/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=NARROWEST --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 [2020-10-13 10:31:21,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:31:21,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:31:21,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:31:21,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:31:21,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:31:21,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:31:21,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:31:21,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:31:21,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:31:21,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:31:21,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:31:21,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:31:21,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:31:21,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:31:21,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:31:21,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:31:21,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:31:21,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:31:21,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:31:21,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:31:21,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:31:21,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:31:21,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:31:21,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:31:21,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:31:21,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:31:21,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:31:21,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:31:21,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:31:21,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:31:21,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:31:21,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:31:21,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:31:21,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:31:21,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:31:21,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:31:21,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:31:21,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:31:21,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:31:21,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:31:21,806 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 [2020-10-13 10:31:21,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:31:21,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:31:21,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:31:21,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:31:21,847 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:31:21,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:31:21,847 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:31:21,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:31:21,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:31:21,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:31:21,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:31:21,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:31:21,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:31:21,849 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:31:21,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:31:21,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:31:21,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:31:21,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:31:21,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:31:21,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:31:21,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:31:21,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:31:21,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:31:21,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:31:21,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:31:21,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:31:21,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:31:21,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:31:21,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:31:21,852 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:31:22,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:31:22,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:31:22,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:31:22,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:31:22,147 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:31:22,148 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-13 10:31:22,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1eddbcc07/9144ee6e95ab4ec3bc9f6ad02e94f53b/FLAGf29e1c364 [2020-10-13 10:31:22,686 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:31:22,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-13 10:31:22,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1eddbcc07/9144ee6e95ab4ec3bc9f6ad02e94f53b/FLAGf29e1c364 [2020-10-13 10:31:22,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1eddbcc07/9144ee6e95ab4ec3bc9f6ad02e94f53b [2020-10-13 10:31:22,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:31:22,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:31:22,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:31:22,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:31:22,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:31:22,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:31:22" (1/1) ... [2020-10-13 10:31:22,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ccefb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:22, skipping insertion in model container [2020-10-13 10:31:22,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:31:22" (1/1) ... [2020-10-13 10:31:22,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:31:23,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:31:23,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:31:23,484 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:31:23,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:31:23,597 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:31:23,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23 WrapperNode [2020-10-13 10:31:23,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:31:23,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:31:23,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:31:23,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:31:23,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (1/1) ... [2020-10-13 10:31:23,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (1/1) ... [2020-10-13 10:31:23,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (1/1) ... [2020-10-13 10:31:23,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (1/1) ... [2020-10-13 10:31:23,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (1/1) ... [2020-10-13 10:31:23,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (1/1) ... [2020-10-13 10:31:23,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (1/1) ... [2020-10-13 10:31:23,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:31:23,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:31:23,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:31:23,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:31:23,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (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 [2020-10-13 10:31:23,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:31:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:31:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:31:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:31:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:31:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-10-13 10:31:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-10-13 10:31:23,737 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-10-13 10:31:23,737 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-10-13 10:31:23,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:31:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:31:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:31:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:31:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:31:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:31:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:31:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:31:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:31:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:31:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:31:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:31:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:31:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:31:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:31:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:31:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:31:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:31:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:31:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:31:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:31:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:31:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:31:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:31:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:31:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:31:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:31:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:31:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:31:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:31:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:31:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:31:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:31:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:31:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:31:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:31:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:31:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:31:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:31:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:31:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:31:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:31:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:31:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:31:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:31:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:31:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:31:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:31:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:31:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:31:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:31:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:31:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:31:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:31:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:31:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:31:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:31:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:31:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:31:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:31:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:31:23,746 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:31:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:31:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:31:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:31:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:31:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:31:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:31:23,747 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:31:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:31:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:31:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:31:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:31:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:31:23,748 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:31:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:31:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:31:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:31:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:31:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:31:23,749 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:31:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:31:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:31:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:31:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:31:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:31:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:31:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:31:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:31:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:31:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:31:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:31:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:31:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:31:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:31:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:31:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:31:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:31:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:31:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:31:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:31:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:31:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-10-13 10:31:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:31:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-10-13 10:31:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:31:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:31:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-10-13 10:31:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-10-13 10:31:23,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:31:23,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:31:23,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:31:23,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:31:23,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:31:23,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:31:24,091 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:31:24,417 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:31:24,417 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 10:31:24,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:31:24 BoogieIcfgContainer [2020-10-13 10:31:24,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:31:24,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:31:24,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:31:24,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:31:24,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:31:22" (1/3) ... [2020-10-13 10:31:24,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5d3226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:31:24, skipping insertion in model container [2020-10-13 10:31:24,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:23" (2/3) ... [2020-10-13 10:31:24,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5d3226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:31:24, skipping insertion in model container [2020-10-13 10:31:24,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:31:24" (3/3) ... [2020-10-13 10:31:24,430 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2020-10-13 10:31:24,440 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:31:24,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:31:24,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:31:24,485 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:31:24,486 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:31:24,486 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:31:24,486 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:31:24,486 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:31:24,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:31:24,487 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:31:24,487 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:31:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-13 10:31:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:31:24,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:24,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:24,513 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash 407034730, now seen corresponding path program 1 times [2020-10-13 10:31:24,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:24,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121580177] [2020-10-13 10:31:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:24,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:24,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:24,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:31:24,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:31:24,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-13 10:31:24,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:24,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:24,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:31:24,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:24,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:31:24,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:24,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:24,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:24,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:24,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:24,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:31:24,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:24,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:24,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:24,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:24,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:24,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121580177] [2020-10-13 10:31:24,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:24,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:31:24,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103418835] [2020-10-13 10:31:25,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:31:25,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:25,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:31:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:31:25,019 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2020-10-13 10:31:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:25,206 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2020-10-13 10:31:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:31:25,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:31:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:25,216 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:31:25,216 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:31:25,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:31:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:31:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 10:31:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:31:25,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 10:31:25,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-13 10:31:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:25,253 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 10:31:25,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:31:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 10:31:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:31:25,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:25,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:25,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:31:25,255 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash -709462780, now seen corresponding path program 1 times [2020-10-13 10:31:25,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:25,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315066994] [2020-10-13 10:31:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:25,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:31:25,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 10:31:25,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:31:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:31:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:31:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:25,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:25,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:25,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:25,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315066994] [2020-10-13 10:31:25,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:31:25,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:31:25,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800273884] [2020-10-13 10:31:25,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:31:25,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:31:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:31:25,397 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-13 10:31:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:25,488 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-13 10:31:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:31:25,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-13 10:31:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:25,489 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:31:25,490 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:31:25,491 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 [2020-10-13 10:31:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:31:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-13 10:31:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:31:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 