/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:34:10,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:34:10,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:34:10,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:34:10,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:34:10,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:34:10,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:34:10,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:34:10,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:34:10,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:34:10,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:34:10,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:34:10,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:34:10,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:34:10,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:34:10,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:34:10,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:34:10,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:34:10,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:34:10,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:34:10,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:34:10,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:34:10,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:34:10,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:34:10,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:34:10,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:34:10,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:34:10,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:34:10,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:34:10,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:34:10,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:34:10,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:34:10,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:34:10,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:34:10,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:34:10,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:34:10,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:34:10,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:34:10,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:34:10,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:34:10,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:34:10,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:34:10,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:34:10,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:34:10,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:34:10,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:34:10,622 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:34:10,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:34:10,622 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:34:10,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:34:10,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:34:10,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:34:10,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:34:10,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:34:10,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:34:10,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:34:10,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:34:10,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:34:10,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:34:10,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:34:10,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:34:10,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:34:10,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:34:10,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:34:10,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:34:10,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:34:10,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:34:10,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:34:10,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:34:10,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:34:10,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:34:10,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:34:10,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:34:10,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:34:10,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:34:10,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:34:10,928 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:34:10,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-12 15:34:10,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbd1eb506/bc1d5d3ae283486d87539176a6c5779b/FLAGc48e454d8 [2020-10-12 15:34:11,481 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:34:11,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-12 15:34:11,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbd1eb506/bc1d5d3ae283486d87539176a6c5779b/FLAGc48e454d8 [2020-10-12 15:34:11,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbd1eb506/bc1d5d3ae283486d87539176a6c5779b [2020-10-12 15:34:11,817 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:34:11,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:34:11,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:34:11,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:34:11,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:34:11,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:34:11" (1/1) ... [2020-10-12 15:34:11,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c2e4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:11, skipping insertion in model container [2020-10-12 15:34:11,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:34:11" (1/1) ... [2020-10-12 15:34:11,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:34:11,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:34:12,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:34:12,380 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:34:12,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:34:12,472 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:34:12,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12 WrapperNode [2020-10-12 15:34:12,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:34:12,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:34:12,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:34:12,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:34:12,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... [2020-10-12 15:34:12,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... [2020-10-12 15:34:12,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... [2020-10-12 15:34:12,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... [2020-10-12 15:34:12,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... [2020-10-12 15:34:12,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... [2020-10-12 15:34:12,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... [2020-10-12 15:34:12,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:34:12,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:34:12,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:34:12,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:34:12,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:34:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:34:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:34:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:34:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:34:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:34:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:34:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:34:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:34:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:34:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:34:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:34:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:34:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:34:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:34:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:34:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:34:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:34:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:34:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:34:12,615 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:34:12,615 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:34:12,615 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:34:12,616 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:34:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:34:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:34:12,619 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:34:12,619 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:34:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:34:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:34:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:34:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:34:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:34:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:34:12,620 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:34:12,621 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:34:12,621 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:34:12,621 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:34:12,621 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:34:12,623 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:34:12,623 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:34:12,623 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:34:12,623 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:34:12,623 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:34:12,623 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:34:12,625 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:34:12,625 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:34:12,625 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:34:12,625 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:34:12,625 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:34:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:34:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:34:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:34:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:34:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:34:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:34:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:34:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:34:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:34:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:34:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:34:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:34:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:34:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:34:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:34:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:34:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:34:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:34:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:34:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:34:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:34:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:34:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:34:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:34:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:34:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:34:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:34:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:34:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:34:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:34:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:34:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:34:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:34:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:34:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:34:13,134 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:34:13,135 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 15:34:13,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:34:13 BoogieIcfgContainer [2020-10-12 15:34:13,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:34:13,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:34:13,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:34:13,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:34:13,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:34:11" (1/3) ... [2020-10-12 15:34:13,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f2aa0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:34:13, skipping insertion in model container [2020-10-12 15:34:13,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:12" (2/3) ... [2020-10-12 15:34:13,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f2aa0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:34:13, skipping insertion in model container [2020-10-12 15:34:13,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:34:13" (3/3) ... [2020-10-12 15:34:13,146 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2020-10-12 15:34:13,157 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:34:13,164 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:34:13,178 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:34:13,201 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:34:13,201 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:34:13,201 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:34:13,202 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:34:13,202 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:34:13,202 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:34:13,202 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:34:13,202 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:34:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-12 15:34:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:34:13,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:13,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:13,226 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash 905993573, now seen corresponding path program 1 times [2020-10-12 15:34:13,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:13,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132742526] [2020-10-12 15:34:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:13,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:13,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:13,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:13,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:14,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:14,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:34:14,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:34:14,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-12 15:34:14,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:14,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:34:14,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:14,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:34:14,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:34:14,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:14,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:14,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:14,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:14,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:14,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:34:14,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:14,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:14,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:14,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132742526] [2020-10-12 15:34:14,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:34:14,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:34:14,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888383347] [2020-10-12 15:34:14,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:34:14,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:14,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:34:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:34:14,362 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 9 states. [2020-10-12 15:34:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:15,086 INFO L93 Difference]: Finished difference Result 112 states and 172 transitions. [2020-10-12 15:34:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:34:15,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-12 15:34:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:15,100 INFO L225 Difference]: With dead ends: 112 [2020-10-12 15:34:15,100 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 15:34:15,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:34:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 15:34:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2020-10-12 15:34:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 15:34:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-10-12 15:34:15,150 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 19 [2020-10-12 15:34:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:15,150 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-10-12 15:34:15,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:34:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-10-12 15:34:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:34:15,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:15,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:15,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:34:15,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash 548970733, now seen corresponding path program 1 times [2020-10-12 15:34:15,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:15,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422312860] [2020-10-12 15:34:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:15,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:15,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:15,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:34:15,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:15,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-12 15:34:15,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:15,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:34:15,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:15,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:34:15,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:15,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:15,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:15,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:15,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:15,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:15,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:15,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:15,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:15,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:15,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:15,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:15,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422312860] [2020-10-12 15:34:15,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:34:15,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:34:15,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524523351] [2020-10-12 15:34:15,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:34:15,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:15,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:34:15,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:34:15,505 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 8 states. [2020-10-12 15:34:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:15,919 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-12 15:34:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:34:15,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 15:34:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:15,921 INFO L225 Difference]: With dead ends: 75 [2020-10-12 15:34:15,921 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:34:15,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:34:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:34:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2020-10-12 15:34:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:34:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-12 15:34:15,931 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 20 [2020-10-12 15:34:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:15,931 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-12 15:34:15,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:34:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-12 15:34:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:34:15,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:15,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:15,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:34:15,933 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:15,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142159, now seen corresponding path program 1 times [2020-10-12 15:34:15,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:15,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64726406] [2020-10-12 15:34:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:15,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:15,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:16,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:16,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:16,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:34:16,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:34:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-12 15:34:16,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:34:16,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:16,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:34:16,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:16,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:16,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:16,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:16,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:16,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:16,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:16,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:16,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:16,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:16,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:16,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:16,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64726406] [2020-10-12 15:34:16,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:34:16,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:34:16,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104053400] [2020-10-12 15:34:16,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:34:16,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:34:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:34:16,413 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 9 states. [2020-10-12 15:34:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:16,710 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-12 15:34:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:34:16,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 15:34:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:16,711 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:34:16,711 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:34:16,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:34:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:34:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-12 15:34:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:34:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-12 15:34:16,720 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2020-10-12 15:34:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:16,720 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-12 15:34:16,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:34:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-12 15:34:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:34:16,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:16,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:16,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:34:16,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2019097607, now seen corresponding path program 1 times [2020-10-12 15:34:16,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:16,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745481307] [2020-10-12 15:34:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:16,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:16,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:16,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:17,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:17,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:34:17,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:34:17,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-12 15:34:17,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:34:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 15:34:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:34:17,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:17,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:17,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:17,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:17,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:17,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:17,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:17,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:17,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:17,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:17,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:17,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745481307] [2020-10-12 15:34:17,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:34:17,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:34:17,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550979247] [2020-10-12 15:34:17,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:34:17,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:17,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:34:17,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:34:17,128 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 7 states. [2020-10-12 15:34:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:17,394 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-12 15:34:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:34:17,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-12 15:34:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:17,395 INFO L225 Difference]: With dead ends: 53 [2020-10-12 15:34:17,395 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 15:34:17,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:34:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 15:34:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-12 15:34:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:34:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-12 15:34:17,403 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 21 [2020-10-12 15:34:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:17,403 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-12 15:34:17,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:34:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-12 15:34:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:34:17,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:17,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:17,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:34:17,405 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:17,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2020944649, now seen corresponding path program 1 times [2020-10-12 15:34:17,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:17,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601514755] [2020-10-12 15:34:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:17,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:17,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:17,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:17,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:34:17,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:34:17,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-12 15:34:17,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:17,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:34:17,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:17,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:34:17,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:18,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:18,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:18,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:18,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:18,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:18,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:18,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:18,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:18,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:18,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:18,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:18,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601514755] [2020-10-12 15:34:18,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:34:18,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:34:18,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818167886] [2020-10-12 15:34:18,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:34:18,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:34:18,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:34:18,018 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-10-12 15:34:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:18,492 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2020-10-12 15:34:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:34:18,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-12 15:34:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:18,494 INFO L225 Difference]: With dead ends: 114 [2020-10-12 15:34:18,494 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 15:34:18,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:34:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 15:34:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 50. [2020-10-12 15:34:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:34:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-10-12 15:34:18,503 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 21 [2020-10-12 15:34:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:18,503 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-10-12 15:34:18,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:34:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-10-12 15:34:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:34:18,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:18,504 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:18,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:34:18,505 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash 61652601, now seen corresponding path program 1 times [2020-10-12 15:34:18,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:18,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849866045] [2020-10-12 15:34:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:18,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:19,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:19,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:34:19,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:19,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-12 15:34:19,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:34:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:34:19,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:19,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:19,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:19,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:19,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:19,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:34:19,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:19,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:19,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849866045] [2020-10-12 15:34:19,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:19,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:34:19,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477795851] [2020-10-12 15:34:19,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:34:19,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:19,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:34:19,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:34:19,353 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 11 states. [2020-10-12 15:34:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:20,020 INFO L93 Difference]: Finished difference Result 112 states and 145 transitions. [2020-10-12 15:34:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:34:20,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-12 15:34:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:20,022 INFO L225 Difference]: With dead ends: 112 [2020-10-12 15:34:20,022 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 15:34:20,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:34:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 15:34:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2020-10-12 15:34:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 15:34:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2020-10-12 15:34:20,033 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 23 [2020-10-12 15:34:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:20,034 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2020-10-12 15:34:20,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:34:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2020-10-12 15:34:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:34:20,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:20,035 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:20,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:34:20,035 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:20,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1838507005, now seen corresponding path program 1 times [2020-10-12 15:34:20,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:20,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638504134] [2020-10-12 15:34:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:20,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:20,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:21,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:21,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:34:21,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:34:21,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-12 15:34:21,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:21,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:34:21,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:34:21,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:21,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:21,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:21,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:21,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:21,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:21,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:21,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:21,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:21,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638504134] [2020-10-12 15:34:21,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:21,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:34:21,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123248853] [2020-10-12 15:34:21,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:34:21,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:34:21,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:34:21,530 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand 11 states. [2020-10-12 15:34:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:22,189 INFO L93 Difference]: Finished difference Result 139 states and 181 transitions. [2020-10-12 15:34:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:34:22,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-12 15:34:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:22,191 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:34:22,191 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 15:34:22,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:34:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 15:34:22,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 67. [2020-10-12 15:34:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:34:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-12 15:34:22,204 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 23 [2020-10-12 15:34:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:22,204 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-12 15:34:22,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:34:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-12 15:34:22,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:34:22,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:22,205 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:22,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:34:22,206 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash -910858055, now seen corresponding path program 1 times [2020-10-12 15:34:22,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:22,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56290768] [2020-10-12 15:34:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:22,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:22,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:23,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:23,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:34:23,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:34:23,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-12 15:34:23,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:23,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:34:23,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:23,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:34:23,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:34:23,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:23,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:23,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:23,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:23,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:23,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:34:23,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:23,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:34:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:23,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56290768] [2020-10-12 15:34:23,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:23,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:34:23,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130832597] [2020-10-12 15:34:23,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:34:23,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:23,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:34:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:34:23,679 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 12 states. [2020-10-12 15:34:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:24,242 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2020-10-12 15:34:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:34:24,243 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-12 15:34:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:24,244 INFO L225 Difference]: With dead ends: 115 [2020-10-12 15:34:24,245 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 15:34:24,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:34:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 15:34:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-10-12 15:34:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:34:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-12 15:34:24,259 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 24 [2020-10-12 15:34:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:24,260 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-12 15:34:24,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:34:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-12 15:34:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:34:24,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:24,261 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:24,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:34:24,261 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1799525935, now seen corresponding path program 1 times [2020-10-12 15:34:24,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:24,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150656309] [2020-10-12 15:34:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:24,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:24,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:24,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:24,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:25,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:26,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:26,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:26,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:26,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:34:26,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:34:26,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2669 [2020-10-12 15:34:26,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:26,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:34:26,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:26,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:34:26,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:27,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:27,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:27,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:27,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:27,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:27,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:27,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:27,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:27,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:27,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:27,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:27,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150656309] [2020-10-12 15:34:27,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:27,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:34:27,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918112909] [2020-10-12 15:34:27,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:34:27,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:34:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:34:27,186 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 12 states. [2020-10-12 15:34:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:29,972 INFO L93 Difference]: Finished difference Result 191 states and 246 transitions. [2020-10-12 15:34:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 15:34:29,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-12 15:34:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:29,978 INFO L225 Difference]: With dead ends: 191 [2020-10-12 15:34:29,978 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 15:34:29,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=591, Invalid=1859, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:34:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 15:34:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 66. [2020-10-12 15:34:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:34:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2020-10-12 15:34:29,991 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 24 [2020-10-12 15:34:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:29,991 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2020-10-12 15:34:29,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:34:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2020-10-12 15:34:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:34:29,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:29,992 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:29,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:34:29,993 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash -718586957, now seen corresponding path program 1 times [2020-10-12 15:34:29,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:29,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716938335] [2020-10-12 15:34:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:30,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:30,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:30,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:34:30,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:30,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-12 15:34:30,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:34:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:34:30,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:30,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:30,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:30,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:30,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:30,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:30,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:34:30,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:30,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:30,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716938335] [2020-10-12 15:34:30,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:30,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:34:30,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446747000] [2020-10-12 15:34:30,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:34:30,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:30,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:34:30,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:34:30,494 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand 10 states. [2020-10-12 15:34:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:31,343 INFO L93 Difference]: Finished difference Result 139 states and 181 transitions. [2020-10-12 15:34:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:34:31,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 15:34:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:31,346 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:34:31,346 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 15:34:31,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:34:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 15:34:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 67. [2020-10-12 15:34:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:34:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-10-12 15:34:31,357 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 24 [2020-10-12 15:34:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:31,357 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-10-12 15:34:31,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:34:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-10-12 15:34:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:34:31,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:31,359 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:31,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:34:31,359 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:31,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1537852882, now seen corresponding path program 1 times [2020-10-12 15:34:31,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:31,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479342870] [2020-10-12 15:34:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:31,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:31,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:31,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:34:31,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:31,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-12 15:34:31,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:31,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:34:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:34:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:31,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:31,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:31,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:31,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:31,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:31,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:34:31,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:31,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:31,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:31,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:31,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:31,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479342870] [2020-10-12 15:34:31,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:31,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:34:31,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209497293] [2020-10-12 15:34:31,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:34:31,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:31,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:34:31,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:34:31,512 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 7 states. [2020-10-12 15:34:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:31,776 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-10-12 15:34:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:34:31,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-12 15:34:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:31,778 INFO L225 Difference]: With dead ends: 100 [2020-10-12 15:34:31,778 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 15:34:31,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:34:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 15:34:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 15:34:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 15:34:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2020-10-12 15:34:31,790 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 30 [2020-10-12 15:34:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:31,790 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2020-10-12 15:34:31,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:34:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2020-10-12 15:34:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:34:31,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:31,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:31,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:34:31,792 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash 648427744, now seen corresponding path program 1 times [2020-10-12 15:34:31,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:31,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540379214] [2020-10-12 15:34:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:31,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:31,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:33,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:35,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:35,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:34:35,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:34:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4017 [2020-10-12 15:34:35,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:34:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:34:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:34:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:34:36,506 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 64 [2020-10-12 15:34:36,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:36,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:36,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:36,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:36,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:36,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:36,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:36,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:36,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:36,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540379214] [2020-10-12 15:34:36,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:36,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:34:36,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599834882] [2020-10-12 15:34:36,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:34:36,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:36,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:34:36,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:34:36,846 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 14 states. [2020-10-12 15:34:37,197 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-12 15:34:37,600 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:34:37,843 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:34:38,024 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-12 15:34:38,376 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:34:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:38,971 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2020-10-12 15:34:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:34:38,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:34:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:38,973 INFO L225 Difference]: With dead ends: 183 [2020-10-12 15:34:38,973 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 15:34:38,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:34:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 15:34:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 78. [2020-10-12 15:34:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 15:34:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2020-10-12 15:34:38,985 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 33 [2020-10-12 15:34:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:38,985 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2020-10-12 15:34:38,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:34:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2020-10-12 15:34:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:34:38,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:38,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:38,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:34:38,987 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:38,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1869685148, now seen corresponding path program 1 times [2020-10-12 15:34:38,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:38,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765936495] [2020-10-12 15:34:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:39,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:39,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:39,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:43,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:44,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:44,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:34:44,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 15:34:44,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 15:34:44,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:44,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:34:44,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:34:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:34:44,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:44,315 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2020-10-12 15:34:45,131 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 80 [2020-10-12 15:34:45,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:45,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:45,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:45,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:45,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:34:45,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:45,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765936495] [2020-10-12 15:34:45,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:45,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:34:45,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265435500] [2020-10-12 15:34:45,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:34:45,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:34:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:34:45,473 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand 14 states. [2020-10-12 15:34:45,887 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:34:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:46,896 INFO L93 Difference]: Finished difference Result 167 states and 215 transitions. [2020-10-12 15:34:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:34:46,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:34:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:46,900 INFO L225 Difference]: With dead ends: 167 [2020-10-12 15:34:46,900 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 15:34:46,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:34:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 15:34:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 75. [2020-10-12 15:34:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 15:34:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2020-10-12 15:34:46,911 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 33 [2020-10-12 15:34:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:46,911 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2020-10-12 15:34:46,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:34:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2020-10-12 15:34:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:34:46,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:46,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:46,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:34:46,913 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1928291422, now seen corresponding path program 1 times [2020-10-12 15:34:46,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:46,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384566381] [2020-10-12 15:34:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:46,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:47,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:47,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:47,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:47,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:34:47,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:34:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-12 15:34:47,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:34:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:34:47,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:47,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:47,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:47,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:47,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:47,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:34:47,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:47,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:47,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:47,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:47,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:47,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384566381] [2020-10-12 15:34:47,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:47,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:34:47,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958089665] [2020-10-12 15:34:47,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:34:47,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:47,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:34:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:34:47,842 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand 11 states. [2020-10-12 15:34:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:48,611 INFO L93 Difference]: Finished difference Result 172 states and 220 transitions. [2020-10-12 15:34:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:34:48,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-12 15:34:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:48,613 INFO L225 Difference]: With dead ends: 172 [2020-10-12 15:34:48,614 INFO L226 Difference]: Without dead ends: 153 [2020-10-12 15:34:48,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:34:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-12 15:34:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 93. [2020-10-12 15:34:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 15:34:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2020-10-12 15:34:48,625 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 33 [2020-10-12 15:34:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:48,625 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2020-10-12 15:34:48,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:34:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2020-10-12 15:34:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:34:48,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:48,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:48,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:34:48,627 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:48,627 INFO L82 PathProgramCache]: Analyzing trace with hash -589821470, now seen corresponding path program 1 times [2020-10-12 15:34:48,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:48,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237583670] [2020-10-12 15:34:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:48,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:48,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:49,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:49,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:49,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:50,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:50,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:34:50,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:34:50,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1541 [2020-10-12 15:34:50,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:34:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:34:50,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:50,442 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-10-12 15:34:50,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:50,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:50,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:50,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:50,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:50,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:34:50,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:50,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:50,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:50,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:50,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237583670] [2020-10-12 15:34:50,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:50,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:34:50,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239353665] [2020-10-12 15:34:50,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:34:50,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:34:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:34:50,635 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand 12 states. [2020-10-12 15:34:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:34:51,694 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2020-10-12 15:34:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:34:51,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-12 15:34:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:34:51,696 INFO L225 Difference]: With dead ends: 156 [2020-10-12 15:34:51,696 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 15:34:51,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:34:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 15:34:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 83. [2020-10-12 15:34:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 15:34:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2020-10-12 15:34:51,708 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 33 [2020-10-12 15:34:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:34:51,708 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2020-10-12 15:34:51,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:34:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2020-10-12 15:34:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:34:51,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:51,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:51,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:34:51,710 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:51,711 INFO L82 PathProgramCache]: Analyzing trace with hash -981171556, now seen corresponding path program 1 times [2020-10-12 15:34:51,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:51,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315388317] [2020-10-12 15:34:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:51,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:51,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:51,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:51,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:51,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:52,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:52,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:52,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:52,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:53,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:53,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:54,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:54,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:54,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:55,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:55,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:55,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:55,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:56,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:56,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:56,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:56,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:56,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:56,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:34:56,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 15:34:56,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:34:56,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:56,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:34:56,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:56,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:34:56,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:56,936 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 27 [2020-10-12 15:34:57,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:57,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:57,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:57,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:57,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:57,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:34:57,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:57,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:57,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315388317] [2020-10-12 15:34:57,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:34:57,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:34:57,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904619226] [2020-10-12 15:34:57,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:34:57,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:34:57,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:34:57,209 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand 15 states. [2020-10-12 15:34:57,625 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-12 15:34:58,390 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 15:35:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:00,368 INFO L93 Difference]: Finished difference Result 268 states and 348 transitions. [2020-10-12 15:35:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 15:35:00,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:35:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:00,376 INFO L225 Difference]: With dead ends: 268 [2020-10-12 15:35:00,376 INFO L226 Difference]: Without dead ends: 209 [2020-10-12 15:35:00,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=713, Invalid=2479, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 15:35:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-12 15:35:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 118. [2020-10-12 15:35:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 15:35:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 151 transitions. [2020-10-12 15:35:00,392 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 151 transitions. Word has length 34 [2020-10-12 15:35:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:00,392 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 151 transitions. [2020-10-12 15:35:00,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:35:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 151 transitions. [2020-10-12 15:35:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:35:00,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:00,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:00,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:35:00,393 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1567977570, now seen corresponding path program 1 times [2020-10-12 15:35:00,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:00,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976366572] [2020-10-12 15:35:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:00,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:05,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:05,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:35:05,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:35:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:35:05,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:35:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:35:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:35:05,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:05,727 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-12 15:35:05,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:05,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:05,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:05,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:05,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:05,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:05,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:05,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:05,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976366572] [2020-10-12 15:35:05,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:05,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:35:05,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825584866] [2020-10-12 15:35:05,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:35:05,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:35:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:35:05,958 INFO L87 Difference]: Start difference. First operand 118 states and 151 transitions. Second operand 15 states. [2020-10-12 15:35:06,454 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-12 15:35:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:07,368 INFO L93 Difference]: Finished difference Result 262 states and 324 transitions. [2020-10-12 15:35:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:35:07,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:35:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:07,370 INFO L225 Difference]: With dead ends: 262 [2020-10-12 15:35:07,371 INFO L226 Difference]: Without dead ends: 231 [2020-10-12 15:35:07,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:35:07,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-12 15:35:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-12 15:35:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 15:35:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-10-12 15:35:07,389 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 34 [2020-10-12 15:35:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:07,390 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-10-12 15:35:07,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:35:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-10-12 15:35:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:35:07,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:07,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:07,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:35:07,391 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:07,391 INFO L82 PathProgramCache]: Analyzing trace with hash 208876834, now seen corresponding path program 1 times [2020-10-12 15:35:07,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:07,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586858985] [2020-10-12 15:35:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:11,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:11,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:35:11,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 15:35:11,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4011 [2020-10-12 15:35:11,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:11,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:35:11,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:35:11,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:35:11,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:11,932 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2020-10-12 15:35:12,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:12,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:12,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:12,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:12,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:12,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:12,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:12,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:12,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586858985] [2020-10-12 15:35:12,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:12,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:35:12,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652533370] [2020-10-12 15:35:12,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:35:12,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:35:12,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:35:12,221 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 15 states. [2020-10-12 15:35:12,558 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-12 15:35:13,120 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-10-12 15:35:13,359 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-12 15:35:13,706 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-10-12 15:35:13,907 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-12 15:35:14,233 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-12 15:35:14,469 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-12 15:35:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:15,150 INFO L93 Difference]: Finished difference Result 254 states and 309 transitions. [2020-10-12 15:35:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:35:15,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:35:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:15,153 INFO L225 Difference]: With dead ends: 254 [2020-10-12 15:35:15,153 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 15:35:15,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:35:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 15:35:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 140. [2020-10-12 15:35:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 15:35:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-10-12 15:35:15,172 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 34 [2020-10-12 15:35:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:15,172 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-10-12 15:35:15,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:35:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-10-12 15:35:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:35:15,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:15,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:15,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:35:15,173 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:15,174 INFO L82 PathProgramCache]: Analyzing trace with hash 921551392, now seen corresponding path program 1 times [2020-10-12 15:35:15,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:15,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395971243] [2020-10-12 15:35:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:15,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:20,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:20,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:35:20,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:35:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:35:20,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:35:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:35:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:35:20,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:20,585 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-12 15:35:20,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:20,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:20,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:20,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:20,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:20,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:20,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:20,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:20,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:20,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:20,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:20,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395971243] [2020-10-12 15:35:20,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:20,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:35:20,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060256602] [2020-10-12 15:35:20,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:35:20,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:20,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:35:20,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:35:20,855 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 15 states. [2020-10-12 15:35:21,240 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-12 15:35:21,586 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-12 15:35:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:22,642 INFO L93 Difference]: Finished difference Result 278 states and 342 transitions. [2020-10-12 15:35:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:35:22,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:35:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:22,644 INFO L225 Difference]: With dead ends: 278 [2020-10-12 15:35:22,645 INFO L226 Difference]: Without dead ends: 247 [2020-10-12 15:35:22,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:35:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-12 15:35:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-10-12 15:35:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-12 15:35:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2020-10-12 15:35:22,665 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 34 [2020-10-12 15:35:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:22,665 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2020-10-12 15:35:22,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:35:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2020-10-12 15:35:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:35:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:22,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:22,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:35:22,666 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1596561500, now seen corresponding path program 1 times [2020-10-12 15:35:22,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:22,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501577499] [2020-10-12 15:35:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:22,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:22,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:22,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:22,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:26,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:26,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:35:26,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 15:35:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3886 [2020-10-12 15:35:26,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:35:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:35:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:35:26,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:27,238 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-10-12 15:35:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:27,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:27,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:27,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:27,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:27,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:27,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:27,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501577499] [2020-10-12 15:35:27,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:27,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:35:27,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396614679] [2020-10-12 15:35:27,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:35:27,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:35:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:35:27,641 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand 15 states. [2020-10-12 15:35:28,326 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-12 15:35:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:29,796 INFO L93 Difference]: Finished difference Result 320 states and 390 transitions. [2020-10-12 15:35:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:35:29,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:35:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:29,803 INFO L225 Difference]: With dead ends: 320 [2020-10-12 15:35:29,803 INFO L226 Difference]: Without dead ends: 318 [2020-10-12 15:35:29,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:35:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-12 15:35:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 134. [2020-10-12 15:35:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 15:35:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 169 transitions. [2020-10-12 15:35:29,825 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 169 transitions. Word has length 34 [2020-10-12 15:35:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:29,826 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 169 transitions. [2020-10-12 15:35:29,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:35:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 169 transitions. [2020-10-12 15:35:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:35:29,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:29,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:29,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:35:29,827 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash -972821976, now seen corresponding path program 1 times [2020-10-12 15:35:29,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:29,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207045958] [2020-10-12 15:35:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:29,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:29,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:29,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:30,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:30,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:30,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:31,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:31,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:32,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:32,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:32,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:32,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:35:32,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 15:35:32,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2647 [2020-10-12 15:35:32,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:32,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:35:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:35:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:35:32,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:32,811 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-12 15:35:32,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:32,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:32,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:32,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:32,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:32,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:32,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:32,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207045958] [2020-10-12 15:35:32,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:32,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:35:32,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19578041] [2020-10-12 15:35:32,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:35:32,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:35:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:35:32,941 INFO L87 Difference]: Start difference. First operand 134 states and 169 transitions. Second operand 13 states. [2020-10-12 15:35:33,332 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-12 15:35:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:34,898 INFO L93 Difference]: Finished difference Result 330 states and 409 transitions. [2020-10-12 15:35:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:35:34,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-12 15:35:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:34,902 INFO L225 Difference]: With dead ends: 330 [2020-10-12 15:35:34,902 INFO L226 Difference]: Without dead ends: 291 [2020-10-12 15:35:34,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:35:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-12 15:35:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 155. [2020-10-12 15:35:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 15:35:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 195 transitions. [2020-10-12 15:35:34,942 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 195 transitions. Word has length 35 [2020-10-12 15:35:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:34,943 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 195 transitions. [2020-10-12 15:35:34,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:35:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 195 transitions. [2020-10-12 15:35:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:35:34,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:34,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:34,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:35:34,945 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash 804032428, now seen corresponding path program 1 times [2020-10-12 15:35:34,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:34,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948194115] [2020-10-12 15:35:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:34,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:35,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:35,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:35,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:35,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:36,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1353 [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:35:36,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:36,622 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-12 15:35:36,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:36,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:36,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:36,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:36,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:36,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948194115] [2020-10-12 15:35:36,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:36,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:35:36,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195800270] [2020-10-12 15:35:36,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:35:36,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:35:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:35:36,834 INFO L87 Difference]: Start difference. First operand 155 states and 195 transitions. Second operand 12 states. [2020-10-12 15:35:37,262 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-12 15:35:37,403 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-12 15:35:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:38,241 INFO L93 Difference]: Finished difference Result 267 states and 328 transitions. [2020-10-12 15:35:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:35:38,243 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-12 15:35:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:38,245 INFO L225 Difference]: With dead ends: 267 [2020-10-12 15:35:38,245 INFO L226 Difference]: Without dead ends: 265 [2020-10-12 15:35:38,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:35:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-12 15:35:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 155. [2020-10-12 15:35:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 15:35:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 195 transitions. [2020-10-12 15:35:38,278 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 195 transitions. Word has length 35 [2020-10-12 15:35:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:38,278 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 195 transitions. [2020-10-12 15:35:38,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:35:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 195 transitions. [2020-10-12 15:35:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:35:38,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:38,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:38,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:35:38,279 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:38,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1733797418, now seen corresponding path program 1 times [2020-10-12 15:35:38,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:38,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106941580] [2020-10-12 15:35:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:39,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:39,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:35:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:39,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:39,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:39,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:39,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:39,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:39,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:39,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106941580] [2020-10-12 15:35:39,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:39,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:35:39,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712070739] [2020-10-12 15:35:39,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:35:39,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:39,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:35:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:35:39,644 INFO L87 Difference]: Start difference. First operand 155 states and 195 transitions. Second operand 11 states. [2020-10-12 15:35:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:40,585 INFO L93 Difference]: Finished difference Result 265 states and 325 transitions. [2020-10-12 15:35:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:35:40,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-12 15:35:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:40,588 INFO L225 Difference]: With dead ends: 265 [2020-10-12 15:35:40,588 INFO L226 Difference]: Without dead ends: 236 [2020-10-12 15:35:40,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:35:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-12 15:35:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 165. [2020-10-12 15:35:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 15:35:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 207 transitions. [2020-10-12 15:35:40,616 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 207 transitions. Word has length 35 [2020-10-12 15:35:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:40,616 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 207 transitions. [2020-10-12 15:35:40,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:35:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 207 transitions. [2020-10-12 15:35:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:35:40,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:40,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:40,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:35:40,618 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -784315474, now seen corresponding path program 1 times [2020-10-12 15:35:40,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:40,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093552877] [2020-10-12 15:35:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:40,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:40,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:40,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:35:40,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:35:40,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-12 15:35:40,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:35:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:35:40,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:41,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:41,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:41,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:41,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:41,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093552877] [2020-10-12 15:35:41,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:41,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:35:41,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097050845] [2020-10-12 15:35:41,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:35:41,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:35:41,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:35:41,134 INFO L87 Difference]: Start difference. First operand 165 states and 207 transitions. Second operand 10 states. [2020-10-12 15:35:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:41,930 INFO L93 Difference]: Finished difference Result 228 states and 280 transitions. [2020-10-12 15:35:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:35:41,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-12 15:35:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:41,932 INFO L225 Difference]: With dead ends: 228 [2020-10-12 15:35:41,932 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 15:35:41,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:35:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 15:35:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 165. [2020-10-12 15:35:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 15:35:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 207 transitions. [2020-10-12 15:35:41,960 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 207 transitions. Word has length 35 [2020-10-12 15:35:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:41,960 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 207 transitions. [2020-10-12 15:35:41,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:35:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 207 transitions. [2020-10-12 15:35:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:35:41,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:41,961 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:41,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:35:41,962 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash 844729302, now seen corresponding path program 1 times [2020-10-12 15:35:41,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:41,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867191442] [2020-10-12 15:35:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:42,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:42,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:42,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:43,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:43,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:47,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:47,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:35:47,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:35:47,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 15:35:47,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:35:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:35:47,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:47,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:47,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:47,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:47,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867191442] [2020-10-12 15:35:47,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:47,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:35:47,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996152582] [2020-10-12 15:35:47,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:35:47,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:47,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:35:47,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:35:47,492 INFO L87 Difference]: Start difference. First operand 165 states and 207 transitions. Second operand 13 states. [2020-10-12 15:35:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:48,599 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2020-10-12 15:35:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:35:48,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-12 15:35:48,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:48,602 INFO L225 Difference]: With dead ends: 302 [2020-10-12 15:35:48,602 INFO L226 Difference]: Without dead ends: 273 [2020-10-12 15:35:48,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:35:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-12 15:35:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 199. [2020-10-12 15:35:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 15:35:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 253 transitions. [2020-10-12 15:35:48,637 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 253 transitions. Word has length 36 [2020-10-12 15:35:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:48,637 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 253 transitions. [2020-10-12 15:35:48,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:35:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 253 transitions. [2020-10-12 15:35:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:35:48,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:48,638 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:48,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:35:48,639 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1673383590, now seen corresponding path program 1 times [2020-10-12 15:35:48,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:48,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890793946] [2020-10-12 15:35:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:48,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:48,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:51,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:52,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:53,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:53,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:53,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:35:53,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:35:53,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 15:35:53,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:53,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:35:53,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:35:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:35:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:53,950 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-12 15:35:54,601 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 80 [2020-10-12 15:35:55,308 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 100 [2020-10-12 15:35:55,637 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-12 15:35:55,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:55,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:55,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:55,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:55,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:55,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:55,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:55,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:55,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:55,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:55,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:55,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890793946] [2020-10-12 15:35:55,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:55,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:35:55,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962916613] [2020-10-12 15:35:55,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:35:55,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:35:55,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:35:55,948 INFO L87 Difference]: Start difference. First operand 199 states and 253 transitions. Second operand 17 states. [2020-10-12 15:35:56,460 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-12 15:35:57,214 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-10-12 15:35:57,571 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-12 15:35:57,932 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:35:58,456 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 15:35:58,817 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 15:35:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:59,774 INFO L93 Difference]: Finished difference Result 426 states and 520 transitions. [2020-10-12 15:35:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:35:59,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-12 15:35:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:59,777 INFO L225 Difference]: With dead ends: 426 [2020-10-12 15:35:59,778 INFO L226 Difference]: Without dead ends: 397 [2020-10-12 15:35:59,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:35:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-12 15:35:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 207. [2020-10-12 15:35:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-12 15:35:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 263 transitions. [2020-10-12 15:35:59,814 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 263 transitions. Word has length 36 [2020-10-12 15:35:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:59,814 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 263 transitions. [2020-10-12 15:35:59,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:35:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 263 transitions. [2020-10-12 15:35:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:35:59,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:59,815 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:59,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:35:59,816 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:59,816 INFO L82 PathProgramCache]: Analyzing trace with hash 193286102, now seen corresponding path program 2 times [2020-10-12 15:35:59,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:59,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555072674] [2020-10-12 15:35:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:59,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:00,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:00,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:00,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:00,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:01,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:01,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:03,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:03,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:36:03,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:36:03,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3171 [2020-10-12 15:36:03,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:03,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:36:03,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:03,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:36:03,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:03,361 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-12 15:36:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:03,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:03,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:03,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:03,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:03,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:03,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:03,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555072674] [2020-10-12 15:36:03,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:03,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:36:03,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937086703] [2020-10-12 15:36:03,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:36:03,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:36:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:36:03,560 INFO L87 Difference]: Start difference. First operand 207 states and 263 transitions. Second operand 14 states. [2020-10-12 15:36:04,130 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-12 15:36:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:04,716 INFO L93 Difference]: Finished difference Result 295 states and 366 transitions. [2020-10-12 15:36:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:36:04,717 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-12 15:36:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:04,719 INFO L225 Difference]: With dead ends: 295 [2020-10-12 15:36:04,719 INFO L226 Difference]: Without dead ends: 266 [2020-10-12 15:36:04,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:36:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-12 15:36:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 181. [2020-10-12 15:36:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 15:36:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 232 transitions. [2020-10-12 15:36:04,750 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 232 transitions. Word has length 36 [2020-10-12 15:36:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:04,751 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 232 transitions. [2020-10-12 15:36:04,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:36:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 232 transitions. [2020-10-12 15:36:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:04,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:04,752 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:04,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:36:04,752 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash -532670310, now seen corresponding path program 1 times [2020-10-12 15:36:04,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:04,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011513374] [2020-10-12 15:36:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:04,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:05,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:06,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:06,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:07,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:07,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:08,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:08,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:08,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:09,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:09,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:09,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:09,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:09,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 15:36:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 15:36:09,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:36:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:36:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:36:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:10,641 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-12 15:36:11,042 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 76 [2020-10-12 15:36:11,596 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 106 [2020-10-12 15:36:12,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:12,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:12,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:12,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:12,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:12,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:12,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:12,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:12,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011513374] [2020-10-12 15:36:12,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:12,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:36:12,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931213351] [2020-10-12 15:36:12,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:36:12,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:12,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:36:12,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:36:12,182 INFO L87 Difference]: Start difference. First operand 181 states and 232 transitions. Second operand 18 states. [2020-10-12 15:36:12,884 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-12 15:36:13,412 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 15:36:13,929 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 121 [2020-10-12 15:36:14,253 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2020-10-12 15:36:15,175 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-12 15:36:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:16,129 INFO L93 Difference]: Finished difference Result 383 states and 475 transitions. [2020-10-12 15:36:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 15:36:16,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-12 15:36:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:16,132 INFO L225 Difference]: With dead ends: 383 [2020-10-12 15:36:16,133 INFO L226 Difference]: Without dead ends: 354 [2020-10-12 15:36:16,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:36:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-12 15:36:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 201. [2020-10-12 15:36:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 15:36:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-10-12 15:36:16,167 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 37 [2020-10-12 15:36:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:16,167 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-10-12 15:36:16,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:36:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-10-12 15:36:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:16,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:16,168 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:16,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:36:16,168 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1244184094, now seen corresponding path program 1 times [2020-10-12 15:36:16,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:16,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194929344] [2020-10-12 15:36:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:16,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:16,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:16,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:16,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:16,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:17,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:20,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:20,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:21,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:21,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:21,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:21,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:36:21,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-12 15:36:21,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:36:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:36:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:36:21,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:21,699 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2020-10-12 15:36:22,543 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 72 [2020-10-12 15:36:23,075 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 76 [2020-10-12 15:36:23,696 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 101 [2020-10-12 15:36:24,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:24,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:24,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:24,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:24,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:24,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:24,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:24,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:24,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194929344] [2020-10-12 15:36:24,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:24,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:36:24,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531158480] [2020-10-12 15:36:24,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:36:24,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:36:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:36:24,225 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 17 states. [2020-10-12 15:36:24,970 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-10-12 15:36:25,519 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 15:36:26,041 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 117 [2020-10-12 15:36:26,352 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-10-12 15:36:26,879 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 15:36:27,302 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-12 15:36:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:27,901 INFO L93 Difference]: Finished difference Result 324 states and 404 transitions. [2020-10-12 15:36:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:36:27,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-12 15:36:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:27,904 INFO L225 Difference]: With dead ends: 324 [2020-10-12 15:36:27,904 INFO L226 Difference]: Without dead ends: 322 [2020-10-12 15:36:27,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:36:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-12 15:36:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 193. [2020-10-12 15:36:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 15:36:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 249 transitions. [2020-10-12 15:36:27,938 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 249 transitions. Word has length 37 [2020-10-12 15:36:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:27,939 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 249 transitions. [2020-10-12 15:36:27,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:36:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 249 transitions. [2020-10-12 15:36:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:27,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:27,939 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:27,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:36:27,940 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1333999382, now seen corresponding path program 1 times [2020-10-12 15:36:27,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:27,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845984950] [2020-10-12 15:36:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:27,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:28,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:28,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:28,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:30,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:30,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:31,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:32,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:32,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:32,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 15:36:32,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:36:32,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:36:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:36:32,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:33,388 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 15:36:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:33,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:33,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:33,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:33,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845984950] [2020-10-12 15:36:33,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:33,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:36:33,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952494404] [2020-10-12 15:36:33,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:36:33,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:36:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:36:33,868 INFO L87 Difference]: Start difference. First operand 193 states and 249 transitions. Second operand 17 states. [2020-10-12 15:36:34,739 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-12 15:36:35,201 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 15:36:35,843 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 15:36:36,025 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-12 15:36:36,279 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-12 15:36:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:37,032 INFO L93 Difference]: Finished difference Result 409 states and 512 transitions. [2020-10-12 15:36:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 15:36:37,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-12 15:36:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:37,035 INFO L225 Difference]: With dead ends: 409 [2020-10-12 15:36:37,035 INFO L226 Difference]: Without dead ends: 378 [2020-10-12 15:36:37,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=422, Invalid=1740, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 15:36:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-12 15:36:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 202. [2020-10-12 15:36:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 15:36:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 262 transitions. [2020-10-12 15:36:37,072 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 262 transitions. Word has length 37 [2020-10-12 15:36:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:37,072 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 262 transitions. [2020-10-12 15:36:37,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:36:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 262 transitions. [2020-10-12 15:36:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:37,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:37,073 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:37,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:36:37,073 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1184113510, now seen corresponding path program 1 times [2020-10-12 15:36:37,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:37,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682365800] [2020-10-12 15:36:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:37,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:37,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:37,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:37,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:38,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:38,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:38,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:42,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:42,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:42,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:36:42,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 15:36:42,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:36:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:36:42,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:42,568 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-12 15:36:43,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:43,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:43,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:43,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:43,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:43,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:43,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:43,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:43,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:43,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:43,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:36:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:43,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682365800] [2020-10-12 15:36:43,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:43,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:36:43,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650808977] [2020-10-12 15:36:43,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:36:43,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:43,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:36:43,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:36:43,216 INFO L87 Difference]: Start difference. First operand 202 states and 262 transitions. Second operand 16 states. [2020-10-12 15:36:43,866 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-12 15:36:44,102 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 15:36:44,506 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-12 15:36:45,228 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-12 15:36:45,528 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-12 15:36:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:46,615 INFO L93 Difference]: Finished difference Result 347 states and 433 transitions. [2020-10-12 15:36:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 15:36:46,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 15:36:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:46,618 INFO L225 Difference]: With dead ends: 347 [2020-10-12 15:36:46,618 INFO L226 Difference]: Without dead ends: 345 [2020-10-12 15:36:46,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:36:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-12 15:36:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 196. [2020-10-12 15:36:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 15:36:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 255 transitions. [2020-10-12 15:36:46,648 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 255 transitions. Word has length 37 [2020-10-12 15:36:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:46,648 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 255 transitions. [2020-10-12 15:36:46,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:36:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 255 transitions. [2020-10-12 15:36:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:46,649 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:36:46,649 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -470630696, now seen corresponding path program 1 times [2020-10-12 15:36:46,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:46,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008882610] [2020-10-12 15:36:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:46,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:46,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:47,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:47,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:47,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:48,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:51,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:51,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:51,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:36:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:36:51,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:36:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:36:51,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:52,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:52,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:52,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:52,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:52,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:52,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:52,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:52,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:52,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008882610] [2020-10-12 15:36:52,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:52,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:36:52,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373695971] [2020-10-12 15:36:52,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:36:52,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:36:52,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:36:52,316 INFO L87 Difference]: Start difference. First operand 196 states and 255 transitions. Second operand 15 states. [2020-10-12 15:36:53,045 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-12 15:36:53,320 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-12 15:36:54,477 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 15:36:54,669 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-12 15:36:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:54,789 INFO L93 Difference]: Finished difference Result 348 states and 438 transitions. [2020-10-12 15:36:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:36:54,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 15:36:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:54,792 INFO L225 Difference]: With dead ends: 348 [2020-10-12 15:36:54,792 INFO L226 Difference]: Without dead ends: 346 [2020-10-12 15:36:54,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:36:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-12 15:36:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 221. [2020-10-12 15:36:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-12 15:36:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 289 transitions. [2020-10-12 15:36:54,828 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 289 transitions. Word has length 37 [2020-10-12 15:36:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:54,828 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 289 transitions. [2020-10-12 15:36:54,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:36:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 289 transitions. [2020-10-12 15:36:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:36:54,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:54,829 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:54,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:36:54,830 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:54,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:54,830 INFO L82 PathProgramCache]: Analyzing trace with hash -321632664, now seen corresponding path program 1 times [2020-10-12 15:36:54,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:54,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72176715] [2020-10-12 15:36:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:54,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:56,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:56,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:59,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:59,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:36:59,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:36:59,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:36:59,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:59,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:36:59,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:59,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:36:59,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:00,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:00,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:00,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:00,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:00,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:00,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:00,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:00,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72176715] [2020-10-12 15:37:00,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:00,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:37:00,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940842859] [2020-10-12 15:37:00,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:37:00,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:37:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:37:00,250 INFO L87 Difference]: Start difference. First operand 221 states and 289 transitions. Second operand 15 states. [2020-10-12 15:37:00,684 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-12 15:37:01,208 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 15:37:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:02,275 INFO L93 Difference]: Finished difference Result 445 states and 559 transitions. [2020-10-12 15:37:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:37:02,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-12 15:37:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:02,278 INFO L225 Difference]: With dead ends: 445 [2020-10-12 15:37:02,278 INFO L226 Difference]: Without dead ends: 416 [2020-10-12 15:37:02,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:37:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-12 15:37:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 237. [2020-10-12 15:37:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 15:37:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 310 transitions. [2020-10-12 15:37:02,329 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 310 transitions. Word has length 38 [2020-10-12 15:37:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:02,329 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 310 transitions. [2020-10-12 15:37:02,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:37:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 310 transitions. [2020-10-12 15:37:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:37:02,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:02,330 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:02,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:37:02,330 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:02,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1455221740, now seen corresponding path program 1 times [2020-10-12 15:37:02,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:02,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138555539] [2020-10-12 15:37:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:02,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:02,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:02,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:02,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:03,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:03,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:04,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:06,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:06,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:07,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:07,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:07,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:37:07,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:37:07,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:37:07,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:07,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:37:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:37:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:37:07,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:07,763 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-10-12 15:37:08,768 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 68 [2020-10-12 15:37:09,817 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 185 DAG size of output: 74 [2020-10-12 15:37:10,829 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 76 [2020-10-12 15:37:11,099 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2020-10-12 15:37:11,319 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2020-10-12 15:37:11,495 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2020-10-12 15:37:12,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:12,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:12,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:12,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:12,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:12,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:37:12,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:12,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:12,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138555539] [2020-10-12 15:37:12,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:12,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:37:12,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417362393] [2020-10-12 15:37:12,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:37:12,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:12,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:37:12,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:37:12,211 INFO L87 Difference]: Start difference. First operand 237 states and 310 transitions. Second operand 17 states. [2020-10-12 15:37:13,105 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-12 15:37:13,670 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 87 [2020-10-12 15:37:14,433 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 15:37:14,773 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-12 15:37:14,988 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:37:15,323 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-12 15:37:15,584 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-12 15:37:15,970 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-12 15:37:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:16,354 INFO L93 Difference]: Finished difference Result 367 states and 462 transitions. [2020-10-12 15:37:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:37:16,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 15:37:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:16,357 INFO L225 Difference]: With dead ends: 367 [2020-10-12 15:37:16,358 INFO L226 Difference]: Without dead ends: 365 [2020-10-12 15:37:16,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:37:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-12 15:37:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 229. [2020-10-12 15:37:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-12 15:37:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 300 transitions. [2020-10-12 15:37:16,392 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 300 transitions. Word has length 38 [2020-10-12 15:37:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:16,392 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 300 transitions. [2020-10-12 15:37:16,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:37:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 300 transitions. [2020-10-12 15:37:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:37:16,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:16,393 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:16,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:37:16,393 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:16,394 INFO L82 PathProgramCache]: Analyzing trace with hash 122632656, now seen corresponding path program 1 times [2020-10-12 15:37:16,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:16,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888715314] [2020-10-12 15:37:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:16,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:16,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:16,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:16,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:18,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:20,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:20,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:21,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:21,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:37:21,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 15:37:21,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 15:37:21,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:37:21,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:37:21,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:37:21,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:22,275 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 64 [2020-10-12 15:37:23,058 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 73 [2020-10-12 15:37:23,569 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 93 [2020-10-12 15:37:23,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:23,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:23,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:23,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:23,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:23,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:23,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:23,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:23,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:23,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888715314] [2020-10-12 15:37:23,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:23,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:37:23,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291459735] [2020-10-12 15:37:23,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:37:23,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:37:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:37:23,983 INFO L87 Difference]: Start difference. First operand 229 states and 300 transitions. Second operand 18 states. [2020-10-12 15:37:24,828 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:37:25,451 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 15:37:25,998 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 105 [2020-10-12 15:37:26,276 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-12 15:37:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:28,209 INFO L93 Difference]: Finished difference Result 497 states and 631 transitions. [2020-10-12 15:37:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 15:37:28,210 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-12 15:37:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:28,212 INFO L225 Difference]: With dead ends: 497 [2020-10-12 15:37:28,212 INFO L226 Difference]: Without dead ends: 468 [2020-10-12 15:37:28,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=343, Invalid=2009, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:37:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-12 15:37:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 237. [2020-10-12 15:37:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 15:37:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 312 transitions. [2020-10-12 15:37:28,255 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 312 transitions. Word has length 38 [2020-10-12 15:37:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:28,255 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 312 transitions. [2020-10-12 15:37:28,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:37:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 312 transitions. [2020-10-12 15:37:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:37:28,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:28,256 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:28,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:37:28,256 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1899487060, now seen corresponding path program 1 times [2020-10-12 15:37:28,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:28,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918564971] [2020-10-12 15:37:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:28,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:28,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:28,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:29,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:31,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:31,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:37:31,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:37:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3592 [2020-10-12 15:37:31,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:31,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:37:31,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:37:31,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:37:31,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:32,587 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 68 [2020-10-12 15:37:33,266 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 73 [2020-10-12 15:37:33,737 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 90 [2020-10-12 15:37:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:34,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:34,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:34,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:34,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:34,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:34,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:34,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:34,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918564971] [2020-10-12 15:37:34,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:34,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:37:34,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378631815] [2020-10-12 15:37:34,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:37:34,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:34,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:37:34,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:37:34,154 INFO L87 Difference]: Start difference. First operand 237 states and 312 transitions. Second operand 17 states. [2020-10-12 15:37:34,861 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-12 15:37:35,278 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 79 [2020-10-12 15:37:35,597 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-12 15:37:36,080 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 15:37:36,624 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 105 [2020-10-12 15:37:36,908 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-12 15:37:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:38,521 INFO L93 Difference]: Finished difference Result 449 states and 572 transitions. [2020-10-12 15:37:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:37:38,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 15:37:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:38,525 INFO L225 Difference]: With dead ends: 449 [2020-10-12 15:37:38,525 INFO L226 Difference]: Without dead ends: 447 [2020-10-12 15:37:38,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:37:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-12 15:37:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 246. [2020-10-12 15:37:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-12 15:37:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 325 transitions. [2020-10-12 15:37:38,563 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 325 transitions. Word has length 38 [2020-10-12 15:37:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:38,563 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 325 transitions. [2020-10-12 15:37:38,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:37:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 325 transitions. [2020-10-12 15:37:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:37:38,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:38,564 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:38,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:37:38,565 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1465715246, now seen corresponding path program 1 times [2020-10-12 15:37:38,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:38,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168667698] [2020-10-12 15:37:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:38,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:38,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:38,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:39,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:40,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2406 [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:37:40,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:41,186 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-12 15:37:41,343 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-12 15:37:41,489 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-12 15:37:41,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:41,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:41,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:41,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:41,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:41,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:41,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:41,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168667698] [2020-10-12 15:37:41,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:41,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:37:41,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414376035] [2020-10-12 15:37:41,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:37:41,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:41,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:37:41,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:37:41,659 INFO L87 Difference]: Start difference. First operand 246 states and 325 transitions. Second operand 13 states. [2020-10-12 15:37:41,875 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-12 15:37:42,256 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-12 15:37:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:43,561 INFO L93 Difference]: Finished difference Result 407 states and 521 transitions. [2020-10-12 15:37:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:37:43,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:37:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:43,564 INFO L225 Difference]: With dead ends: 407 [2020-10-12 15:37:43,564 INFO L226 Difference]: Without dead ends: 376 [2020-10-12 15:37:43,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:37:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-12 15:37:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 215. [2020-10-12 15:37:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-12 15:37:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 282 transitions. [2020-10-12 15:37:43,596 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 282 transitions. Word has length 38 [2020-10-12 15:37:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:43,596 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 282 transitions. [2020-10-12 15:37:43,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:37:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 282 transitions. [2020-10-12 15:37:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:37:43,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:43,597 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:43,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:37:43,598 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash 311139158, now seen corresponding path program 1 times [2020-10-12 15:37:43,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:43,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856663730] [2020-10-12 15:37:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:43,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:43,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:44,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:44,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:37:44,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:37:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-12 15:37:44,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:37:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:37:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:44,207 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-12 15:37:44,331 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-12 15:37:44,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:44,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:44,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:44,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856663730] [2020-10-12 15:37:44,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:44,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:37:44,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70238489] [2020-10-12 15:37:44,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:37:44,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:37:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:37:44,686 INFO L87 Difference]: Start difference. First operand 215 states and 282 transitions. Second operand 12 states. [2020-10-12 15:37:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:45,761 INFO L93 Difference]: Finished difference Result 315 states and 405 transitions. [2020-10-12 15:37:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:37:45,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-12 15:37:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:45,764 INFO L225 Difference]: With dead ends: 315 [2020-10-12 15:37:45,764 INFO L226 Difference]: Without dead ends: 313 [2020-10-12 15:37:45,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:37:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-12 15:37:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 215. [2020-10-12 15:37:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-12 15:37:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 280 transitions. [2020-10-12 15:37:45,795 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 280 transitions. Word has length 38 [2020-10-12 15:37:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:45,795 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 280 transitions. [2020-10-12 15:37:45,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:37:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 280 transitions. [2020-10-12 15:37:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:37:45,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:45,796 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:45,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:37:45,797 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:45,797 INFO L82 PathProgramCache]: Analyzing trace with hash 140054882, now seen corresponding path program 2 times [2020-10-12 15:37:45,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:45,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670459873] [2020-10-12 15:37:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:45,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:46,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:46,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:48,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:48,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:49,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:50,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:50,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:37:50,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:37:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-12 15:37:50,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:37:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:37:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:51,147 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-12 15:37:51,284 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-12 15:37:51,412 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 15:37:51,563 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-12 15:37:51,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:51,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:51,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:51,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:51,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:51,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:51,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:51,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:51,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670459873] [2020-10-12 15:37:51,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:51,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:37:51,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678257197] [2020-10-12 15:37:51,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:37:51,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:51,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:37:51,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:37:51,924 INFO L87 Difference]: Start difference. First operand 215 states and 280 transitions. Second operand 15 states. [2020-10-12 15:37:52,524 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-12 15:37:52,811 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-12 15:37:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:53,642 INFO L93 Difference]: Finished difference Result 334 states and 422 transitions. [2020-10-12 15:37:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:37:53,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-12 15:37:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:53,645 INFO L225 Difference]: With dead ends: 334 [2020-10-12 15:37:53,645 INFO L226 Difference]: Without dead ends: 305 [2020-10-12 15:37:53,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:37:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-12 15:37:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 239. [2020-10-12 15:37:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-12 15:37:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 310 transitions. [2020-10-12 15:37:53,699 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 310 transitions. Word has length 39 [2020-10-12 15:37:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:53,699 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 310 transitions. [2020-10-12 15:37:53,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:37:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 310 transitions. [2020-10-12 15:37:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:37:53,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:53,701 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:53,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:37:53,701 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1916909286, now seen corresponding path program 2 times [2020-10-12 15:37:53,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:53,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974912919] [2020-10-12 15:37:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:53,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:54,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:54,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:56,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:58,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:58,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:37:58,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:37:58,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 15:37:58,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:58,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:37:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:37:58,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:59,085 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-12 15:37:59,211 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-12 15:37:59,343 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-10-12 15:37:59,691 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-12 15:37:59,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:59,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:59,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:59,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:59,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:59,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:59,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:59,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:59,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:59,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:59,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974912919] [2020-10-12 15:37:59,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:59,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:37:59,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009957044] [2020-10-12 15:37:59,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:37:59,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:59,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:37:59,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:37:59,919 INFO L87 Difference]: Start difference. First operand 239 states and 310 transitions. Second operand 16 states. [2020-10-12 15:38:00,349 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-12 15:38:00,585 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-12 15:38:00,795 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-12 15:38:01,047 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-12 15:38:01,281 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-12 15:38:01,577 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-12 15:38:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:02,078 INFO L93 Difference]: Finished difference Result 399 states and 506 transitions. [2020-10-12 15:38:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:38:02,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-12 15:38:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:02,081 INFO L225 Difference]: With dead ends: 399 [2020-10-12 15:38:02,081 INFO L226 Difference]: Without dead ends: 370 [2020-10-12 15:38:02,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:38:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-12 15:38:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 245. [2020-10-12 15:38:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-12 15:38:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 320 transitions. [2020-10-12 15:38:02,126 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 320 transitions. Word has length 39 [2020-10-12 15:38:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:02,126 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 320 transitions. [2020-10-12 15:38:02,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:38:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 320 transitions. [2020-10-12 15:38:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:38:02,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:02,127 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:02,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:38:02,128 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1654662750, now seen corresponding path program 2 times [2020-10-12 15:38:02,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:02,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739940480] [2020-10-12 15:38:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:02,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:02,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:03,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:04,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:04,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking...