 107 [2020-10-12 15:46:21,376 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:46:21,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:46:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:46:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-12 15:46:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:46:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-12 15:46:21,388 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-10-12 15:46:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:21,388 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-12 15:46:21,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:46:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-12 15:46:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 15:46:21,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:21,389 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:21,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:46:21,390 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:21,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273242, now seen corresponding path program 30 times [2020-10-12 15:46:21,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:21,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676060300] [2020-10-12 15:46:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:21,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:23,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:46:23,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:23,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1851 [2020-10-12 15:46:23,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 15:46:23,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:23,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 15:46:23,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:23,810 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-12 15:46:24,053 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 15:46:24,296 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-12 15:46:24,619 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 15:46:24,780 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:46:25,033 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2020-10-12 15:46:25,222 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 15:46:25,497 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2020-10-12 15:46:25,695 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 15:46:25,919 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 15:46:26,130 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-12 15:46:27,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:27,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:27,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:27,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:27,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:46:27,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:27,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676060300] [2020-10-12 15:46:27,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:27,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 15:46:27,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032149202] [2020-10-12 15:46:27,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 15:46:27,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 15:46:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:46:27,077 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-12 15:46:28,056 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-12 15:46:28,545 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-12 15:46:28,771 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:46:29,154 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-12 15:46:29,393 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 15:46:29,801 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 113 [2020-10-12 15:46:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:31,088 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-12 15:46:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:46:31,088 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-12 15:46:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:31,090 INFO L225 Difference]: With dead ends: 98 [2020-10-12 15:46:31,090 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 15:46:31,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:46:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 15:46:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-12 15:46:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:46:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 15:46:31,107 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-12 15:46:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:31,107 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 15:46:31,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 15:46:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 15:46:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 15:46:31,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:31,108 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:31,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:46:31,108 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1403461411, now seen corresponding path program 31 times [2020-10-12 15:46:31,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:31,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306698304] [2020-10-12 15:46:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:31,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:32,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:32,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 15:46:32,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:32,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1712 [2020-10-12 15:46:32,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:32,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:46:32,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:32,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 15:46:32,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:33,570 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-12 15:46:34,051 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 15:46:34,401 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-12 15:46:34,584 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-12 15:46:34,876 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-10-12 15:46:35,107 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-10-12 15:46:35,340 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 15:46:35,522 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-12 15:46:36,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:36,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:36,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:36,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:36,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:36,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:36,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:36,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:36,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 2 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:36,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306698304] [2020-10-12 15:46:36,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:36,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:46:36,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134404052] [2020-10-12 15:46:36,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:46:36,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:36,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:46:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:36,300 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-12 15:46:37,797 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 91 [2020-10-12 15:46:38,039 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-12 15:46:38,481 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 119 [2020-10-12 15:46:39,045 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 125 [2020-10-12 15:46:39,652 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 127 [2020-10-12 15:46:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:40,527 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-12 15:46:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:46:40,527 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-12 15:46:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:40,529 INFO L225 Difference]: With dead ends: 99 [2020-10-12 15:46:40,529 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 15:46:40,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:46:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 15:46:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-12 15:46:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:46:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 15:46:40,546 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2020-10-12 15:46:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:40,546 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 15:46:40,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:46:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 15:46:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:46:40,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:40,547 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:40,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:46:40,547 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:40,548 INFO L82 PathProgramCache]: Analyzing trace with hash 878591292, now seen corresponding path program 32 times [2020-10-12 15:46:40,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:40,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335118836] [2020-10-12 15:46:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:40,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:42,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:46:42,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:42,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-12 15:46:42,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:42,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:46:42,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:42,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 15:46:42,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:43,025 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-12 15:46:43,272 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-12 15:46:43,432 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-12 15:46:43,735 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-12 15:46:43,953 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-12 15:46:44,326 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-12 15:46:44,521 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 15:46:45,016 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2020-10-12 15:46:45,268 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 15:46:45,807 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-12 15:46:46,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:46,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:46,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:46,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:46,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:46,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:46,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:47,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335118836] [2020-10-12 15:46:47,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:47,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:46:47,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728577507] [2020-10-12 15:46:47,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:46:47,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:47,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:46:47,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:47,027 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-12 15:46:47,768 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-12 15:46:48,262 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:46:48,545 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-12 15:46:49,027 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 114 [2020-10-12 15:46:49,373 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-12 15:46:50,094 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 149 [2020-10-12 15:46:50,584 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2020-10-12 15:46:51,780 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 183 [2020-10-12 15:46:52,373 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 132 [2020-10-12 15:46:54,677 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 233 DAG size of output: 212 [2020-10-12 15:46:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:56,668 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-12 15:46:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:46:56,669 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-12 15:46:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:56,670 INFO L225 Difference]: With dead ends: 104 [2020-10-12 15:46:56,670 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:46:56,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=202, Invalid=2878, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 15:46:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:46:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-12 15:46:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 15:46:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-12 15:46:56,690 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2020-10-12 15:46:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:56,690 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-12 15:46:56,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:46:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-12 15:46:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 15:46:56,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:56,692 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:56,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:46:56,692 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash -982869473, now seen corresponding path program 33 times [2020-10-12 15:46:56,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:56,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791900710] [2020-10-12 15:46:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:56,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:58,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 15:46:58,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:58,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-10-12 15:46:58,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 15:46:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 15:46:58,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:59,680 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-12 15:47:00,006 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-12 15:47:00,371 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-12 15:47:00,564 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-12 15:47:00,863 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-10-12 15:47:01,136 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-12 15:47:01,504 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-12 15:47:01,805 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-12 15:47:02,080 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-12 15:47:02,309 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-12 15:47:03,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:03,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:03,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:03,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:03,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:03,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:03,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:03,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791900710] [2020-10-12 15:47:03,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:03,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:47:03,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866388833] [2020-10-12 15:47:03,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:47:03,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:47:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:47:03,161 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-12 15:47:04,565 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-12 15:47:04,888 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-12 15:47:05,478 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 110 [2020-10-12 15:47:05,971 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 108 [2020-10-12 15:47:06,484 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 111 [2020-10-12 15:47:07,183 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 15:47:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:08,040 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-10-12 15:47:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:47:08,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-12 15:47:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:08,043 INFO L225 Difference]: With dead ends: 130 [2020-10-12 15:47:08,043 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 15:47:08,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=221, Invalid=2535, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 15:47:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 15:47:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2020-10-12 15:47:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 15:47:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-12 15:47:08,065 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 71 [2020-10-12 15:47:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:08,066 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-12 15:47:08,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:47:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-12 15:47:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 15:47:08,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:08,067 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:08,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:47:08,067 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash 587340134, now seen corresponding path program 34 times [2020-10-12 15:47:08,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:08,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048281133] [2020-10-12 15:47:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:09,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:09,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 15:47:09,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:09,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1740 [2020-10-12 15:47:09,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:47:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 15:47:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:10,665 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-12 15:47:10,915 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-12 15:47:11,123 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-12 15:47:11,532 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-10-12 15:47:11,715 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-12 15:47:12,111 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-10-12 15:47:12,322 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-12 15:47:12,574 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-12 15:47:12,828 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-12 15:47:13,005 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-12 15:47:14,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:14,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:14,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:14,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:14,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:14,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:14,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:14,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:14,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048281133] [2020-10-12 15:47:14,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:14,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:47:14,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479539978] [2020-10-12 15:47:14,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:47:14,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:14,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:47:14,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:47:14,160 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2020-10-12 15:47:14,975 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-12 15:47:15,219 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:47:15,523 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-12 15:47:15,777 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:47:16,123 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-12 15:47:16,406 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 15:47:16,867 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2020-10-12 15:47:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:18,365 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-12 15:47:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:47:18,365 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-12 15:47:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:18,366 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:47:18,366 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 15:47:18,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=154, Invalid=2198, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:47:18,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 15:47:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-12 15:47:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:47:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-12 15:47:18,388 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-12 15:47:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:18,389 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-12 15:47:18,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:47:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-12 15:47:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 15:47:18,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:18,393 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:18,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:47:18,393 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:18,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1867551325, now seen corresponding path program 35 times [2020-10-12 15:47:18,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:18,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614550083] [2020-10-12 15:47:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:18,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:20,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 15:47:20,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:20,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2329 [2020-10-12 15:47:20,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:20,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 15:47:20,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:20,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 15:47:20,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:21,497 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 15:47:21,811 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 15:47:22,054 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-12 15:47:22,217 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-12 15:47:22,520 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-12 15:47:22,727 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-12 15:47:23,171 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2020-10-12 15:47:23,411 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-12 15:47:23,755 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2020-10-12 15:47:24,031 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-10-12 15:47:24,333 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-12 15:47:24,638 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-10-12 15:47:25,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:25,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:25,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:25,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:25,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:25,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:25,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:25,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:25,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:25,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:25,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614550083] [2020-10-12 15:47:25,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:25,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:47:25,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103161890] [2020-10-12 15:47:25,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:47:25,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:47:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:47:25,959 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 33 states. [2020-10-12 15:47:27,377 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-12 15:47:27,619 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:27,958 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-12 15:47:28,216 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:47:28,606 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-12 15:47:28,902 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 15:47:29,449 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 121 [2020-10-12 15:47:29,771 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-12 15:47:30,321 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 123 [2020-10-12 15:47:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:32,100 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-12 15:47:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:47:32,102 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-12 15:47:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:32,103 INFO L225 Difference]: With dead ends: 108 [2020-10-12 15:47:32,103 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:47:32,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=223, Invalid=3083, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 15:47:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:47:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2020-10-12 15:47:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 15:47:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-12 15:47:32,127 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2020-10-12 15:47:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:32,127 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-12 15:47:32,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 15:47:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-12 15:47:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 15:47:32,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:32,128 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:32,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:47:32,128 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:32,128 INFO L82 PathProgramCache]: Analyzing trace with hash -213944680, now seen corresponding path program 36 times [2020-10-12 15:47:32,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:32,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352622004] [2020-10-12 15:47:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:32,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:34,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2186 [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 15:47:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:35,282 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 15:47:35,545 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-12 15:47:35,696 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-12 15:47:35,968 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 15:47:36,355 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-12 15:47:36,709 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 15:47:37,239 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-10-12 15:47:37,480 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-12 15:47:37,735 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:47:37,917 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 15:47:39,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:39,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:39,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352622004] [2020-10-12 15:47:39,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:39,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 15:47:39,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531108684] [2020-10-12 15:47:39,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 15:47:39,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 15:47:39,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:47:39,264 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-12 15:47:40,093 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-12 15:47:40,600 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-12 15:47:41,112 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-12 15:47:41,348 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:41,734 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-12 15:47:42,002 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:47:42,357 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-12 15:47:42,659 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-12 15:47:43,104 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-12 15:47:43,416 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-12 15:47:44,010 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 134 [2020-10-12 15:47:44,603 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 130 [2020-10-12 15:47:45,325 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 144 [2020-10-12 15:47:46,098 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-10-12 15:47:46,941 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 129 [2020-10-12 15:47:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:48,057 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-12 15:47:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 15:47:48,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-12 15:47:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:48,059 INFO L225 Difference]: With dead ends: 111 [2020-10-12 15:47:48,060 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 15:47:48,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=257, Invalid=3525, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 15:47:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 15:47:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2020-10-12 15:47:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 15:47:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-12 15:47:48,084 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 75 [2020-10-12 15:47:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:48,084 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-12 15:47:48,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 15:47:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-12 15:47:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 15:47:48,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:48,085 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:48,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:47:48,086 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash 789691295, now seen corresponding path program 37 times [2020-10-12 15:47:48,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:48,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905058176] [2020-10-12 15:47:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:48,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:50,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:50,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 15:47:50,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:50,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2602 [2020-10-12 15:47:50,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 15:47:50,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:50,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 15:47:50,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:51,432 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-12 15:47:51,623 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 15:47:52,037 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-12 15:47:52,193 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 15:47:52,428 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-12 15:47:52,613 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-12 15:47:52,926 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-12 15:47:53,146 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-12 15:47:53,485 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2020-10-12 15:47:53,751 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-12 15:47:54,011 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-12 15:47:54,250 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-12 15:47:55,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:55,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:55,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:55,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:55,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:55,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:55,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:55,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:55,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905058176] [2020-10-12 15:47:55,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:55,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 15:47:55,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185933605] [2020-10-12 15:47:55,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 15:47:55,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:55,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 15:47:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:47:55,797 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-12 15:47:57,381 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 90 [2020-10-12 15:47:57,654 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:47:58,047 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-12 15:47:58,345 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 15:47:58,794 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-12 15:47:59,127 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-12 15:47:59,685 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 126 [2020-10-12 15:48:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:01,611 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-12 15:48:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 15:48:01,612 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-12 15:48:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:01,613 INFO L225 Difference]: With dead ends: 114 [2020-10-12 15:48:01,614 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 15:48:01,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 15:48:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 15:48:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2020-10-12 15:48:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 15:48:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-12 15:48:01,639 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2020-10-12 15:48:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:01,639 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-12 15:48:01,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 15:48:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-12 15:48:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 15:48:01,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:01,640 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:01,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:48:01,641 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash 110367370, now seen corresponding path program 38 times [2020-10-12 15:48:01,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:01,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473977836] [2020-10-12 15:48:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3844 [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:05,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 15:48:05,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:06,506 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-12 15:48:06,811 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-12 15:48:06,943 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-12 15:48:07,202 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-12 15:48:07,373 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-12 15:48:07,680 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-12 15:48:07,926 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-12 15:48:08,326 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-12 15:48:08,650 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-12 15:48:09,144 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-10-12 15:48:09,478 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-10-12 15:48:10,279 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-10-12 15:48:10,588 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-12 15:48:10,893 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-12 15:48:11,167 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-12 15:48:12,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:12,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:12,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:12,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:12,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:12,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:12,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473977836] [2020-10-12 15:48:12,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:12,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 15:48:12,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917469912] [2020-10-12 15:48:12,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 15:48:12,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 15:48:12,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:48:12,655 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 35 states. [2020-10-12 15:48:13,415 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 15:48:13,763 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64