10:31:25,497 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-10-13 10:31:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:25,497 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 10:31:25,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:31:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 10:31:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:31:25,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:25,498 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:25,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:31:25,499 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:25,499 INFO L82 PathProgramCache]: Analyzing trace with hash -66753378, now seen corresponding path program 1 times [2020-10-13 10:31:25,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:25,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650490779] [2020-10-13 10:31:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:31:25,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 10:31:25,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:31:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:31:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:31:25,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:25,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:25,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:25,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:25,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:25,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:25,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650490779] [2020-10-13 10:31:25,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:25,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:31:25,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038328] [2020-10-13 10:31:25,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:31:25,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:31:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:31:25,639 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 10:31:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:25,716 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-13 10:31:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:31:25,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 10:31:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:25,717 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:31:25,717 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:31:25,718 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 [2020-10-13 10:31:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:31:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-13 10:31:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:31:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 10:31:25,723 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-13 10:31:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:25,723 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 10:31:25,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:31:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 10:31:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:31:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:25,724 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:25,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:31:25,725 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1381959275, now seen corresponding path program 1 times [2020-10-13 10:31:25,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:25,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059130892] [2020-10-13 10:31:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:25,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:31:25,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-13 10:31:25,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:31:25,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:25,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:31:25,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:25,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:25,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:25,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:25,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:25,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:31:25,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:25,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059130892] [2020-10-13 10:31:25,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:25,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:31:25,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477730555] [2020-10-13 10:31:25,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:31:25,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:31:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:31:25,964 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-13 10:31:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:26,145 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-13 10:31:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:31:26,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-13 10:31:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:26,146 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:31:26,147 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:31:26,147 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 [2020-10-13 10:31:26,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:31:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-13 10:31:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:31:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 10:31:26,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-10-13 10:31:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:26,153 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 10:31:26,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:31:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 10:31:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:31:26,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:26,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:26,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:31:26,155 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1602875945, now seen corresponding path program 1 times [2020-10-13 10:31:26,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:26,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726264973] [2020-10-13 10:31:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:26,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:26,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:26,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:31:26,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:26,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-13 10:31:26,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:31:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:31:26,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:26,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:26,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:26,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:26,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:26,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:26,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:26,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:26,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:26,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726264973] [2020-10-13 10:31:26,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:26,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:31:26,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351822882] [2020-10-13 10:31:26,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:31:26,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:31:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:31:26,448 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-10-13 10:31:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:26,716 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 10:31:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:31:26,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-13 10:31:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:26,717 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:31:26,717 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:31:26,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:31:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-13 10:31:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:31:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 10:31:26,724 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-13 10:31:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:26,724 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 10:31:26,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:31:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 10:31:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:31:26,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:26,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:26,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:31:26,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1006799954, now seen corresponding path program 2 times [2020-10-13 10:31:26,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:26,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197560374] [2020-10-13 10:31:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:26,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:26,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:26,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:31:26,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-13 10:31:26,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:31:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:31:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:26,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:26,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:26,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:26,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:26,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:26,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:26,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:26,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:26,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:27,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197560374] [2020-10-13 10:31:27,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:27,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:31:27,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928709607] [2020-10-13 10:31:27,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:31:27,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:27,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:31:27,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:31:27,002 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-13 10:31:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:27,308 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-13 10:31:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:31:27,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-13 10:31:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:27,311 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:31:27,311 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:31:27,311 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 [2020-10-13 10:31:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:31:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2020-10-13 10:31:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:31:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 10:31:27,326 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2020-10-13 10:31:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:27,327 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 10:31:27,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:31:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 10:31:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:31:27,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:27,329 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:27,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:31:27,329 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:27,330 INFO L82 PathProgramCache]: Analyzing trace with hash 173981419, now seen corresponding path program 2 times [2020-10-13 10:31:27,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:27,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35120071] [2020-10-13 10:31:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:27,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:27,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:31:27,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:27,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 10:31:27,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:27,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:31:27,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:27,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:31:27,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:27,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:27,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:27,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:27,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:27,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:31:27,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:27,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:27,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35120071] [2020-10-13 10:31:27,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:27,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:31:27,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537615790] [2020-10-13 10:31:27,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:31:27,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:31:27,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:31:27,750 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-10-13 10:31:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:27,975 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-13 10:31:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:31:27,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:31:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:27,976 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:31:27,976 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:31:27,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:31:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-13 10:31:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:31:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 10:31:27,981 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-10-13 10:31:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:27,982 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 10:31:27,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:31:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 10:31:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:31:27,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:27,983 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:27,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:31:27,983 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1825663632, now seen corresponding path program 3 times [2020-10-13 10:31:27,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:27,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086520596] [2020-10-13 10:31:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:28,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:28,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:28,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:31:28,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-13 10:31:28,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:31:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:28,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:31:28,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:28,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:28,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:28,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:28,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:28,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:28,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:28,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:28,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:28,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086520596] [2020-10-13 10:31:28,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:28,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:31:28,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56954744] [2020-10-13 10:31:28,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:31:28,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:28,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:31:28,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:31:28,449 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2020-10-13 10:31:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:28,786 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-13 10:31:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:31:28,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-13 10:31:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:28,788 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:31:28,788 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:31:28,788 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 [2020-10-13 10:31:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:31:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-13 10:31:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:31:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 10:31:28,798 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-13 10:31:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:28,798 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 10:31:28,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:31:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 10:31:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:31:28,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:28,799 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:28,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:31:28,800 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:28,800 INFO L82 PathProgramCache]: Analyzing trace with hash -82655559, now seen corresponding path program 3 times [2020-10-13 10:31:28,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:28,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815033723] [2020-10-13 10:31:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:28,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:29,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:29,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:31:29,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:29,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-13 10:31:29,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:31:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:31:29,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:29,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:29,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:29,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:29,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:29,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:29,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:29,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:29,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815033723] [2020-10-13 10:31:29,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:29,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:31:29,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577367260] [2020-10-13 10:31:29,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:31:29,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:31:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:29,243 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-13 10:31:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:29,530 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-13 10:31:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:31:29,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-13 10:31:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:29,531 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:31:29,531 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:31:29,532 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 [2020-10-13 10:31:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:31:29,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-13 10:31:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:31:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 10:31:29,537 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-13 10:31:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:29,538 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 10:31:29,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:31:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 10:31:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:31:29,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:29,539 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:29,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:31:29,539 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1179253650, now seen corresponding path program 4 times [2020-10-13 10:31:29,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:29,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741087757] [2020-10-13 10:31:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:29,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:29,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:29,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:31:29,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:29,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-13 10:31:29,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:29,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:31:29,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:29,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:31:29,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:30,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:30,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:30,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:30,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:30,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:30,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:30,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:30,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:30,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:30,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:31:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:30,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741087757] [2020-10-13 10:31:30,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:30,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:31:30,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090655982] [2020-10-13 10:31:30,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:31:30,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:30,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:31:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:30,112 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-13 10:31:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:30,593 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-13 10:31:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:31:30,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-13 10:31:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:30,595 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:31:30,595 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:31:30,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:31:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:31:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-13 10:31:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:31:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 10:31:30,603 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-10-13 10:31:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:30,603 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 10:31:30,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:31:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 10:31:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:31:30,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:30,604 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:30,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:31:30,604 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1370635575, now seen corresponding path program 5 times [2020-10-13 10:31:30,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:30,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472754859] [2020-10-13 10:31:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:30,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:30,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:31:30,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:30,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-13 10:31:30,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:31:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:31:30,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:31,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:31,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:31,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:31,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:31:31,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:31,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472754859] [2020-10-13 10:31:31,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:31,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:31:31,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550180745] [2020-10-13 10:31:31,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:31:31,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:31,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:31:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:31:31,380 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-13 10:31:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:31,938 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-13 10:31:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:31:31,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-13 10:31:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:31,940 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:31:31,940 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:31:31,941 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 [2020-10-13 10:31:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:31:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-13 10:31:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:31:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 10:31:31,956 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 29 [2020-10-13 10:31:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:31,956 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 10:31:31,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:31:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 10:31:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:31:31,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:31,958 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:31,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:31:31,958 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:31,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:31,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1682132144, now seen corresponding path program 6 times [2020-10-13 10:31:31,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:31,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381554732] [2020-10-13 10:31:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:32,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:32,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:31:32,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:32,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-13 10:31:32,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:32,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:31:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:31:32,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:32,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:32,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:32,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:32,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:32,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:32,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:32,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:32,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:32,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381554732] [2020-10-13 10:31:32,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:32,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:31:32,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279504035] [2020-10-13 10:31:32,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:31:32,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:32,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:31:32,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:31:32,576 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-13 10:31:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:32,959 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-13 10:31:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:31:32,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-13 10:31:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:32,961 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:31:32,961 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:31:32,962 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 [2020-10-13 10:31:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:31:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-13 10:31:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:31:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 10:31:32,967 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-13 10:31:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:32,967 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 10:31:32,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:31:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 10:31:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:31:32,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:32,968 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:32,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:31:32,969 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:32,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:32,969 INFO L82 PathProgramCache]: Analyzing trace with hash -345469767, now seen corresponding path program 7 times [2020-10-13 10:31:32,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:32,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784823105] [2020-10-13 10:31:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:33,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:33,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:31:33,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:33,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-13 10:31:33,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:33,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:31:33,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:33,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:31:33,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:33,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:33,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:33,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:33,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:33,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:33,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784823105] [2020-10-13 10:31:33,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:33,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:31:33,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238131678] [2020-10-13 10:31:33,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:31:33,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:33,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:31:33,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:31:33,849 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-13 10:31:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:34,452 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-13 10:31:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:31:34,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-13 10:31:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:34,454 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:31:34,454 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:31:34,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:31:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:31:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-13 10:31:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:31:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 10:31:34,465 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2020-10-13 10:31:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:34,466 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 10:31:34,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:31:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 10:31:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:31:34,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:34,470 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:34,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:31:34,470 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:34,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1392421246, now seen corresponding path program 8 times [2020-10-13 10:31:34,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:34,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563751071] [2020-10-13 10:31:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:34,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:34,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:34,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:31:34,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:34,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-13 10:31:34,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:31:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:31:34,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:35,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:35,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:35,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:35,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:35,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:35,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:35,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:35,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:35,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563751071] [2020-10-13 10:31:35,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:35,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:31:35,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200718118] [2020-10-13 10:31:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:31:35,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:31:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:35,413 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-13 10:31:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:36,093 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-13 10:31:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:31:36,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-13 10:31:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:36,094 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:31:36,095 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:31:36,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:31:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:31:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-13 10:31:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:31:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 10:31:36,107 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-13 10:31:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:36,108 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 10:31:36,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:31:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 10:31:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:31:36,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:36,109 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:36,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:31:36,109 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1143325495, now seen corresponding path program 9 times [2020-10-13 10:31:36,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:36,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872419293] [2020-10-13 10:31:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:36,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:31:36,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-13 10:31:36,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:31:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:31:36,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:37,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:37,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:37,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:37,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:37,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:37,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:37,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:37,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:37,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:37,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:37,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:37,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872419293] [2020-10-13 10:31:37,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:37,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:31:37,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861193549] [2020-10-13 10:31:37,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:31:37,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:37,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:31:37,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:37,341 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-13 10:31:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:38,149 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-13 10:31:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:31:38,149 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-13 10:31:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:38,150 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:31:38,150 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:31:38,151 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 [2020-10-13 10:31:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:31:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-13 10:31:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:31:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 10:31:38,158 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-13 10:31:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:38,158 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 10:31:38,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:31:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 10:31:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:31:38,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:38,159 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:38,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:31:38,159 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:38,160 INFO L82 PathProgramCache]: Analyzing trace with hash -822332832, now seen corresponding path program 10 times [2020-10-13 10:31:38,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:38,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462881129] [2020-10-13 10:31:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:38,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:38,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:38,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:31:38,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:38,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-13 10:31:38,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:38,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:31:38,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:38,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:31:38,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:39,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:39,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:39,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:39,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:39,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:39,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:31:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:39,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462881129] [2020-10-13 10:31:39,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:39,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:31:39,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811211804] [2020-10-13 10:31:39,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:31:39,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:39,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:31:39,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:31:39,149 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-10-13 10:31:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:39,639 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-13 10:31:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:31:39,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-13 10:31:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:39,641 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:31:39,641 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:31:39,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:31:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:31:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-13 10:31:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:31:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 10:31:39,648 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2020-10-13 10:31:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:39,648 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 10:31:39,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:31:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 10:31:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:31:39,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:39,649 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:39,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:31:39,650 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1714302279, now seen corresponding path program 11 times [2020-10-13 10:31:39,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:39,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397080404] [2020-10-13 10:31:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:39,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:40,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:40,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:31:40,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:40,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-13 10:31:40,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:31:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:31:40,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:40,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:40,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:40,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:40,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:40,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:40,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:40,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:40,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397080404] [2020-10-13 