/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:26:06,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:26:06,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:26:06,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:26:06,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:26:06,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:26:06,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:26:06,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:26:06,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:26:06,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:26:06,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:26:06,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:26:06,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:26:06,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:26:06,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:26:06,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:26:06,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:26:06,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:26:06,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:26:06,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:26:06,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:26:06,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:26:06,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:26:06,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:26:06,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:26:06,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:26:06,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:26:06,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:26:06,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:26:06,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:26:06,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:26:06,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:26:06,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:26:06,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:26:06,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:26:06,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:26:06,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:26:06,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:26:06,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:26:06,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:26:06,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:26:06,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:26:06,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:26:06,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:26:06,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:26:06,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:26:06,738 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:26:06,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:26:06,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:26:06,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:26:06,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:26:06,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:26:06,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:26:06,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:26:06,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:26:06,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:26:06,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:26:06,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:26:06,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:26:06,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:26:06,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:26:06,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:26:06,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:26:06,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:26:06,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:26:06,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:26:06,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:26:06,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:26:06,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:26:06,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:26:06,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:26:06,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:26:07,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:26:07,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:26:07,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:26:07,100 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:26:07,102 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:26:07,103 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind.c [2020-10-13 04:26:07,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ad1b550/9e6259ff2e6a4765919c7cc93df1d5b0/FLAGa88db1653 [2020-10-13 04:26:07,630 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:26:07,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind.c [2020-10-13 04:26:07,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ad1b550/9e6259ff2e6a4765919c7cc93df1d5b0/FLAGa88db1653 [2020-10-13 04:26:07,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8ad1b550/9e6259ff2e6a4765919c7cc93df1d5b0 [2020-10-13 04:26:07,999 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:26:08,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:26:08,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:08,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:26:08,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:26:08,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:07" (1/1) ... [2020-10-13 04:26:08,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118e5697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08, skipping insertion in model container [2020-10-13 04:26:08,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:07" (1/1) ... [2020-10-13 04:26:08,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:26:08,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:26:08,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,218 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:26:08,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,254 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:26:08,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08 WrapperNode [2020-10-13 04:26:08,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:08,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:26:08,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:26:08,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:26:08,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:26:08,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:26:08,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:26:08,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:26:08,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:26:08,449 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:26:08,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:26:08,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:26:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:26:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:26:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:26:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:26:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:26:08,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:26:08,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:26:08,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:26:08,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:26:08,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:26:08,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:26:08,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:26:08,702 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:26:08,702 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 04:26:08,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:08 BoogieIcfgContainer [2020-10-13 04:26:08,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:26:08,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:26:08,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:26:08,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:26:08,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:26:07" (1/3) ... [2020-10-13 04:26:08,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e7bdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:08, skipping insertion in model container [2020-10-13 04:26:08,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (2/3) ... [2020-10-13 04:26:08,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e7bdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:08, skipping insertion in model container [2020-10-13 04:26:08,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:08" (3/3) ... [2020-10-13 04:26:08,733 INFO L109 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2020-10-13 04:26:08,753 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:26:08,767 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:26:08,782 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:26:08,802 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:26:08,802 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:26:08,802 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:26:08,802 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:26:08,802 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:26:08,803 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:26:08,803 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:26:08,803 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:26:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 04:26:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:26:08,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:08,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:08,828 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:08,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1594784639, now seen corresponding path program 1 times [2020-10-13 04:26:08,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:08,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708665985] [2020-10-13 04:26:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:08,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 04:26:09,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:09,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-13 04:26:09,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:26:09,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:09,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:26:09,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:26:09,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:09,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:09,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:26:09,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:09,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:09,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:09,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:09,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708665985] [2020-10-13 04:26:09,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:26:09,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:26:09,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665344716] [2020-10-13 04:26:09,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:26:09,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:09,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:26:09,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:09,448 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-13 04:26:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:09,572 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-10-13 04:26:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:26:09,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 04:26:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:09,583 INFO L225 Difference]: With dead ends: 49 [2020-10-13 04:26:09,584 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:26:09,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:26:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 04:26:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:26:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 04:26:09,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2020-10-13 04:26:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:09,628 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 04:26:09,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:26:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 04:26:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:26:09,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:09,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:09,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:26:09,630 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash -973616762, now seen corresponding path program 1 times [2020-10-13 04:26:09,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:09,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347536569] [2020-10-13 04:26:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:26:09,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:09,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-13 04:26:09,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:26:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:10,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:10,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:10,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:10,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347536569] [2020-10-13 04:26:10,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:10,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:26:10,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182991584] [2020-10-13 04:26:10,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:26:10,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:26:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:10,022 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-13 04:26:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:10,125 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-13 04:26:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:26:10,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 04:26:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:10,127 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:26:10,127 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 04:26:10,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 04:26:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 04:26:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:26:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 04:26:10,135 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-13 04:26:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:10,136 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 04:26:10,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:26:10,136 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 04:26:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:26:10,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:10,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:10,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:26:10,138 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:10,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1377375713, now seen corresponding path program 2 times [2020-10-13 04:26:10,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:10,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144450200] [2020-10-13 04:26:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:26:10,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:10,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-13 04:26:10,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:26:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:10,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:10,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:26:10,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:10,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:10,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144450200] [2020-10-13 04:26:10,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:10,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:26:10,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040850151] [2020-10-13 04:26:10,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:26:10,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:26:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:26:10,667 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 04:26:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:10,826 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-13 04:26:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:26:10,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 04:26:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:10,830 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:26:10,830 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:26:10,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:26:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-13 04:26:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:26:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 04:26:10,844 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-13 04:26:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:10,845 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 04:26:10,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:26:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 04:26:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:26:10,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:10,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:10,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:26:10,847 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:10,847 INFO L82 PathProgramCache]: Analyzing trace with hash 679907117, now seen corresponding path program 1 times [2020-10-13 04:26:10,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:10,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957059957] [2020-10-13 04:26:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:26:11,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:11,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-13 04:26:11,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:26:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:26:11,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:11,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:11,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:11,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:11,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:11,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:11,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:11,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957059957] [2020-10-13 04:26:11,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:11,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:26:11,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894855815] [2020-10-13 04:26:11,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:26:11,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:26:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:11,198 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-10-13 04:26:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:11,490 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-13 04:26:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:11,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-13 04:26:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:11,492 INFO L225 Difference]: With dead ends: 43 [2020-10-13 04:26:11,492 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:26:11,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:26:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-13 04:26:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:26:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 04:26:11,502 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2020-10-13 04:26:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:11,503 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 04:26:11,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:26:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 04:26:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:26:11,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:11,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:11,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:26:11,505 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash 443111142, now seen corresponding path program 3 times [2020-10-13 04:26:11,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:11,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159861761] [2020-10-13 04:26:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:26:12,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:12,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-13 04:26:12,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:26:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:26:12,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:12,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:26:12,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:12,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:12,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:12,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:12,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159861761] [2020-10-13 04:26:12,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:12,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:26:12,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836615116] [2020-10-13 04:26:12,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:26:12,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:26:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:12,100 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-10-13 04:26:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:12,314 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-13 04:26:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:26:12,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 04:26:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:12,319 INFO L225 Difference]: With dead ends: 59 [2020-10-13 04:26:12,320 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:26:12,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:26:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-13 04:26:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:26:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 04:26:12,343 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 22 [2020-10-13 04:26:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:12,344 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 04:26:12,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:26:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 04:26:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:26:12,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:12,347 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:12,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:26:12,347 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:12,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1280424774, now seen corresponding path program 2 times [2020-10-13 04:26:12,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:12,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129959673] [2020-10-13 04:26:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:26:12,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:12,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 04:26:12,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:26:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:26:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:12,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:12,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:12,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:12,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:12,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:12,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129959673] [2020-10-13 04:26:12,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:12,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:26:12,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628329972] [2020-10-13 04:26:12,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:26:12,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:26:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:12,750 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 11 states. [2020-10-13 04:26:13,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:13,130 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-13 04:26:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:26:13,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-13 04:26:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:13,132 INFO L225 Difference]: With dead ends: 59 [2020-10-13 04:26:13,133 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:26:13,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:26:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:26:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-13 04:26:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:26:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 04:26:13,142 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2020-10-13 04:26:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:13,142 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 04:26:13,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:26:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 04:26:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:26:13,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:13,144 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:13,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:26:13,144 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2014961855, now seen corresponding path program 4 times [2020-10-13 04:26:13,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:13,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574618363] [2020-10-13 04:26:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:13,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:14,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:26:14,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:26:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-13 04:26:14,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:26:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:26:14,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:14,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:14,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:14,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:14,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:14,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:26:14,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:14,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:14,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574618363] [2020-10-13 04:26:14,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:14,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:26:14,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660746141] [2020-10-13 04:26:14,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:26:14,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:14,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:26:14,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:26:14,143 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2020-10-13 04:26:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:14,357 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-13 04:26:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:26:14,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 04:26:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:14,359 INFO L225 Difference]: With dead ends: 69 [2020-10-13 04:26:14,359 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 04:26:14,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 04:26:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-10-13 04:26:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:26:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 04:26:14,368 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 25 [2020-10-13 04:26:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:14,369 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 04:26:14,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:26:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 04:26:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:26:14,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:14,370 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:14,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:26:14,371 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1531810675, now seen corresponding path program 3 times [2020-10-13 04:26:14,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:14,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627954304] [2020-10-13 04:26:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:14,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:14,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:26:14,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:14,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-13 04:26:14,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:14,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:26:14,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:14,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:26:14,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:14,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:14,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:14,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:14,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:14,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:14,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:14,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:14,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627954304] [2020-10-13 04:26:14,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:14,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:26:14,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107942568] [2020-10-13 04:26:14,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:26:14,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:26:14,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:26:14,988 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 14 states. [2020-10-13 04:26:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:15,777 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-13 04:26:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:26:15,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-13 04:26:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:15,780 INFO L225 Difference]: With dead ends: 71 [2020-10-13 04:26:15,780 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:26:15,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:26:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:26:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 41. [2020-10-13 04:26:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:26:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-13 04:26:15,808 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2020-10-13 04:26:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:15,809 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-13 04:26:15,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:26:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-13 04:26:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:26:15,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:15,815 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] [2020-10-13 04:26:15,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:26:15,816 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:15,817 INFO L82 PathProgramCache]: Analyzing trace with hash -91295004, now seen corresponding path program 1 times [2020-10-13 04:26:15,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:15,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969273645] [2020-10-13 04:26:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:15,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:15,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:15,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:26:15,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:15,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-13 04:26:15,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:26:15,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:15,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:26:15,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:16,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:16,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:16,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:16,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:16,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:16,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:16,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:16,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:16,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 04:26:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:16,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:16,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:16,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:26:16,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:16,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:16,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969273645] [2020-10-13 04:26:16,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:16,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:26:16,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082845514] [2020-10-13 04:26:16,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:26:16,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:16,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:26:16,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:16,060 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2020-10-13 04:26:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:16,221 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-13 04:26:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:26:16,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-13 04:26:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:16,223 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:26:16,223 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:26:16,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:26:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 04:26:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:26:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 04:26:16,242 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-10-13 04:26:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:16,243 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 04:26:16,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:26:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 04:26:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:26:16,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:16,251 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:16,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:26:16,252 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:16,252 INFO L82 PathProgramCache]: Analyzing trace with hash 991124550, now seen corresponding path program 5 times [2020-10-13 04:26:16,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:16,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246548241] [2020-10-13 04:26:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:16,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:18,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:26:18,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:26:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2554 [2020-10-13 04:26:18,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:26:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:26:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:18,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:18,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:18,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:18,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:18,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:26:18,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:18,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:18,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:18,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246548241] [2020-10-13 04:26:18,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:18,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:26:18,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930046136] [2020-10-13 04:26:18,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:26:18,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:26:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:18,942 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2020-10-13 04:26:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:19,199 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-13 04:26:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:26:19,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-13 04:26:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:19,201 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:26:19,201 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:26:19,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:26:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2020-10-13 04:26:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:26:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-13 04:26:19,213 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2020-10-13 04:26:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:19,214 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-13 04:26:19,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:26:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-13 04:26:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:26:19,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:19,218 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:19,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:26:19,219 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1088971238, now seen corresponding path program 4 times [2020-10-13 04:26:19,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:19,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860723689] [2020-10-13 04:26:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:19,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:19,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:26:19,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:26:19,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-13 04:26:19,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:26:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:19,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:26:19,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:20,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:20,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:20,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:20,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:20,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:20,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:20,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:20,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860723689] [2020-10-13 04:26:20,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:20,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:26:20,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85008065] [2020-10-13 04:26:20,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:26:20,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:26:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:20,337 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 15 states. [2020-10-13 04:26:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:20,952 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-10-13 04:26:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:26:20,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-13 04:26:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:20,954 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:26:20,954 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 04:26:20,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:26:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 04:26:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2020-10-13 04:26:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:26:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 04:26:20,971 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2020-10-13 04:26:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:20,973 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 04:26:20,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:26:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 04:26:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:26:20,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:20,976 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:20,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:26:20,976 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1629287933, now seen corresponding path program 2 times [2020-10-13 04:26:20,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:20,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587040132] [2020-10-13 04:26:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:21,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:26:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-13 04:26:21,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:26:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:21,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:26:21,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:26:21,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:21,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:21,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:21,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:21,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:21,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:21,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:21,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:21,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:21,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:21,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 04:26:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:21,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:21,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:21,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:21,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 04:26:21,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:21,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:21,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:21,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:21,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587040132] [2020-10-13 04:26:21,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:21,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:26:21,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386193551] [2020-10-13 04:26:21,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:26:21,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:26:21,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:21,766 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 17 states. [2020-10-13 04:26:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:22,485 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-10-13 04:26:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:26:22,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-13 04:26:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:22,487 INFO L225 Difference]: With dead ends: 63 [2020-10-13 04:26:22,488 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:26:22,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:26:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:26:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-10-13 04:26:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 04:26:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-13 04:26:22,499 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 31 [2020-10-13 04:26:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:22,499 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-13 04:26:22,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:26:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-13 04:26:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:26:22,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:22,502 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:22,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:26:22,503 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1583259809, now seen corresponding path program 6 times [2020-10-13 04:26:22,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:22,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199672292] [2020-10-13 04:26:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:22,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:24,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:26:24,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 04:26:24,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-13 04:26:24,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:24,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:26:24,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:24,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:26:24,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:24,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:24,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:24,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:24,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:24,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:24,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:24,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:24,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199672292] [2020-10-13 04:26:24,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:24,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:26:24,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771608814] [2020-10-13 04:26:24,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:26:24,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:26:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:24,455 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 11 states. [2020-10-13 04:26:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:24,715 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-10-13 04:26:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:24,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-13 04:26:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:24,718 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:26:24,718 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:26:24,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:26:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2020-10-13 04:26:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:26:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-13 04:26:24,740 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 31 [2020-10-13 04:26:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:24,740 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-13 04:26:24,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:26:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-13 04:26:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:26:24,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:24,743 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:24,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:26:24,744 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1407532563, now seen corresponding path program 5 times [2020-10-13 04:26:24,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:24,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071971647] [2020-10-13 04:26:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:24,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:25,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:25,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:26:25,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:26:25,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-13 04:26:25,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:25,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:26:25,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:25,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:26:25,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:26,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:26,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:26,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:26,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:26,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:26,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:26,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:26,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:26,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:26,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:26,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:26,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071971647] [2020-10-13 04:26:26,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:26,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:26:26,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920891225] [2020-10-13 04:26:26,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:26:26,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:26:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:26,055 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 17 states. [2020-10-13 04:26:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:27,233 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2020-10-13 04:26:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:26:27,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-13 04:26:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:27,235 INFO L225 Difference]: With dead ends: 92 [2020-10-13 04:26:27,235 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 04:26:27,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:26:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 04:26:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2020-10-13 04:26:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 04:26:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-13 04:26:27,250 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 32 [2020-10-13 04:26:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:27,250 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-13 04:26:27,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:26:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-13 04:26:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:26:27,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:27,251 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:27,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:26:27,252 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:27,252 INFO L82 PathProgramCache]: Analyzing trace with hash -919113660, now seen corresponding path program 3 times [2020-10-13 04:26:27,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:27,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674884596] [2020-10-13 04:26:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:27,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:27,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:27,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:27,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:26:27,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:26:27,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-13 04:26:27,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:26:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:26:27,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:28,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:28,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:28,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:28,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:28,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:28,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:28,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:28,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:28,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:28,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:28,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 04:26:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:28,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:28,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:28,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:28,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 04:26:28,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:28,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:28,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:28,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:28,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:28,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674884596] [2020-10-13 04:26:28,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:28,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:26:28,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24215191] [2020-10-13 04:26:28,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:26:28,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:28,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:26:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:26:28,368 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 18 states. [2020-10-13 04:26:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:29,296 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-13 04:26:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:26:29,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-13 04:26:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:29,298 INFO L225 Difference]: With dead ends: 86 [2020-10-13 04:26:29,298 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:26:29,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:26:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:26:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-10-13 04:26:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:26:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-13 04:26:29,316 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 34 [2020-10-13 04:26:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:29,317 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-13 04:26:29,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:26:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-13 04:26:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:26:29,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:29,319 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:29,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:26:29,320 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash 163305894, now seen corresponding path program 7 times [2020-10-13 04:26:29,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:29,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347537636] [2020-10-13 04:26:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:29,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:30,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:30,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:30,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:32,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:26:32,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 04:26:32,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2837 [2020-10-13 04:26:32,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:32,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:26:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:26:32,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:32,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:32,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:32,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:32,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:32,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:32,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347537636] [2020-10-13 04:26:32,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:32,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:26:32,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976254291] [2020-10-13 04:26:32,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:26:32,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:26:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:32,272 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 12 states. [2020-10-13 04:26:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:32,548 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-13 04:26:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:26:32,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-13 04:26:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:32,551 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:26:32,551 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:26:32,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:26:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2020-10-13 04:26:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:26:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 04:26:32,571 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 34 [2020-10-13 04:26:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:32,572 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 04:26:32,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:26:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 04:26:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:26:32,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:32,573 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:32,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:26:32,573 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1196396678, now seen corresponding path program 6 times [2020-10-13 04:26:32,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:32,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066193410] [2020-10-13 04:26:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:33,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:33,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:26:33,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:26:33,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-13 04:26:33,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:26:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:33,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:26:33,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:34,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:34,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:34,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:34,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:34,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:34,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:34,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066193410] [2020-10-13 04:26:34,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:34,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:26:34,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649804702] [2020-10-13 04:26:34,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:26:34,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:26:34,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:34,052 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 19 states. [2020-10-13 04:26:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:35,314 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2020-10-13 04:26:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:26:35,314 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-13 04:26:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:35,315 INFO L225 Difference]: With dead ends: 112 [2020-10-13 04:26:35,316 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 04:26:35,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:26:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 04:26:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2020-10-13 04:26:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 04:26:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-10-13 04:26:35,333 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 35 [2020-10-13 04:26:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:35,333 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-10-13 04:26:35,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:26:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-10-13 04:26:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:26:35,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:35,334 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:35,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:26:35,335 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:35,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1785920669, now seen corresponding path program 4 times [2020-10-13 04:26:35,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:35,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389024640] [2020-10-13 04:26:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:35,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:35,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:35,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:36,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:26:36,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:26:36,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-13 04:26:36,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:26:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:26:36,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:36,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:36,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:36,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:36,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:36,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:36,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:36,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:36,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:26:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:36,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:36,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:36,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:36,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:26:36,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:36,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:36,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:36,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:36,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:37,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389024640] [2020-10-13 04:26:37,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:37,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:26:37,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084438970] [2020-10-13 04:26:37,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:26:37,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:26:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:37,030 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 20 states. [2020-10-13 04:26:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:38,222 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-13 04:26:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:26:38,223 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-13 04:26:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:38,224 INFO L225 Difference]: With dead ends: 93 [2020-10-13 04:26:38,224 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:26:38,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:26:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:26:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2020-10-13 04:26:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:26:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-13 04:26:38,241 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 37 [2020-10-13 04:26:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:38,241 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-13 04:26:38,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:26:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-13 04:26:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:26:38,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:38,242 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:38,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:26:38,243 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash -117864012, now seen corresponding path program 5 times [2020-10-13 04:26:38,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:38,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491487146] [2020-10-13 04:26:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:38,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:38,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:38,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:26:38,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-13 04:26:38,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:26:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:26:38,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:38,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:38,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:38,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:38,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:38,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:38,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:38,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:38,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:38,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:38,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:38,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:38,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 04:26:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:38,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:38,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:38,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:38,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:38,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:38,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:38,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 04:26:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:38,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:38,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:38,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:38,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:38,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:38,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:38,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:26:38,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491487146] [2020-10-13 04:26:38,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:38,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:26:38,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536080394] [2020-10-13 04:26:38,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:26:38,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:26:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:38,445 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 10 states. [2020-10-13 04:26:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:38,600 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-10-13 04:26:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:26:38,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 04:26:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:38,603 INFO L225 Difference]: With dead ends: 85 [2020-10-13 04:26:38,603 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:26:38,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:26:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-10-13 04:26:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:26:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-13 04:26:38,624 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 39 [2020-10-13 04:26:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:38,625 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-13 04:26:38,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:26:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-13 04:26:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:26:38,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:38,626 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:38,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:26:38,627 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:38,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1426627073, now seen corresponding path program 8 times [2020-10-13 04:26:38,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:38,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576465444] [2020-10-13 04:26:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:38,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:38,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:38,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:39,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:39,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:39,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:39,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:40,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:41,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:43,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:26:43,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 04:26:43,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:26:43,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:43,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:26:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:26:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:43,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:43,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:43,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:43,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:43,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:43,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:43,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:43,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576465444] [2020-10-13 04:26:43,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:43,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:26:43,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060680483] [2020-10-13 04:26:43,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:26:43,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:43,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:26:43,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:43,783 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 13 states. [2020-10-13 04:26:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:44,135 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2020-10-13 04:26:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:26:44,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-13 04:26:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:44,138 INFO L225 Difference]: With dead ends: 133 [2020-10-13 04:26:44,138 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:26:44,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:26:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:26:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 60. [2020-10-13 04:26:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:26:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-13 04:26:44,155 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 37 [2020-10-13 04:26:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:44,156 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-13 04:26:44,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:26:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-13 04:26:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:26:44,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:44,157 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:44,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:26:44,158 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -846885043, now seen corresponding path program 7 times [2020-10-13 04:26:44,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:44,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295853998] [2020-10-13 04:26:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:44,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:45,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:45,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:26:45,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:26:45,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-13 04:26:45,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:45,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:26:45,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:45,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:26:45,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:46,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:46,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:46,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:46,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:46,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:46,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:46,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:46,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295853998] [2020-10-13 04:26:46,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:46,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:26:46,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617765262] [2020-10-13 04:26:46,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:26:46,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:46,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:26:46,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:46,083 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 21 states. [2020-10-13 04:26:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:47,595 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-10-13 04:26:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:26:47,596 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-10-13 04:26:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:47,597 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:26:47,598 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 04:26:47,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:26:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 04:26:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-10-13 04:26:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:26:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-13 04:26:47,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 38 [2020-10-13 04:26:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:47,610 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-13 04:26:47,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:26:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-13 04:26:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:26:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:47,610 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:47,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:26:47,610 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1660210427, now seen corresponding path program 6 times [2020-10-13 04:26:47,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:47,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097894334] [2020-10-13 04:26:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:47,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:48,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:26:48,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:26:48,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-13 04:26:48,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:26:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:26:48,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:48,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:48,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:48,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:48,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:48,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:48,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 04:26:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:48,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:48,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:48,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:48,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:48,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:48,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:48,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:48,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:48,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:48,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 04:26:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:48,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:48,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:48,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:48,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:48,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:48,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:48,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:48,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:48,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:26:48,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097894334] [2020-10-13 04:26:48,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:48,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:26:48,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690344259] [2020-10-13 04:26:48,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:26:48,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:26:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:48,527 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 19 states. [2020-10-13 04:26:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:49,340 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-13 04:26:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:26:49,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-13 04:26:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:49,345 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:26:49,346 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 04:26:49,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:26:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 04:26:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-10-13 04:26:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:26:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-10-13 04:26:49,359 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 42 [2020-10-13 04:26:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:49,360 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-10-13 04:26:49,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:26:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-10-13 04:26:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:26:49,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:49,361 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:49,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:26:49,361 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1850806188, now seen corresponding path program 7 times [2020-10-13 04:26:49,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:49,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732262355] [2020-10-13 04:26:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:49,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:49,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:49,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:49,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:26:51,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:26:51,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2006 [2020-10-13 04:26:51,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:26:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:51,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 04:26:51,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:51,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:51,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:51,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:26:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:51,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:51,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:51,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:51,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:51,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:51,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:51,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 04:26:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:51,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:51,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:51,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:51,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:51,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:51,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:51,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:26:51,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732262355] [2020-10-13 04:26:51,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:51,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:26:51,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088903125] [2020-10-13 04:26:51,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:26:51,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:26:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:51,842 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 20 states. [2020-10-13 04:26:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:53,160 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-13 04:26:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:26:53,160 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-13 04:26:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:53,162 INFO L225 Difference]: With dead ends: 99 [2020-10-13 04:26:53,162 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:26:53,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:26:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:26:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-10-13 04:26:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 04:26:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-13 04:26:53,187 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 45 [2020-10-13 04:26:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:53,187 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-13 04:26:53,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:26:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-13 04:26:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:26:53,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:53,188 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:53,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:26:53,188 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1086743131, now seen corresponding path program 8 times [2020-10-13 04:26:53,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:53,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246426319] [2020-10-13 04:26:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:53,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:56,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:56,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:26:56,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:26:56,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3752 [2020-10-13 04:26:56,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:56,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:26:56,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:56,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:26:56,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:57,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:57,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:57,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:57,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:57,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:57,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:57,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:57,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:26:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:57,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:57,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:57,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:57,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:57,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:57,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:57,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:57,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:26:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:57,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:57,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:57,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:57,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:26:57,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246426319] [2020-10-13 04:26:57,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:57,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:26:57,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143872011] [2020-10-13 04:26:57,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:26:57,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:57,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:26:57,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:57,392 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 20 states. [2020-10-13 04:26:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:58,421 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-10-13 04:26:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:26:58,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-13 04:26:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:58,423 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:26:58,423 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 04:26:58,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:26:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 04:26:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2020-10-13 04:26:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:26:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-10-13 04:26:58,440 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 48 [2020-10-13 04:26:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:58,440 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-10-13 04:26:58,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:26:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-10-13 04:26:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:26:58,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:58,441 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:58,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:26:58,442 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2071887182, now seen corresponding path program 9 times [2020-10-13 04:26:58,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:58,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924677820] [2020-10-13 04:26:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:58,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:58,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:26:58,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:58,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 04:26:58,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:26:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:26:58,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:58,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:58,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:58,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:58,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:58,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:58,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:58,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:58,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:58,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:58,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 04:26:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:58,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:58,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:58,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 04:26:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:58,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:58,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:58,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:58,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:58,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:58,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:58,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:58,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 04:26:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:58,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:58,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:58,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:58,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:58,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:58,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:58,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:58,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:26:58,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924677820] [2020-10-13 04:26:58,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:58,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:26:58,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212863718] [2020-10-13 04:26:58,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:26:58,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:58,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:26:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:58,653 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 12 states. [2020-10-13 04:26:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:58,872 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-13 04:26:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:58,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 04:26:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:58,874 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:26:58,874 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 04:26:58,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 04:26:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 04:26:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:26:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-13 04:26:58,890 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 50 [2020-10-13 04:26:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:58,891 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-13 04:26:58,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:26:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-13 04:26:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:26:58,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:58,892 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:58,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:26:58,892 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash -635117836, now seen corresponding path program 10 times [2020-10-13 04:26:58,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:58,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848053026] [2020-10-13 04:26:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:58,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:58,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:01,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:27:01,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 04:27:01,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2999 [2020-10-13 04:27:01,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:01,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:27:01,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:01,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 04:27:01,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:02,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:02,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:02,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:02,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:02,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:02,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:02,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:02,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:02,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:27:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:02,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:02,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:02,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:02,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:02,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:02,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:02,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:02,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:27:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:02,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:02,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:02,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:02,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:27:02,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848053026] [2020-10-13 04:27:02,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:02,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:27:02,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28386711] [2020-10-13 04:27:02,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:27:02,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:27:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:27:02,852 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 26 states. [2020-10-13 04:27:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:05,943 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2020-10-13 04:27:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:27:05,943 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-10-13 04:27:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:05,944 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:27:05,945 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 04:27:05,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 04:27:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 04:27:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-13 04:27:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:27:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-13 04:27:05,963 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 51 [2020-10-13 04:27:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:05,964 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-13 04:27:05,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:27:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-13 04:27:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:27:05,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:05,964 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:05,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:27:05,965 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1077099787, now seen corresponding path program 11 times [2020-10-13 04:27:05,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:05,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359778408] [2020-10-13 04:27:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:05,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:06,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:06,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:06,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:08,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:08,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:27:08,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:27:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2517 [2020-10-13 04:27:08,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:27:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 04:27:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:08,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:08,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:08,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:08,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:08,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:08,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:08,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:08,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:08,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:08,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:08,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:08,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:27:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:08,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:08,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:08,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:08,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:08,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 04:27:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:08,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:08,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:08,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:08,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 04:27:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:08,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:08,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:08,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:27:08,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359778408] [2020-10-13 04:27:08,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:08,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:27:08,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029763108] [2020-10-13 04:27:08,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:27:08,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:27:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:27:08,969 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 22 states. [2020-10-13 04:27:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:09,927 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-10-13 04:27:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:27:09,928 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-13 04:27:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:09,929 INFO L225 Difference]: With dead ends: 97 [2020-10-13 04:27:09,930 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:27:09,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:27:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:27:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-13 04:27:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:27:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-10-13 04:27:09,957 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 53 [2020-10-13 04:27:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:09,957 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-10-13 04:27:09,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:27:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-10-13 04:27:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:27:09,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:09,958 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:09,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:27:09,959 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:09,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1800769605, now seen corresponding path program 12 times [2020-10-13 04:27:09,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:09,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277089375] [2020-10-13 04:27:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:13,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:13,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:27:13,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 04:27:13,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3169 [2020-10-13 04:27:13,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:13,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:27:13,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:13,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:27:13,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:13,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:13,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:13,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:13,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:13,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:13,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:27:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:13,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:13,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:13,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:13,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:13,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:13,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:27:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:13,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:13,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:13,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:13,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:27:14,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277089375] [2020-10-13 04:27:14,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:14,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:27:14,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777654425] [2020-10-13 04:27:14,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:27:14,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:14,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:27:14,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:27:14,009 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 27 states. [2020-10-13 04:27:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:16,125 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-10-13 04:27:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:27:16,126 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 54 [2020-10-13 04:27:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:16,127 INFO L225 Difference]: With dead ends: 103 [2020-10-13 04:27:16,127 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:27:16,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:27:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:27:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2020-10-13 04:27:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:27:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-13 04:27:16,148 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 54 [2020-10-13 04:27:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:16,149 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-13 04:27:16,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:27:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-13 04:27:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:27:16,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:16,150 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:16,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:27:16,150 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:16,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1872214034, now seen corresponding path program 13 times [2020-10-13 04:27:16,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:16,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180764604] [2020-10-13 04:27:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:16,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:17,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:17,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:21,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:27:21,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:27:21,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:27:21,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:27:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:21,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:27:21,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:27:21,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:21,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:21,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:21,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:27:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:21,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:21,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:21,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:21,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:21,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:22,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:27:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:22,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:22,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:22,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:22,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:22,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:27:22,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:22,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:22,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:22,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:22,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:22,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:27:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:22,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:22,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:22,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:22,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:22,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:22,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:22,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:22,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:27:22,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180764604] [2020-10-13 04:27:22,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:22,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:27:22,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047126242] [2020-10-13 04:27:22,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:27:22,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:27:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:27:22,145 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 26 states. [2020-10-13 04:27:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:24,452 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2020-10-13 04:27:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:27:24,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-13 04:27:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:24,454 INFO L225 Difference]: With dead ends: 128 [2020-10-13 04:27:24,454 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 04:27:24,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=273, Invalid=2697, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:27:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 04:27:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-10-13 04:27:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:27:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-13 04:27:24,478 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 56 [2020-10-13 04:27:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:24,478 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-13 04:27:24,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:27:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-13 04:27:24,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:27:24,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:24,479 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:24,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:27:24,479 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1918858325, now seen corresponding path program 14 times [2020-10-13 04:27:24,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:24,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46807286] [2020-10-13 04:27:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:24,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:28,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:29,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:29,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:27:29,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 04:27:29,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:27:29,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:27:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 04:27:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:30,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:30,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:30,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:30,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:30,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:30,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:30,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:30,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:30,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:27:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:30,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:30,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:30,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:30,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:30,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:30,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:30,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:27:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:30,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:30,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:30,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:30,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:30,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:27:30,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:30,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:27:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:30,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:30,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 104 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:27:30,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46807286] [2020-10-13 04:27:30,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:30,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:27:30,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943692529] [2020-10-13 04:27:30,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:27:30,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:27:30,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:27:30,602 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 28 states. [2020-10-13 04:27:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:34,123 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2020-10-13 04:27:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:27:34,124 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-10-13 04:27:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:34,126 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:27:34,126 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:27:34,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=337, Invalid=3695, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 04:27:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:27:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-10-13 04:27:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:27:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-10-13 04:27:34,149 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 59 [2020-10-13 04:27:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:34,149 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-10-13 04:27:34,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:27:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-10-13 04:27:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:27:34,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:34,150 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:34,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:27:34,150 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2023154370, now seen corresponding path program 15 times [2020-10-13 04:27:34,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:34,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899010884] [2020-10-13 04:27:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:27:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:34,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:34,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:34,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:34,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:27:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:34,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:34,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 04:27:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:34,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:34,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:34,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:34,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:34,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:34,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 04:27:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:34,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:34,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:34,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:34,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:34,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:34,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 04:27:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:34,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:27:34,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899010884] [2020-10-13 04:27:34,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:34,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:27:34,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981544748] [2020-10-13 04:27:34,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:27:34,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:27:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:27:34,421 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 14 states. [2020-10-13 04:27:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:34,702 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-13 04:27:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:27:34,703 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-13 04:27:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:34,704 INFO L225 Difference]: With dead ends: 112 [2020-10-13 04:27:34,704 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:27:34,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:27:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:27:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-13 04:27:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:27:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-13 04:27:34,724 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 61 [2020-10-13 04:27:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:34,725 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-13 04:27:34,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:27:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-13 04:27:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:27:34,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:34,726 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:34,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:27:34,726 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1295489678, now seen corresponding path program 16 times [2020-10-13 04:27:34,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:34,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543639887] [2020-10-13 04:27:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:34,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:35,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:35,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:35,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:35,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:36,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:36,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:36,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:36,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:36,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:36,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:37,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:39,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:39,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:27:39,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 04:27:39,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:27:39,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:39,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:27:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:27:39,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:27:40,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:40,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:40,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:40,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:40,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:40,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:40,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:40,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:27:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:40,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:40,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:40,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:40,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:40,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:40,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:40,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:40,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:27:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:40,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:40,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:40,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:40,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:40,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:40,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:40,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:40,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:40,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:40,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:40,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:27:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:40,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:40,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:40,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:40,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:40,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:40,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:40,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:40,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 125 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:27:40,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543639887] [2020-10-13 04:27:40,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:40,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:27:40,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569259005] [2020-10-13 04:27:40,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:27:40,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:27:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:27:40,845 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 28 states. [2020-10-13 04:27:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:43,769 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-10-13 04:27:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:27:43,769 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-13 04:27:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:43,771 INFO L225 Difference]: With dead ends: 117 [2020-10-13 04:27:43,771 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:27:43,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=390, Invalid=2580, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:27:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:27:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 69. [2020-10-13 04:27:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 04:27:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-13 04:27:43,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 62 [2020-10-13 04:27:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:43,787 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-13 04:27:43,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:27:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-13 04:27:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:27:43,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:43,788 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:43,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:27:43,788 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash -214997303, now seen corresponding path program 17 times [2020-10-13 04:27:43,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:43,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760008286] [2020-10-13 04:27:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:43,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:44,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:45,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:48,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:27:48,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:49,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:49,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:49,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:49,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:49,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:49,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:49,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:49,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:49,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:49,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:49,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:27:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:49,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:49,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:49,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:49,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:27:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:49,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:49,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:49,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:49,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:49,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:49,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:49,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:49,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:27:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:49,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:49,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:49,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:49,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:49,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:49,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:49,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 04:27:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:49,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:49,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 7 proven. 99 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:27:49,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760008286] [2020-10-13 04:27:49,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:49,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:27:49,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652439660] [2020-10-13 04:27:49,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:27:49,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:49,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:27:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:27:49,434 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 25 states. [2020-10-13 04:27:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:50,630 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-10-13 04:27:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:27:50,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-13 04:27:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:50,632 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:27:50,632 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:27:50,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:27:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:27:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-13 04:27:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:27:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-13 04:27:50,654 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 64 [2020-10-13 04:27:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:50,654 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-13 04:27:50,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:27:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-13 04:27:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:27:50,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:50,656 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:50,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:27:50,656 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1919184542, now seen corresponding path program 18 times [2020-10-13 04:27:50,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:50,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404582725] [2020-10-13 04:27:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:51,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:51,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:52,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:52,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:55,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 04:27:55,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:56,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:56,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:56,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:56,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:56,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:56,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:56,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:56,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:27:56,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:27:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:56,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:56,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:56,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:56,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:56,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:56,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:56,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:56,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:56,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:56,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:56,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:27:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:56,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:56,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:56,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:56,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:56,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:27:56,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:56,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:56,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:56,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:56,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:56,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:27:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:56,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:56,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:56,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:56,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:56,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:56,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:56,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:56,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:27:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:56,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:56,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:56,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:56,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:56,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:56,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 10 proven. 116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:27:56,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404582725] [2020-10-13 04:27:56,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:56,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:27:56,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795173944] [2020-10-13 04:27:56,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:27:56,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:27:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:27:56,840 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 26 states. [2020-10-13 04:27:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:59,190 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2020-10-13 04:27:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:27:59,191 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-10-13 04:27:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:59,192 INFO L225 Difference]: With dead ends: 125 [2020-10-13 04:27:59,192 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:27:59,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=290, Invalid=2790, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 04:27:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:27:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-10-13 04:27:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:27:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-13 04:27:59,217 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 67 [2020-10-13 04:27:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:59,217 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-13 04:27:59,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:27:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-13 04:27:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:27:59,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:59,218 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:59,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:27:59,218 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash -552815575, now seen corresponding path program 19 times [2020-10-13 04:27:59,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:59,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436225034] [2020-10-13 04:27:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:59,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:04,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:04,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:04,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:28:04,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 04:28:04,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:28:04,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:04,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:28:04,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:04,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:28:04,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:05,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:05,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:05,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:05,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:05,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:05,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:28:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:05,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:05,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:05,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:05,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:05,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:28:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:05,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:05,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:05,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:05,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:28:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:05,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:05,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:05,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:05,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:05,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:05,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:05,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:05,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:05,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:05,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:28:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:05,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:05,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:05,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:05,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:05,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 132 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:28:05,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436225034] [2020-10-13 04:28:05,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:05,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:28:05,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495172010] [2020-10-13 04:28:05,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:28:05,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:28:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:28:05,273 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 25 states. [2020-10-13 04:28:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:07,018 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2020-10-13 04:28:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:28:07,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2020-10-13 04:28:07,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:07,021 INFO L225 Difference]: With dead ends: 153 [2020-10-13 04:28:07,021 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 04:28:07,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:28:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 04:28:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 93. [2020-10-13 04:28:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 04:28:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-10-13 04:28:07,048 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 70 [2020-10-13 04:28:07,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:07,048 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-10-13 04:28:07,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:28:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-10-13 04:28:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:28:07,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:07,049 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:07,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:28:07,050 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:07,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1881435776, now seen corresponding path program 20 times [2020-10-13 04:28:07,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:07,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500687698] [2020-10-13 04:28:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:07,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:28:07,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-13 04:28:07,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:28:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 04:28:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:07,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:07,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:28:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:07,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:07,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:07,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:07,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:07,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:07,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:07,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:07,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:07,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:28:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:07,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:28:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:07,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:07,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 04:28:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:07,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:07,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:07,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:07,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:07,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:07,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 04:28:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:07,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:07,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:07,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:07,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:07,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 60 proven. 57 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 04:28:07,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500687698] [2020-10-13 04:28:07,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:07,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:28:07,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807207839] [2020-10-13 04:28:07,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:28:07,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:28:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:28:07,400 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 16 states. [2020-10-13 04:28:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:07,767 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-13 04:28:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:28:07,767 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 04:28:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:07,768 INFO L225 Difference]: With dead ends: 125 [2020-10-13 04:28:07,768 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:28:07,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:28:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:28:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-13 04:28:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 04:28:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2020-10-13 04:28:07,792 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 72 [2020-10-13 04:28:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:07,793 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2020-10-13 04:28:07,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:28:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2020-10-13 04:28:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:28:07,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:07,794 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:07,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:28:07,794 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1230688226, now seen corresponding path program 1 times [2020-10-13 04:28:07,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:07,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174086556] [2020-10-13 04:28:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:07,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:08,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:08,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:08,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:10,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:12,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:12,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:28:12,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:28:12,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:28:12,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:12,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:28:12,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:28:12,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:28:12,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:12,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:12,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:12,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:12,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:12,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:12,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:12,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:12,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:28:12,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:12,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:28:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:12,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:12,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:12,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:12,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:12,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:12,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:12,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:28:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:12,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:12,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:12,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:12,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:12,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:12,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:12,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 04:28:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:12,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:12,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:12,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:12,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:12,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:12,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:12,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:12,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:12,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:12,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:12,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 04:28:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:12,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:12,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:12,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 8 proven. 117 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:28:12,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174086556] [2020-10-13 04:28:12,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:12,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:28:12,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971031332] [2020-10-13 04:28:12,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:28:12,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:28:12,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:28:12,990 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 14 states. [2020-10-13 04:28:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:13,378 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2020-10-13 04:28:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:28:13,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-10-13 04:28:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:13,380 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:28:13,380 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:28:13,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:28:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:28:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-10-13 04:28:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:28:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-13 04:28:13,411 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 72 [2020-10-13 04:28:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:13,411 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-13 04:28:13,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:28:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-13 04:28:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:28:13,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:13,413 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:13,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:28:13,414 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1540016130, now seen corresponding path program 21 times [2020-10-13 04:28:13,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:13,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836095097] [2020-10-13 04:28:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:13,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:13,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:13,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:13,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:15,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:15,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:17,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:18,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:18,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:28:18,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 04:28:18,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:28:18,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:28:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 04:28:18,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:19,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:19,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:19,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 04:28:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 04:28:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:19,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 04:28:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 04:28:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:19,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 158 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:28:19,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836095097] [2020-10-13 04:28:19,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:19,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:28:19,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162625425] [2020-10-13 04:28:19,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:28:19,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:19,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:28:19,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:28:19,466 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 27 states. [2020-10-13 04:28:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:21,736 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2020-10-13 04:28:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:28:21,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-10-13 04:28:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:21,739 INFO L225 Difference]: With dead ends: 158 [2020-10-13 04:28:21,739 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 04:28:21,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:28:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 04:28:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 96. [2020-10-13 04:28:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:28:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2020-10-13 04:28:21,762 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 73 [2020-10-13 04:28:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:21,762 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2020-10-13 04:28:21,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:28:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2020-10-13 04:28:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:28:21,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:21,763 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:21,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:28:21,764 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1246957543, now seen corresponding path program 22 times [2020-10-13 04:28:21,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:21,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958653620] [2020-10-13 04:28:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:21,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:21,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:26,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:28:26,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:28:26,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:28:26,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:28:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 04:28:26,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:28:27,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:27,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:27,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:28:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:27,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:27,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:27,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:27,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:28:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:27,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:27,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:27,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:28:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:27,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:27,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:28:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 04:28:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:27,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:27,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 10 proven. 127 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 04:28:27,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958653620] [2020-10-13 04:28:27,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:27,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:28:27,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847362920] [2020-10-13 04:28:27,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:28:27,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:28:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:28:27,396 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 25 states. [2020-10-13 04:28:28,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:28,510 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2020-10-13 04:28:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:28:28,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2020-10-13 04:28:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:28,518 INFO L225 Difference]: With dead ends: 131 [2020-10-13 04:28:28,518 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:28:28,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:28:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:28:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2020-10-13 04:28:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:28:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2020-10-13 04:28:28,559 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 75 [2020-10-13 04:28:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:28,559 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2020-10-13 04:28:28,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:28:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2020-10-13 04:28:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:28:28,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:28,561 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:28,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:28:28,561 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1897705093, now seen corresponding path program 2 times [2020-10-13 04:28:28,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:28,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103495472] [2020-10-13 04:28:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:29,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:29,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:29,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:29,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:28:33,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:28:33,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:28:33,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:28:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:28:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:28:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:33,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:33,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:33,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:33,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:28:33,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:28:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:33,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:33,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:33,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:33,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:28:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:33,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:33,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:28:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:33,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:33,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 04:28:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:33,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:33,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 8 proven. 145 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:28:33,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103495472] [2020-10-13 04:28:33,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:33,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:28:33,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967072715] [2020-10-13 04:28:33,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:28:33,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:28:33,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:28:33,784 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand 15 states. [2020-10-13 04:28:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:34,300 INFO L93 Difference]: Finished difference Result 212 states and 245 transitions. [2020-10-13 04:28:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:28:34,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-13 04:28:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:34,302 INFO L225 Difference]: With dead ends: 212 [2020-10-13 04:28:34,303 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:28:34,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:28:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:28:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 125. [2020-10-13 04:28:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 04:28:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2020-10-13 04:28:34,334 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 75 [2020-10-13 04:28:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:34,334 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2020-10-13 04:28:34,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:28:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2020-10-13 04:28:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:28:34,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:34,336 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:34,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:28:34,336 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:34,337 INFO L82 PathProgramCache]: Analyzing trace with hash -950896247, now seen corresponding path program 23 times [2020-10-13 04:28:34,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:34,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773184109] [2020-10-13 04:28:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:34,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:34,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:36,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:36,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:37,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:38,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:39,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:39,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:39,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:28:39,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 04:28:39,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:28:39,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:39,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:28:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:28:39,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:40,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:40,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:40,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:40,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:40,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 04:28:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:40,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:40,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 04:28:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:40,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 04:28:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:40,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:40,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 04:28:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:40,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:40,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 10 proven. 194 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:28:40,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773184109] [2020-10-13 04:28:40,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:40,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:28:40,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018910258] [2020-10-13 04:28:40,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:28:40,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:28:40,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:28:40,915 INFO L87 Difference]: Start difference. First operand 125 states and 141 transitions. Second operand 33 states. [2020-10-13 04:28:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:47,575 INFO L93 Difference]: Finished difference Result 192 states and 222 transitions. [2020-10-13 04:28:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-13 04:28:47,576 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-13 04:28:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:47,577 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:28:47,577 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 04:28:47,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=760, Invalid=7612, Unknown=0, NotChecked=0, Total=8372 [2020-10-13 04:28:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 04:28:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-10-13 04:28:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 04:28:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2020-10-13 04:28:47,621 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 76 [2020-10-13 04:28:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:47,622 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2020-10-13 04:28:47,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:28:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2020-10-13 04:28:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:28:47,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:47,623 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:47,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:28:47,623 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:47,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1577999328, now seen corresponding path program 24 times [2020-10-13 04:28:47,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:47,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013269278] [2020-10-13 04:28:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:47,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:47,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:47,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:47,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:50,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:50,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:52,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:52,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:28:52,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:28:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:28:52,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:28:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:28:52,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:53,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:53,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:53,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:53,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:53,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:53,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:53,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:53,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:53,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:53,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:53,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:53,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:28:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:53,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:53,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:53,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:53,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:53,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:28:53,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:53,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:53,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:53,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:53,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:53,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:28:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:53,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:53,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:53,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:53,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:53,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:53,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:53,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:53,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:53,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:28:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:53,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:53,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:53,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:53,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:53,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:53,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:54,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:28:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:54,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:54,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:54,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:54,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:54,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:54,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:54,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:54,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:54,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:54,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 04:28:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:54,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:54,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:54,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:54,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:54,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:54,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:54,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:54,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:54,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:54,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 11 proven. 167 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:28:54,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013269278] [2020-10-13 04:28:54,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:54,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:28:54,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509199409] [2020-10-13 04:28:54,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:28:54,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:28:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=865, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:28:54,065 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand 31 states. [2020-10-13 04:28:57,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:57,414 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2020-10-13 04:28:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:28:57,416 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2020-10-13 04:28:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:57,417 INFO L225 Difference]: With dead ends: 186 [2020-10-13 04:28:57,418 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 04:28:57,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=249, Invalid=3173, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 04:28:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 04:28:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2020-10-13 04:28:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:28:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2020-10-13 04:28:57,526 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 78 [2020-10-13 04:28:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:57,527 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2020-10-13 04:28:57,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:28:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2020-10-13 04:28:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:28:57,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:57,531 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:57,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:28:57,531 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash 927251778, now seen corresponding path program 3 times [2020-10-13 04:28:57,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:57,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795940101] [2020-10-13 04:28:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:58,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:58,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:58,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:00,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:00,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:01,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:01,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:29:02,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:02,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:02,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:02,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:02,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:02,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:29:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:02,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:29:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:02,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:29:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:02,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:02,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:02,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:02,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:02,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:29:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:02,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:02,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:02,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:02,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:02,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:02,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:02,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:02,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:02,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 04:29:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:02,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:29:02,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795940101] [2020-10-13 04:29:02,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:02,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:29:02,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30842837] [2020-10-13 04:29:02,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:29:02,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:29:02,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:29:02,794 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand 16 states. [2020-10-13 04:29:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:03,318 INFO L93 Difference]: Finished difference Result 242 states and 283 transitions. [2020-10-13 04:29:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:29:03,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-10-13 04:29:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:03,323 INFO L225 Difference]: With dead ends: 242 [2020-10-13 04:29:03,323 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 04:29:03,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:29:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 04:29:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2020-10-13 04:29:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 04:29:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2020-10-13 04:29:03,391 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 78 [2020-10-13 04:29:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:03,391 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2020-10-13 04:29:03,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:29:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2020-10-13 04:29:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 04:29:03,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:03,393 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:03,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:29:03,393 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:03,393 INFO L82 PathProgramCache]: Analyzing trace with hash 723420834, now seen corresponding path program 25 times [2020-10-13 04:29:03,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:03,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210430323] [2020-10-13 04:29:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:06,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:06,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:07,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:07,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:07,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:07,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:08,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:08,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:08,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:08,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:29:08,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 04:29:08,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:29:08,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:29:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 04:29:08,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:09,041 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-10-13 04:29:09,325 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-13 04:29:10,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:10,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:10,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:10,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:10,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:10,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:10,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:10,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:10,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:10,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 04:29:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:10,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:10,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:10,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:10,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 04:29:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:10,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:10,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:10,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:10,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:10,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:10,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:10,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:10,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 04:29:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:10,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:29:10,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 04:29:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:10,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:10,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:10,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:10,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:10,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:10,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 13 proven. 223 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:29:10,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210430323] [2020-10-13 04:29:10,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:10,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:29:10,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786014088] [2020-10-13 04:29:10,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:29:10,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:29:10,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:29:10,775 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand 33 states. [2020-10-13 04:29:11,810 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-13 04:29:16,541 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-13 04:29:17,056 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 04:29:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:19,849 INFO L93 Difference]: Finished difference Result 223 states and 262 transitions. [2020-10-13 04:29:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-13 04:29:19,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 79 [2020-10-13 04:29:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:19,850 INFO L225 Difference]: With dead ends: 223 [2020-10-13 04:29:19,850 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 04:29:19,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1067, Invalid=10063, Unknown=0, NotChecked=0, Total=11130 [2020-10-13 04:29:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 04:29:19,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 178. [2020-10-13 04:29:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 04:29:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2020-10-13 04:29:19,927 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 79 [2020-10-13 04:29:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:19,928 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2020-10-13 04:29:19,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:29:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2020-10-13 04:29:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:29:19,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:19,930 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:19,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:29:19,930 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:19,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:19,931 INFO L82 PathProgramCache]: Analyzing trace with hash -16021831, now seen corresponding path program 26 times [2020-10-13 04:29:19,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:19,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090362488] [2020-10-13 04:29:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:19,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:20,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:20,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:20,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:21,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:23,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:24,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:24,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:24,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:29:24,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 04:29:24,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:29:24,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:29:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 04:29:24,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:26,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:26,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:26,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:26,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:26,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:26,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:26,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:26,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:26,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:26,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:26,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:26,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 04:29:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:26,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:26,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:26,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:26,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:26,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:26,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:26,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 04:29:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:26,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:26,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:26,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:26,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:26,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:26,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:26,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:26,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:26,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:26,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:26,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 04:29:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:26,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:26,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:29:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:26,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 04:29:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:26,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:26,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:26,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:26,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:26,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:26,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:26,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:26,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 04:29:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:26,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:26,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:26,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:26,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:26,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:26,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:26,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 183 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:29:26,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090362488] [2020-10-13 04:29:26,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:26,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:29:26,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292806458] [2020-10-13 04:29:26,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:29:26,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:26,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:29:26,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:29:26,473 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand 31 states. [2020-10-13 04:29:31,011 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 04:29:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:33,240 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2020-10-13 04:29:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 04:29:33,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-10-13 04:29:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:33,242 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:29:33,242 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 04:29:33,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=536, Invalid=6106, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 04:29:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 04:29:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2020-10-13 04:29:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:29:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2020-10-13 04:29:33,306 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 81 [2020-10-13 04:29:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:33,306 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2020-10-13 04:29:33,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:29:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2020-10-13 04:29:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:29:33,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:33,308 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:33,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:29:33,308 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1517004752, now seen corresponding path program 27 times [2020-10-13 04:29:33,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:33,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660660037] [2020-10-13 04:29:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:29:33,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-13 04:29:33,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:29:33,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:29:33,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:33,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:33,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:33,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:29:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:33,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:33,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:33,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:33,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:33,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:29:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:33,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:29:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:33,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:33,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:33,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:33,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:33,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:29:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:33,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:33,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:33,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:33,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:33,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 04:29:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:33,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 04:29:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:33,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:33,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:33,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:33,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:33,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:33,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 84 proven. 77 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 04:29:33,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660660037] [2020-10-13 04:29:33,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:33,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:29:33,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32009599] [2020-10-13 04:29:33,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:29:33,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:33,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:29:33,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:29:33,926 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand 18 states. [2020-10-13 04:29:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:34,542 INFO L93 Difference]: Finished difference Result 176 states and 203 transitions. [2020-10-13 04:29:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:29:34,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-13 04:29:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:34,545 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:29:34,545 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:29:34,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:29:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:29:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-13 04:29:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:29:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2020-10-13 04:29:34,583 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 83 [2020-10-13 04:29:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:34,583 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2020-10-13 04:29:34,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:29:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2020-10-13 04:29:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:29:34,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:34,584 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:34,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:29:34,585 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash -666769381, now seen corresponding path program 4 times [2020-10-13 04:29:34,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:34,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959064349] [2020-10-13 04:29:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:34,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:34,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:29:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:39,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:39,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:39,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:39,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:29:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:39,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 04:29:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:39,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:39,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:39,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:39,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:39,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:39,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:39,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 04:29:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:39,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:39,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:39,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:39,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:39,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:39,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:39,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:39,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:39,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:39,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 04:29:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:39,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:39,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:39,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:39,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:39,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:39,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:39,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:39,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:39,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 04:29:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:39,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:39,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 8 proven. 210 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:29:39,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959064349] [2020-10-13 04:29:39,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:39,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:29:39,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428968994] [2020-10-13 04:29:39,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:29:39,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:29:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:29:39,910 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand 17 states. [2020-10-13 04:29:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:40,666 INFO L93 Difference]: Finished difference Result 245 states and 286 transitions. [2020-10-13 04:29:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:29:40,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-13 04:29:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:40,669 INFO L225 Difference]: With dead ends: 245 [2020-10-13 04:29:40,669 INFO L226 Difference]: Without dead ends: 210 [2020-10-13 04:29:40,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:29:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-13 04:29:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 142. [2020-10-13 04:29:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:29:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2020-10-13 04:29:40,713 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 81 [2020-10-13 04:29:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:40,713 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2020-10-13 04:29:40,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:29:40,714 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2020-10-13 04:29:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:29:40,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:40,714 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:40,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:29:40,715 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:40,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1446594839, now seen corresponding path program 28 times [2020-10-13 04:29:40,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:40,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289097159] [2020-10-13 04:29:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:40,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:40,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:41,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:41,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:43,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:43,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:43,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:43,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:44,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:44,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:44,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:45,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:45,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:45,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:29:45,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 04:29:45,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:29:45,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:45,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:29:45,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:45,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:29:45,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:48,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:48,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:48,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:48,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:48,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:48,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:48,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:48,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:48,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:48,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:48,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:48,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 04:29:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:48,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:48,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:48,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:48,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 04:29:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:48,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:48,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:48,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:48,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:48,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:48,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:48,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:48,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 04:29:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:48,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:48,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:48,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:48,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:48,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:48,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:48,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:48,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:48,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:48,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:48,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 04:29:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:48,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:48,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:48,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:48,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:48,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:48,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:48,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:48,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 8 proven. 254 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:29:48,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289097159] [2020-10-13 04:29:48,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:48,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:29:48,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916113090] [2020-10-13 04:29:48,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:29:48,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:29:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:29:48,300 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand 34 states.