10:31:40,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:40,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:31:40,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685580630] [2020-10-13 10:31:40,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:31:40,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:40,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:31:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:31:40,535 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2020-10-13 10:31:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:41,063 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-13 10:31:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:31:41,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-13 10:31:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:41,065 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:31:41,065 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:31:41,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:31:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:31:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-13 10:31:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:31:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 10:31:41,075 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2020-10-13 10:31:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:41,075 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 10:31:41,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:31:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 10:31:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:31:41,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:41,076 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:41,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:31:41,077 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash 380920258, now seen corresponding path program 12 times [2020-10-13 10:31:41,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:41,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694497630] [2020-10-13 10:31:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:41,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:41,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:41,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:31:41,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:41,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-13 10:31:41,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:41,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:31:41,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:41,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:31:41,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:42,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:42,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:42,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:42,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:42,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:42,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:31:42,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:42,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:42,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694497630] [2020-10-13 10:31:42,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:42,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:31:42,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933907444] [2020-10-13 10:31:42,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:31:42,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:31:42,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:31:42,514 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-10-13 10:31:43,348 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-13 10:31:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:43,742 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-13 10:31:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:31:43,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-13 10:31:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:43,743 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:31:43,743 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:31:43,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:31:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:31:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-13 10:31:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:31:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 10:31:43,751 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-13 10:31:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:43,751 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 10:31:43,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:31:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 10:31:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:31:43,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:43,752 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:43,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:31:43,752 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:43,752 INFO L82 PathProgramCache]: Analyzing trace with hash 696672032, now seen corresponding path program 13 times [2020-10-13 10:31:43,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:43,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814713159] [2020-10-13 10:31:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:43,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:44,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:44,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:31:44,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:44,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-13 10:31:44,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:31:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:31:44,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:45,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:45,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:45,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:45,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:45,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:45,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:45,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:45,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:45,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:45,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:45,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:45,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814713159] [2020-10-13 10:31:45,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:45,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:31:45,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419752492] [2020-10-13 10:31:45,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:31:45,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:31:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:31:45,452 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2020-10-13 10:31:46,112 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-13 10:31:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:46,616 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 10:31:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:31:46,617 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-13 10:31:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:46,618 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:31:46,618 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:31:46,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:31:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:31:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-13 10:31:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:31:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 10:31:46,627 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-13 10:31:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:46,627 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 10:31:46,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:31:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 10:31:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:31:46,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:46,629 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:46,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:31:46,629 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2106679867, now seen corresponding path program 14 times [2020-10-13 10:31:46,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:46,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989793598] [2020-10-13 10:31:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:47,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:47,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:31:47,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-13 10:31:47,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:31:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:47,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:31:47,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:48,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:48,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:48,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:48,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:48,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:48,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:48,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:48,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989793598] [2020-10-13 10:31:48,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:48,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:31:48,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937555564] [2020-10-13 10:31:48,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:31:48,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:31:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:31:48,577 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-13 10:31:49,317 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-13 10:31:49,581 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-13 10:31:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:50,127 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-13 10:31:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:31:50,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-13 10:31:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:50,128 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:31:50,129 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:31:50,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:31:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:31:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2020-10-13 10:31:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:31:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-13 10:31:50,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 43 [2020-10-13 10:31:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:50,138 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-13 10:31:50,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:31:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-13 10:31:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:31:50,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:50,139 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:50,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:31:50,139 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1279393026, now seen corresponding path program 15 times [2020-10-13 10:31:50,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:50,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733656624] [2020-10-13 10:31:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:50,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:50,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:31:50,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:50,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-13 10:31:50,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:31:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:31:50,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:51,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:51,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:51,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:51,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:51,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:51,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:51,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:51,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:51,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733656624] [2020-10-13 10:31:51,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:51,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:31:51,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598281383] [2020-10-13 10:31:51,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:31:51,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:31:51,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:31:51,834 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 19 states. [2020-10-13 10:31:52,486 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-13 10:31:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:53,034 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-13 10:31:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:31:53,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-13 10:31:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:53,035 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:31:53,035 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:31:53,036 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 [2020-10-13 10:31:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:31:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-13 10:31:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:31:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 10:31:53,042 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-13 10:31:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:53,042 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 10:31:53,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:31:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 10:31:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:31:53,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:53,043 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:53,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:31:53,044 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2042650631, now seen corresponding path program 16 times [2020-10-13 10:31:53,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:53,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638564307] [2020-10-13 10:31:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:53,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:53,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:31:53,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-13 10:31:53,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:31:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:31:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:54,411 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-13 10:31:54,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:54,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:54,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:54,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:54,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:54,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:54,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638564307] [2020-10-13 10:31:54,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:54,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:31:54,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339683381] [2020-10-13 10:31:54,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:31:54,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:31:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:31:54,907 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 21 states. [2020-10-13 10:31:55,508 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-13 10:31:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:55,980 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-13 10:31:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:31:55,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-13 10:31:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:55,984 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:31:55,984 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:31:55,985 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 [2020-10-13 10:31:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:31:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-10-13 10:31:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:31:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 10:31:55,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-10-13 10:31:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:55,992 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 10:31:55,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:31:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 10:31:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:31:55,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:55,993 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:55,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:31:55,993 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 882343476, now seen corresponding path program 17 times [2020-10-13 10:31:55,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:55,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301902725] [2020-10-13 10:31:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:56,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:56,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:56,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:31:56,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-13 10:31:56,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:31:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:31:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:31:56,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:57,498 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-13 10:31:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:31:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:31:58,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:31:58,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:31:58,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:31:58,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:31:58,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:31:58,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:31:58,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:31:58,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:31:58,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:31:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:31:58,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301902725] [2020-10-13 10:31:58,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:31:58,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:31:58,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690697582] [2020-10-13 10:31:58,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:31:58,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:31:58,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:31:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:31:58,222 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-13 10:31:58,759 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-13 10:31:58,949 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-13 10:31:59,147 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 68 [2020-10-13 10:31:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:31:59,462 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-13 10:31:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:31:59,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-13 10:31:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:31:59,463 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:31:59,464 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:31:59,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:31:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:31:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-13 10:31:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:31:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 10:31:59,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 47 [2020-10-13 10:31:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:31:59,472 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 10:31:59,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:31:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 10:31:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:31:59,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:31:59,472 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:31:59,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:31:59,472 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:31:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:31:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1513160379, now seen corresponding path program 18 times [2020-10-13 10:31:59,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:31:59,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035674987] [2020-10-13 10:31:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:31:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:31:59,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:00,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:00,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:32:00,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:00,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-13 10:32:00,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:32:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:32:00,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:00,939 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-13 10:32:01,059 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-13 10:32:01,211 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-13 10:32:01,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:01,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:01,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:01,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:01,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:01,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:01,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:01,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:02,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035674987] [2020-10-13 10:32:02,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:02,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:32:02,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808158571] [2020-10-13 10:32:02,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:32:02,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:02,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:32:02,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:32:02,008 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-13 10:32:02,756 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:32:03,107 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-13 10:32:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:03,795 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-13 10:32:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:32:03,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-13 10:32:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:03,797 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:32:03,797 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:32:03,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:32:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:32:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-13 10:32:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:32:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 10:32:03,805 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-13 10:32:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:03,805 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 10:32:03,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:32:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 10:32:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:32:03,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:03,806 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:03,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:32:03,806 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash 699503982, now seen corresponding path program 19 times [2020-10-13 10:32:03,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:03,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539061281] [2020-10-13 10:32:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:03,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:04,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:04,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:32:04,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:04,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-13 10:32:04,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:32:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:32:04,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:05,244 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-13 10:32:05,421 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 10:32:05,622 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-13 10:32:06,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:06,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:06,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:06,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:06,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:06,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:06,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:06,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:06,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:06,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:06,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:06,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539061281] [2020-10-13 10:32:06,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:06,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:32:06,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778784691] [2020-10-13 10:32:06,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:32:06,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:06,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:32:06,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:32:06,165 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-13 10:32:06,917 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-13 10:32:07,284 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-10-13 10:32:07,633 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 88 [2020-10-13 10:32:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:07,949 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-13 10:32:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:32:07,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-13 10:32:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:07,950 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:32:07,950 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:32:07,951 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 [2020-10-13 10:32:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:32:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-10-13 10:32:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:32:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 10:32:07,959 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 50 [2020-10-13 10:32:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:07,960 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 10:32:07,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:32:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 10:32:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:32:07,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:07,961 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:07,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:32:07,961 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1411026041, now seen corresponding path program 20 times [2020-10-13 10:32:07,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:07,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547195045] [2020-10-13 10:32:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:08,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:08,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:08,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:32:08,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:08,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-13 10:32:08,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:08,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:32:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:32:08,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:09,358 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-13 10:32:09,566 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-13 10:32:09,931 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-13 10:32:10,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:10,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:10,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:10,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:10,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:10,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547195045] [2020-10-13 10:32:10,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:10,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:32:10,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251448547] [2020-10-13 10:32:10,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:32:10,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:10,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:32:10,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:32:10,400 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 22 states. [2020-10-13 10:32:10,798 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-13 10:32:11,112 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-13 10:32:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:11,758 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-13 10:32:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:32:11,758 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-13 10:32:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:11,759 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:32:11,759 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:32:11,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:32:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:32:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-13 10:32:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:32:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-13 10:32:11,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2020-10-13 10:32:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:11,767 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-13 10:32:11,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:32:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-13 10:32:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:32:11,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:11,768 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:11,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:32:11,769 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:11,769 INFO L82 PathProgramCache]: Analyzing trace with hash -253330444, now seen corresponding path program 21 times [2020-10-13 10:32:11,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:11,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307666161] [2020-10-13 10:32:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:11,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:12,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:12,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:32:12,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:12,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-13 10:32:12,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:12,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:32:12,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:12,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:32:12,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:13,186 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-13 10:32:13,404 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 10:32:13,725 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-13 10:32:13,880 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-13 10:32:14,153 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-13 10:32:14,312 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:32:14,565 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-13 10:32:14,806 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-13 10:32:15,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:15,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:15,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:15,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:15,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:15,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:15,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:15,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:15,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:15,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307666161] [2020-10-13 10:32:15,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:15,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:32:15,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841338876] [2020-10-13 10:32:15,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:32:15,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:32:15,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:32:15,353 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 24 states. [2020-10-13 10:32:16,070 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-13 10:32:16,470 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-13 10:32:16,649 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-13 10:32:17,037 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 94 [2020-10-13 10:32:17,249 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:32:17,733 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 96 [2020-10-13 10:32:18,165 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:32:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:18,918 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-13 10:32:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:32:18,919 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-13 10:32:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:18,920 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:32:18,920 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:32:18,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:32:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:32:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-10-13 10:32:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:32:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 10:32:18,928 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-13 10:32:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:18,928 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 10:32:18,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:32:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 10:32:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:32:18,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:18,929 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:18,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:32:18,929 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash -704856146, now seen corresponding path program 22 times [2020-10-13 10:32:18,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:18,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2333339] [2020-10-13 10:32:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:19,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:20,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:20,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:32:20,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:20,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-13 10:32:20,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:20,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:32:20,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:20,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:32:20,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:20,631 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-13 10:32:20,768 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-13 10:32:20,943 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-13 10:32:21,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:21,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:21,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:21,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:21,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:21,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:21,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:21,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:21,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2333339] [2020-10-13 10:32:21,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:21,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:32:21,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553130] [2020-10-13 10:32:21,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:32:21,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:21,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:32:21,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:32:21,707 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-13 10:32:22,516 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-13 10:32:22,861 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:32:23,322 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2020-10-13 10:32:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:24,266 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-13 10:32:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:32:24,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-13 10:32:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:24,268 INFO L225 Difference]: With dead ends: 84 [2020-10-13 10:32:24,268 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:32:24,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:32:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:32:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-13 10:32:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:32:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 10:32:24,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2020-10-13 10:32:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:24,277 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 10:32:24,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:32:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 10:32:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:32:24,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:24,278 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:24,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:32:24,278 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash 163099821, now seen corresponding path program 23 times [2020-10-13 10:32:24,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:24,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223275597] [2020-10-13 10:32:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:32:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:26,177 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-13 10:32:26,343 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-13 10:32:26,625 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 10:32:26,869 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-13 10:32:27,157 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 10:32:27,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:27,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:27,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:27,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:27,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:27,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:27,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:27,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223275597] [2020-10-13 10:32:27,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:27,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:32:27,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910865192] [2020-10-13 10:32:27,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:32:27,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:32:27,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:32:27,715 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-13 10:32:28,695 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-10-13 10:32:28,869 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:32:29,125 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-10-13 10:32:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:29,927 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-13 10:32:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:32:29,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-13 10:32:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:29,929 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:32:29,929 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:32:29,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:32:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:32:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-10-13 10:32:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:32:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-13 10:32:29,940 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 57 [2020-10-13 10:32:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:29,940 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-13 10:32:29,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:32:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-13 10:32:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:32:29,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:29,941 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:29,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:32:29,941 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash -269473356, now seen corresponding path program 24 times [2020-10-13 10:32:29,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:29,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395956628] [2020-10-13 10:32:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:30,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:30,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:32:30,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:31,629 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-13 10:32:31,824 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-13 10:32:32,101 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-13 10:32:32,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:32,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:32,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:32,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:32,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395956628] [2020-10-13 10:32:32,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:32,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:32:32,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605795215] [2020-10-13 10:32:32,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:32:32,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:32,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:32:32,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:32:32,882 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 25 states. [2020-10-13 10:32:33,840 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:32:34,262 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2020-10-13 10:32:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:35,054 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-13 10:32:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:32:35,055 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-13 10:32:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:35,056 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:32:35,056 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:32:35,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:32:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:32:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-13 10:32:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:32:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 10:32:35,066 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-13 10:32:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:35,066 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 10:32:35,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:32:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 10:32:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:32:35,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:35,066 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:35,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:32:35,067 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1303617621, now seen corresponding path program 25 times [2020-10-13 10:32:35,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:35,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534474051] [2020-10-13 10:32:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:35,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:36,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:36,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:32:36,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1374 [2020-10-13 10:32:36,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:32:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:32:36,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:32:37,329 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-13 10:32:37,637 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-13 10:32:37,775 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-13 10:32:37,986 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-10-13 10:32:38,201 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-13 10:32:38,403 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-13 10:32:38,574 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-13 10:32:39,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:39,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:39,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:39,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:39,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534474051] [2020-10-13 10:32:39,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:39,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:32:39,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511649671] [2020-10-13 10:32:39,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:32:39,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:39,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:32:39,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:32:39,118 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2020-10-13 10:32:39,883 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-13 10:32:40,162 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-13 10:32:40,512 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-10-13 10:32:40,879 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 98 [2020-10-13 10:32:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:41,869 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-13 10:32:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:32:41,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-13 10:32:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:41,871 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:32:41,871 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:32:41,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:32:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:32:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-13 10:32:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:32:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-13 10:32:41,883 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2020-10-13 10:32:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:41,883 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-13 10:32:41,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:32:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-13 10:32:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:32:41,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:41,884 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:41,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:32:41,885 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:41,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1998722842, now seen corresponding path program 26 times [2020-10-13 10:32:41,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:41,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656807550] [2020-10-13 10:32:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:43,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:43,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:32:43,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-13 10:32:43,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:32:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:32:43,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:43,751 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-13 10:32:44,015 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-13 10:32:44,291 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-13 10:32:44,466 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-13 10:32:44,682 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-13 10:32:45,208 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-13 10:32:45,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:45,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:45,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:45,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:45,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:45,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:32:45,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:45,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:32:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656807550] [2020-10-13 10:32:45,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:45,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:32:45,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17182000] [2020-10-13 10:32:45,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:32:45,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:45,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:32:45,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:32:45,872 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-13 10:32:46,809 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-13 10:32:47,004 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:32:47,228 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 10:32:47,539 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2020-10-13 10:32:47,875 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 102 [2020-10-13 10:32:48,260 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 94 [2020-10-13 10:32:48,675 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 99 [2020-10-13 10:32:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:49,354 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-13 10:32:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:32:49,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-13 10:32:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:49,356 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:32:49,356 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:32:49,358 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 [2020-10-13 10:32:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:32:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-13 10:32:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:32:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-13 10:32:49,367 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-13 10:32:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:49,367 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-13 10:32:49,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:32:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-13 10:32:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:32:49,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:49,368 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:49,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:32:49,368 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash 983118765, now seen corresponding path program 27 times [2020-10-13 10:32:49,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:49,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987109230] [2020-10-13 10:32:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:51,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:51,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:32:51,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:51,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1583 [2020-10-13 10:32:51,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:51,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:32:51,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:51,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:32:51,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:52,021 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-13 10:32:52,368 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-13 10:32:52,521 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-13 10:32:52,864 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-10-13 10:32:53,056 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-10-13 10:32:53,264 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-13 10:32:53,447 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-13 10:32:54,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:32:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:54,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:54,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:54,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:32:54,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:54,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:32:54,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:32:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:32:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:32:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:32:54,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987109230] [2020-10-13 10:32:54,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:32:54,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:32:54,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205827829] [2020-10-13 10:32:54,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:32:54,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:32:54,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:32:54,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:32:54,138 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-13 10:32:55,335 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2020-10-13 10:32:55,568 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 10:32:55,920 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 105 [2020-10-13 10:32:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:32:57,045 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-13 10:32:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:32:57,045 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-13 10:32:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:32:57,046 INFO L225 Difference]: With dead ends: 94 [2020-10-13 10:32:57,046 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:32:57,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:32:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:32:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-13 10:32:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:32:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 10:32:57,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-13 10:32:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:32:57,062 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 10:32:57,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:32:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 10:32:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:32:57,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:32:57,063 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:32:57,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:32:57,064 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:32:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:32:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1479267708, now seen corresponding path program 28 times [2020-10-13 10:32:57,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:32:57,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314072464] [2020-10-13 10:32:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:32:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:32:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:32:58,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:32:58,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:32:58,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:32:58,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1596 [2020-10-13 10:32:58,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:32:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:32:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:32:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:32:58,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:32:59,329 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-13 10:32:59,565 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:32:59,862 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 10:33:00,300 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-13 10:33:00,502 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-13 10:33:00,649 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-13 10:33:01,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:01,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:01,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:01,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:01,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:01,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:01,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:01,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314072464] [2020-10-13 10:33:01,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:01,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:33:01,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944438066] [2020-10-13 10:33:01,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:33:01,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:33:01,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:33:01,297 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-10-13 10:33:02,097 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 10:33:02,380 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-13 10:33:02,702 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-13 10:33:03,140 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 97 [2020-10-13 10:33:03,528 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 109 [2020-10-13 10:33:03,959 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 113 [2020-10-13 10:33:04,571 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-13 10:33:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:05,192 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-13 10:33:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:33:05,197 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-13 10:33:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:05,198 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:33:05,198 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:33:05,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:33:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:33:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-10-13 10:33:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:33:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-13 10:33:05,213 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 64 [2020-10-13 10:33:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:05,213 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-13 10:33:05,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:33:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-13 10:33:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:33:05,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:05,214 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:05,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:33:05,214 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:05,214 INFO L82 PathProgramCache]: Analyzing trace with hash 713998677, now seen corresponding path program 29 times [2020-10-13 10:33:05,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:05,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945079444] [2020-10-13 10:33:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:06,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:06,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:33:06,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:06,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-13 10:33:06,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:33:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:33:06,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:07,215 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-13 10:33:07,563 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-13 10:33:07,704 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 10:33:07,915 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-13 10:33:08,082 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-13 10:33:08,255 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 10:33:09,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:09,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:09,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:09,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:09,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:09,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945079444] [2020-10-13 10:33:09,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:09,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:33:09,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085338317] [2020-10-13 10:33:09,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:33:09,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:09,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:33:09,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:33:09,207 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 28 states. [2020-10-13 10:33:09,704 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-13 10:33:10,080 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:33:10,522 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:33:10,738 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:33:11,070 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-13 10:33:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:12,116 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-13 10:33:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:33:12,117 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-13 10:33:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:12,118 INFO L225 Difference]: With dead ends: 107 [2020-10-13 10:33:12,118 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:33:12,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:33:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:33:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-13 10:33:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:33:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-13 10:33:12,130 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-10-13 10:33:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:12,130 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-13 10:33:12,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:33:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-13 10:33:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:33:12,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:12,131 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:12,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:33:12,131 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:12,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273242, now seen corresponding path program 30 times [2020-10-13 10:33:12,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:12,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131939777] [2020-10-13 10:33:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:13,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:13,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:33:13,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:13,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-13 10:33:13,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:13,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:33:13,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:13,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:33:13,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:14,265 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-13 10:33:14,452 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 10:33:14,718 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-13 10:33:15,014 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-13 10:33:15,147 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 10:33:15,389 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2020-10-13 10:33:15,562 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-13 10:33:15,816 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2020-10-13 10:33:16,004 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-13 10:33:16,219 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-13 10:33:16,414 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-13 10:33:17,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:17,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:17,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:17,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:17,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:33:17,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:17,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:17,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:17,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:17,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:17,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131939777] [2020-10-13 10:33:17,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:17,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:33:17,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058397670] [2020-10-13 10:33:17,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:33:17,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:33:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:33:17,313 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-13 10:33:18,239 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-13 10:33:18,682 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-13 10:33:18,893 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:33:19,249 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-13 10:33:19,487 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-13 10:33:19,871 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 113 [2020-10-13 10:33:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:21,069 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-13 10:33:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:33:21,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-13 10:33:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:21,070 INFO L225 Difference]: With dead ends: 98 [2020-10-13 10:33:21,071 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:33:21,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:33:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:33:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-13 10:33:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:33:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 10:33:21,084 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-13 10:33:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:21,084 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 10:33:21,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:33:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 10:33:21,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:33:21,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:21,085 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:21,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:33:21,085 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1403461411, now seen corresponding path program 31 times [2020-10-13 10:33:21,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:21,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964469589] [2020-10-13 10:33:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:21,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:22,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:22,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:33:22,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:22,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1825 [2020-10-13 10:33:22,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:22,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:33:22,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:22,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:33:22,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:23,542 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 10:33:23,992 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-13 10:33:24,336 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-13 10:33:24,504 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-13 10:33:24,782 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-10-13 10:33:25,004 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-10-13 10:33:25,198 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-13 10:33:25,367 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-13 10:33:26,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:26,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:26,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:26,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:26,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:26,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:26,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:26,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:26,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:26,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:26,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 2 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:26,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964469589] [2020-10-13 10:33:26,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:26,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:33:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529580934] [2020-10-13 10:33:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:33:26,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:33:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:33:26,081 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-13 10:33:27,548 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 91 [2020-10-13 10:33:27,776 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-13 10:33:28,205 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 119 [2020-10-13 10:33:28,751 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 125 [2020-10-13 10:33:29,327 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 127 [2020-10-13 10:33:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:30,153 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-13 10:33:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:33:30,153 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-13 10:33:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:30,154 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:33:30,154 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 10:33:30,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:33:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 10:33:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-13 10:33:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:33:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 10:33:30,172 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2020-10-13 10:33:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:30,172 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 10:33:30,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:33:30,172 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 10:33:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:33:30,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:30,173 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:30,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:33:30,174 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash 878591292, now seen corresponding path program 32 times [2020-10-13 10:33:30,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:30,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503394061] [2020-10-13 10:33:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:30,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:31,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:33:31,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:32,585 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-13 10:33:32,824 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-13 10:33:32,970 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-13 10:33:33,245 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-13 10:33:33,466 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-13 10:33:33,815 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-13 10:33:33,994 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 10:33:34,462 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2020-10-13 10:33:34,704 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 10:33:35,174 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-13 10:33:36,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:36,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:36,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:36,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:36,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:36,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:36,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:36,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:36,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:36,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:36,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503394061] [2020-10-13 10:33:36,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:36,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:33:36,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182237963] [2020-10-13 10:33:36,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:33:36,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:33:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:33:36,262 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-13 10:33:36,987 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-13 10:33:37,439 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:33:37,715 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:33:38,146 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 114 [2020-10-13 10:33:38,475 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-13 10:33:39,132 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 149 [2020-10-13 10:33:39,578 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2020-10-13 10:33:40,672 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 183 [2020-10-13 10:33:41,238 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 132 [2020-10-13 10:33:43,337 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 233 DAG size of output: 212 [2020-10-13 10:33:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:45,121 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-13 10:33:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:33:45,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-13 10:33:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:45,123 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:33:45,123 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:33:45,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=202, Invalid=2878, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:33:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:33:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-13 10:33:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:33:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-13 10:33:45,141 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2020-10-13 10:33:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:45,142 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-13 10:33:45,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:33:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-13 10:33:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:33:45,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:45,143 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:45,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:33:45,143 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash -982869473, now seen corresponding path program 33 times [2020-10-13 10:33:45,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:45,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118610203] [2020-10-13 10:33:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:45,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:47,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:47,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:33:47,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:47,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1881 [2020-10-13 10:33:47,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:47,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:33:47,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:47,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:33:47,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:47,802 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-13 10:33:48,096 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-13 10:33:48,454 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-13 10:33:48,634 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:33:48,915 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-10-13 10:33:49,137 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-13 10:33:49,480 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-13 10:33:49,750 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-13 10:33:50,003 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-13 10:33:50,221 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-13 10:33:50,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:50,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:50,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:50,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:50,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:50,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:33:50,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:50,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:51,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118610203] [2020-10-13 10:33:51,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:51,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:33:51,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075318849] [2020-10-13 10:33:51,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:33:51,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:33:51,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:33:51,026 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-13 10:33:52,558 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-13 10:33:53,095 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 110 [2020-10-13 10:33:53,559 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 108 [2020-10-13 10:33:54,037 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 111 [2020-10-13 10:33:54,684 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-13 10:33:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:55,476 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-10-13 10:33:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:33:55,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-13 10:33:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:55,478 INFO L225 Difference]: With dead ends: 130 [2020-10-13 10:33:55,478 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 10:33:55,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=221, Invalid=2535, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:33:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 10:33:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2020-10-13 10:33:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 10:33:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-13 10:33:55,494 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 71 [2020-10-13 10:33:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:55,494 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-13 10:33:55,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:33:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-13 10:33:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:33:55,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:55,494 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:55,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:33:55,495 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash 587340134, now seen corresponding path program 34 times [2020-10-13 10:33:55,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:55,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035079336] [2020-10-13 10:33:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:55,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:57,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1576 [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:33:57,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:57,747 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-13 10:33:57,984 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-13 10:33:58,186 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-13 10:33:58,590 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-10-13 10:33:58,759 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-13 10:33:59,111 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-10-13 10:33:59,302 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-13 10:33:59,518 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-13 10:33:59,744 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-13 10:33:59,905 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-13 10:34:00,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:00,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:00,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:00,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:00,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:00,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:00,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:00,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:00,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:00,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:34:00,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035079336] [2020-10-13 10:34:00,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:00,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:34:00,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701187267] [2020-10-13 10:34:00,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:34:00,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:34:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:34:00,987 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2020-10-13 10:34:01,724 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-13 10:34:01,946 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:34:02,232 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:34:02,463 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:02,784 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-13 10:34:03,040 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:34:03,471 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2020-10-13 10:34:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:04,853 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-13 10:34:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:34:04,853 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-13 10:34:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:04,854 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:34:04,854 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 10:34:04,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=154, Invalid=2198, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:34:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 10:34:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-13 10:34:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 10:34:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 10:34:04,872 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-13 10:34:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:04,872 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 10:34:04,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:34:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 10:34:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:34:04,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:04,873 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:04,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:34:04,874 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1867551325, now seen corresponding path program 35 times [2020-10-13 10:34:04,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:04,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774952223] [2020-10-13 10:34:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:07,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2066 [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:34:07,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:08,001 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 10:34:08,233 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-13 10:34:08,388 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-13 10:34:08,658 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-13 10:34:08,845 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-13 10:34:09,252 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2020-10-13 10:34:09,473 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-13 10:34:09,782 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2020-10-13 10:34:10,031 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-10-13 10:34:10,300 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-13 10:34:10,602 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-10-13 10:34:11,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:11,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:11,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:11,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:11,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:11,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:11,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:11,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:11,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:11,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:11,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:34:11,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774952223] [2020-10-13 10:34:11,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:11,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:34:11,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759507643] [2020-10-13 10:34:11,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:34:11,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:11,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:34:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:34:11,858 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 33 states. [2020-10-13 10:34:13,121 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-13 10:34:13,645 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-13 10:34:13,921 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:14,278 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-13 10:34:14,550 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:34:15,051 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 121 [2020-10-13 10:34:15,340 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-13 10:34:15,848 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 123 [2020-10-13 10:34:17,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:17,495 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-13 10:34:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:34:17,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-13 10:34:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:17,497 INFO L225 Difference]: With dead ends: 108 [2020-10-13 10:34:17,497 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 10:34:17,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=223, Invalid=3083, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:34:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 10:34:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2020-10-13 10:34:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:34:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 10:34:17,515 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2020-10-13 10:34:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:17,515 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 10:34:17,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:34:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 10:34:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:34:17,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:17,516 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:17,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:34:17,516 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:17,516 INFO L82 PathProgramCache]: Analyzing trace with hash -213944680, now seen corresponding path program 36 times [2020-10-13 10:34:17,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:17,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482717262] [2020-10-13 10:34:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:17,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:19,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:19,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:34:19,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-10-13 10:34:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:34:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:34:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:34:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:20,502 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-13 10:34:20,742 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:34:20,878 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-13 10:34:21,125 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-13 10:34:21,472 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-13 10:34:21,792 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:34:22,273 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-10-13 10:34:22,503 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-13 10:34:22,737 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 10:34:22,908 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-13 10:34:24,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:24,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:24,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:24,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:24,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:24,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:24,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:34:24,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482717262] [2020-10-13 10:34:24,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:24,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:34:24,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363492674] [2020-10-13 10:34:24,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:34:24,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:34:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:34:24,143 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-13 10:34:24,888 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-13 10:34:25,293 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 10:34:25,750 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-13 10:34:26,281 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-13 10:34:26,519 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:26,833 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-13 10:34:27,102 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-13 10:34:27,499 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-13 10:34:27,769 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-13 10:34:28,315 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 134 [2020-10-13 10:34:28,845 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 130 [2020-10-13 10:34:29,481 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 144 [2020-10-13 10:34:30,163 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-10-13 10:34:30,917 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 129 [2020-10-13 10:34:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:31,915 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-13 10:34:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:34:31,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-13 10:34:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:31,917 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:34:31,918 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:34:31,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=257, Invalid=3525, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:34:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:34:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2020-10-13 10:34:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:34:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 10:34:31,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 75 [2020-10-13 10:34:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:31,935 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 10:34:31,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:34:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 10:34:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 10:34:31,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:31,935 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:31,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:34:31,936 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash 789691295, now seen corresponding path program 37 times [2020-10-13 10:34:31,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:31,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596916932] [2020-10-13 10:34:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:32,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2301 [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:34:34,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:34:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:34,856 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-13 10:34:35,148 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-13 10:34:35,515 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-13 10:34:35,658 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 10:34:35,878 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-13 10:34:36,046 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-13 10:34:36,328 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-13 10:34:36,535 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-13 10:34:36,845 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2020-10-13 10:34:37,090 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-13 10:34:37,330 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-13 10:34:37,565 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-13 10:34:38,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:38,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:38,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:38,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:38,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:38,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:38,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:38,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:38,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:38,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:38,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:34:38,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596916932] [2020-10-13 10:34:38,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:38,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:34:38,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666760686] [2020-10-13 10:34:38,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:34:38,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:34:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:34:38,910 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-13 10:34:40,750 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 90 [2020-10-13 10:34:40,994 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:34:41,357 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-13 10:34:41,632 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:34:42,038 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-13 10:34:42,352 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-13 10:34:42,869 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 126 [2020-10-13 10:34:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:44,632 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-13 10:34:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:34:44,633 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-13 10:34:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:44,634 INFO L225 Difference]: With dead ends: 114 [2020-10-13 10:34:44,635 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 10:34:44,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:34:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 10:34:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2020-10-13 10:34:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:34:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 10:34:44,654 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2020-10-13 10:34:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:44,654 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 10:34:44,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:34:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 10:34:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:34:44,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:44,655 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:44,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:34:44,655 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:44,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:44,656 INFO L82 PathProgramCache]: Analyzing trace with hash 110367370, now seen corresponding path program 38 times [2020-10-13 10:34:44,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:44,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475093571] [2020-10-13 10:34:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:48,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:48,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:34:48,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3479 [2020-10-13 10:34:48,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:34:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:34:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:34:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:49,101 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-13 10:34:49,391 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-13 10:34:49,761 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-13 10:34:49,924 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-13 10:34:50,202 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-13 10:34:50,434 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-13 10:34:50,809 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-13 10:34:51,114 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-13 10:34:51,563 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-10-13 10:34:51,887 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-10-13 10:34:52,639 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-10-13 10:34:52,941 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-13 10:34:53,244 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-13 10:34:53,512 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-13 10:34:54,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:54,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:54,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:54,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:54,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:54,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:54,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:54,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:34:54,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475093571] [2020-10-13 10:34:54,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:54,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:34:54,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107189673] [2020-10-13 10:34:54,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:34:54,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:34:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:34:54,847 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 35 states. [2020-10-13 10:34:55,576 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-13 10:34:55,892 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-13 10:34:56,281 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-13 10:34:56,691 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-13 10:34:57,136 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-13 10:34:57,658 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-13 10:34:58,250 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 114 [2020-10-13 10:34:58,607 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-13 10:34:59,166 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 140 [2020-10-13 10:34:59,925 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-13 10:35:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:01,072 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-10-13 10:35:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:35:01,072 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-13 10:35:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:01,074 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:35:01,074 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 10:35:01,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=227, Invalid=3079, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:35:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 10:35:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 91. [2020-10-13 10:35:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:35:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-13 10:35:01,100 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 78 [2020-10-13 10:35:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:01,101 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-13 10:35:01,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:35:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-13 10:35:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:35:01,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:01,102 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:01,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:35:01,102 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2132616157, now seen corresponding path program 39 times [2020-10-13 10:35:01,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:01,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973037754] [2020-10-13 10:35:01,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:01,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:04,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:04,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:35:04,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2838 [2020-10-13 10:35:04,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:35:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 10:35:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:04,599 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-13 10:35:04,851 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-13 10:35:05,206 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-10-13 10:35:05,362 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 10:35:05,619 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-13 10:35:05,815 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-13 10:35:06,148 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2020-10-13 10:35:06,383 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-10-13 10:35:06,726 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 102 [2020-10-13 10:35:06,986 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-13 10:35:07,253 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-13 10:35:07,453 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-13 10:35:08,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:08,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:08,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:08,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:08,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:08,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:35:08,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:08,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:08,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:08,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:08,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 10 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:08,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973037754] [2020-10-13 10:35:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:08,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:35:08,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387923016] [2020-10-13 10:35:08,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:35:08,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:08,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:35:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:35:08,919 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 34 states. [2020-10-13 10:35:09,972 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:35:10,421 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:35:10,633 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:35:10,947 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:35:11,194 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:35:11,527 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-13 10:35:11,805 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:35:12,211 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-13 10:35:12,531 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-13 10:35:13,054 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 124 [2020-10-13 10:35:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:14,689 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2020-10-13 10:35:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:35:14,690 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-10-13 10:35:14,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:14,691 INFO L225 Difference]: With dead ends: 127 [2020-10-13 10:35:14,692 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:35:14,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=199, Invalid=3461, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:35:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:35:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-13 10:35:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:35:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-13 10:35:14,711 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 80 [2020-10-13 10:35:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:14,711 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-13 10:35:14,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:35:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-13 10:35:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 10:35:14,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:14,712 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:14,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:35:14,712 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1985767080, now seen corresponding path program 40 times [2020-10-13 10:35:14,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:14,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754579220] [2020-10-13 10:35:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking...