/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-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:03,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:03,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:03,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:03,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:03,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:03,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:03,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:03,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:03,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:03,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:03,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:03,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:03,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:03,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:03,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:03,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:03,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:03,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:03,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:03,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:03,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:03,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:03,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:03,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:03,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:03,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:03,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:03,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:03,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:03,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:03,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:03,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:03,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:03,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:03,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:03,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:03,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:03,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:03,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:03,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:03,839 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 04:38:03,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:03,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:03,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:03,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:03,865 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:03,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:03,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:03,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:03,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:03,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:03,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:03,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:03,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:03,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:03,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:03,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:03,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:03,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:03,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:03,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:03,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:03,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:03,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:03,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:03,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:03,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:03,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:03,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:03,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:03,870 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 04:38:04,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:04,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:04,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:04,220 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:04,220 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:04,221 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2020-10-13 04:38:04,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d3023adf/6eb8aecf7e174c64b0aa3ffba438cb68/FLAG447dcd646 [2020-10-13 04:38:04,796 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:04,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2020-10-13 04:38:04,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d3023adf/6eb8aecf7e174c64b0aa3ffba438cb68/FLAG447dcd646 [2020-10-13 04:38:05,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d3023adf/6eb8aecf7e174c64b0aa3ffba438cb68 [2020-10-13 04:38:05,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:05,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:05,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:05,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:05,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:05,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12925ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05, skipping insertion in model container [2020-10-13 04:38:05,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:05,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:05,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:05,467 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:05,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:05,526 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:05,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05 WrapperNode [2020-10-13 04:38:05,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:05,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:05,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:05,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:05,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (1/1) ... [2020-10-13 04:38:05,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:05,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:05,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:05,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:05,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (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 04:38:05,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:38:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:38:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:38:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 04:38:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 04:38:05,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:05,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 04:38:05,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:05,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:05,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:05,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:05,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:06,010 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:06,010 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 04:38:06,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:06 BoogieIcfgContainer [2020-10-13 04:38:06,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:06,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:06,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:06,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:06,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:05" (1/3) ... [2020-10-13 04:38:06,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a83e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:06, skipping insertion in model container [2020-10-13 04:38:06,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:05" (2/3) ... [2020-10-13 04:38:06,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a83e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:06, skipping insertion in model container [2020-10-13 04:38:06,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:06" (3/3) ... [2020-10-13 04:38:06,027 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2020-10-13 04:38:06,040 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:06,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:06,092 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:06,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:06,137 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:06,137 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:06,138 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:06,138 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:06,138 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:06,138 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:06,138 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 04:38:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:38:06,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:06,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:06,169 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:06,175 INFO L82 PathProgramCache]: Analyzing trace with hash -96391067, now seen corresponding path program 1 times [2020-10-13 04:38:06,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:06,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333403506] [2020-10-13 04:38:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:06,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:06,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:38:06,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:06,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-13 04:38:06,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:38:06,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:06,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:06,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:06,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:06,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:38:06,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:06,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:06,986 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 04:38:06,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333403506] [2020-10-13 04:38:06,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:06,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:38:06,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949972620] [2020-10-13 04:38:06,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:38:06,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:38:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:07,015 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 04:38:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:07,128 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-13 04:38:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:38:07,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-13 04:38:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:07,140 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:38:07,140 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 04:38:07,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 04:38:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 04:38:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:38:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 04:38:07,187 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-10-13 04:38:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:07,188 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 04:38:07,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:38:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 04:38:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:38:07,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:07,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:07,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:07,190 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:07,190 INFO L82 PathProgramCache]: Analyzing trace with hash -974847405, now seen corresponding path program 1 times [2020-10-13 04:38:07,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:07,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367365164] [2020-10-13 04:38:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:08,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:38:08,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-13 04:38:08,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:08,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:08,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:08,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:08,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:08,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:08,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:08,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:08,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:08,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:08,312 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 04:38:08,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367365164] [2020-10-13 04:38:08,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:08,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:08,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681168309] [2020-10-13 04:38:08,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:08,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:08,317 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-13 04:38:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:08,409 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 04:38:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:08,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 04:38:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:08,411 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:38:08,411 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:38:08,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:38:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 04:38:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:38:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 04:38:08,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-10-13 04:38:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:08,421 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 04:38:08,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 04:38:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:38:08,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:08,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:08,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:08,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 678014577, now seen corresponding path program 1 times [2020-10-13 04:38:08,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:08,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7375192] [2020-10-13 04:38:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:08,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:10,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:38:10,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:10,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-13 04:38:10,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:10,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:10,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:10,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:10,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:10,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:10,476 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 04:38:10,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7375192] [2020-10-13 04:38:10,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:10,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:10,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593655358] [2020-10-13 04:38:10,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:10,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:10,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:10,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:10,479 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-10-13 04:38:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:10,602 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-13 04:38:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:10,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 04:38:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:10,604 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:38:10,604 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:38:10,614 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 04:38:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:38:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 04:38:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 04:38:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 04:38:10,621 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-10-13 04:38:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:10,622 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 04:38:10,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 04:38:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:38:10,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:10,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:10,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:10,624 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash -59520241, now seen corresponding path program 2 times [2020-10-13 04:38:10,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:10,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467908899] [2020-10-13 04:38:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:10,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:11,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:38:11,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:38:11,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-13 04:38:11,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:11,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:11,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:11,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:11,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:11,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:11,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:11,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:11,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:11,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:11,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:11,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:11,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:11,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:11,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-13 04:38:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:11,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467908899] [2020-10-13 04:38:11,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:11,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:38:11,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26885334] [2020-10-13 04:38:11,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:11,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:11,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:11,468 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-10-13 04:38:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:11,590 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-13 04:38:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:11,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 04:38:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:11,592 INFO L225 Difference]: With dead ends: 51 [2020-10-13 04:38:11,592 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:38:11,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:38:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-13 04:38:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 04:38:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-13 04:38:11,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-13 04:38:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:11,600 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-13 04:38:11,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-13 04:38:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:11,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:11,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:11,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:11,602 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1940914169, now seen corresponding path program 1 times [2020-10-13 04:38:11,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:11,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165854517] [2020-10-13 04:38:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:11,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:13,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:14,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:14,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:15,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:15,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:16,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:16,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:38:16,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:38:16,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:16,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:16,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:16,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:16,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:16,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:16,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:16,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:16,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:16,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:16,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:16,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 04:38:16,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165854517] [2020-10-13 04:38:16,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:16,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:16,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524320449] [2020-10-13 04:38:16,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:16,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:16,687 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-10-13 04:38:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:16,871 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-13 04:38:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:16,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-13 04:38:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:16,872 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:38:16,873 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:38:16,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:38:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 04:38:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:38:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 04:38:16,881 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-13 04:38:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:16,881 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 04:38:16,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 04:38:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:38:16,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:16,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:16,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:16,884 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:16,884 INFO L82 PathProgramCache]: Analyzing trace with hash 850205951, now seen corresponding path program 2 times [2020-10-13 04:38:16,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:16,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52931467] [2020-10-13 04:38:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:38:22,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 04:38:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-13 04:38:22,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:38:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:38:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:38:23,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:23,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:23,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:23,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:23,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:23,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:23,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:23,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52931467] [2020-10-13 04:38:23,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:23,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:38:23,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616202575] [2020-10-13 04:38:23,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:38:23,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:38:23,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:38:23,388 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 23 states. [2020-10-13 04:38:23,594 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-13 04:38:24,802 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 04:38:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:25,628 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-10-13 04:38:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:38:25,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2020-10-13 04:38:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:25,630 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:38:25,630 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:38:25,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:38:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:38:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2020-10-13 04:38:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:38:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-13 04:38:25,649 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2020-10-13 04:38:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:25,650 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-13 04:38:25,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:38:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-13 04:38:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:38:25,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:25,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:25,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:25,653 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:25,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1075461597, now seen corresponding path program 3 times [2020-10-13 04:38:25,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:25,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382766971] [2020-10-13 04:38:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:25,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:38:30,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:38:30,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:38:30,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:30,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:30,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:30,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:30,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:30,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:30,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:30,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:30,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:38:30,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382766971] [2020-10-13 04:38:30,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:30,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:30,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041057199] [2020-10-13 04:38:30,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:30,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:30,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:30,779 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 10 states. [2020-10-13 04:38:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:31,132 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-13 04:38:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:31,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 04:38:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:31,135 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:38:31,135 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:38:31,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:38:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-10-13 04:38:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:38:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-13 04:38:31,151 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 42 [2020-10-13 04:38:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:31,151 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-13 04:38:31,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-13 04:38:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:38:31,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:31,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:31,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:31,154 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash 744873851, now seen corresponding path program 4 times [2020-10-13 04:38:31,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:31,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215761613] [2020-10-13 04:38:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:31,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:36,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:36,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:38:36,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:36,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:38:36,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:38:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:38:36,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:36,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:36,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:36,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:36,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:36,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 04:38:36,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215761613] [2020-10-13 04:38:36,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:36,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:36,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891357551] [2020-10-13 04:38:36,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:36,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:36,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:36,263 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 10 states. [2020-10-13 04:38:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:36,548 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 04:38:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:36,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 04:38:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:36,549 INFO L225 Difference]: With dead ends: 68 [2020-10-13 04:38:36,550 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 04:38:36,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 04:38:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 04:38:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:38:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-13 04:38:36,558 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2020-10-13 04:38:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:36,558 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-13 04:38:36,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-13 04:38:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:38:36,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:36,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:36,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:36,560 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash -86338283, now seen corresponding path program 5 times [2020-10-13 04:38:36,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:36,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765416636] [2020-10-13 04:38:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:36,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:36,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:38,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:41,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:41,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:38:41,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 04:38:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:38:41,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:38:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:41,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 04:38:41,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:44,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:44,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:44,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:44,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:38:44,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765416636] [2020-10-13 04:38:44,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:44,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:38:44,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932220661] [2020-10-13 04:38:44,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:38:44,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:38:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:38:44,035 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 33 states. [2020-10-13 04:38:44,717 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2020-10-13 04:38:45,088 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-13 04:38:45,999 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 70 [2020-10-13 04:38:46,446 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 04:38:46,697 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 04:38:47,238 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 74 [2020-10-13 04:38:47,649 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-13 04:38:47,964 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 04:38:48,233 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-13 04:38:48,575 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-10-13 04:38:48,868 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 67 [2020-10-13 04:38:49,243 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 80 [2020-10-13 04:38:49,589 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-13 04:38:49,864 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 63 [2020-10-13 04:38:50,238 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-13 04:38:50,606 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 75 [2020-10-13 04:38:51,505 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-13 04:38:51,888 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-13 04:38:52,209 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-10-13 04:38:52,527 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 70 [2020-10-13 04:38:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:52,881 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-13 04:38:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:38:52,881 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 50 [2020-10-13 04:38:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:52,882 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:38:52,883 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:38:52,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=630, Invalid=4482, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 04:38:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:38:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-10-13 04:38:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:38:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-13 04:38:52,897 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 50 [2020-10-13 04:38:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:52,897 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-13 04:38:52,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:38:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-13 04:38:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:38:52,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:52,898 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:52,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:38:52,899 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:52,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:52,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1334859661, now seen corresponding path program 6 times [2020-10-13 04:38:52,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:52,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54473328] [2020-10-13 04:38:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:52,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:53,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:57,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:38:57,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:38:57,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:38:57,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:57,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:38:57,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:57,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:38:57,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:58,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:58,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:58,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:58,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:58,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:58,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:58,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 04:38:58,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54473328] [2020-10-13 04:38:58,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:58,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:38:58,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653590621] [2020-10-13 04:38:58,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:38:58,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:58,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:38:58,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:38:58,011 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 12 states. [2020-10-13 04:38:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:58,418 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2020-10-13 04:38:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:38:58,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 04:38:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:58,420 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:38:58,421 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 04:38:58,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 04:38:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-10-13 04:38:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 04:38:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-13 04:38:58,433 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 52 [2020-10-13 04:38:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:58,433 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-13 04:38:58,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:38:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-13 04:38:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:38:58,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:58,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:58,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:38:58,435 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:58,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1265869679, now seen corresponding path program 7 times [2020-10-13 04:38:58,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:58,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582205496] [2020-10-13 04:38:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:00,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:03,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:39:03,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:03,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:39:03,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:03,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:03,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 04:39:03,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:39:03,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:03,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:03,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:03,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:03,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:03,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:03,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:03,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:03,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:03,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 04:39:03,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582205496] [2020-10-13 04:39:03,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:03,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:03,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702825573] [2020-10-13 04:39:03,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:03,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:03,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:03,534 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 12 states. [2020-10-13 04:39:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:03,922 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-13 04:39:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:03,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-13 04:39:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:03,924 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:39:03,924 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:39:03,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:39:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:39:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 04:39:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:39:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-13 04:39:03,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2020-10-13 04:39:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:03,933 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-13 04:39:03,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-13 04:39:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 04:39:03,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:03,934 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:03,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:39:03,935 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:03,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1466685013, now seen corresponding path program 8 times [2020-10-13 04:39:03,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:03,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820931233] [2020-10-13 04:39:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:03,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:07,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:08,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 04:39:08,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:39:08,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:39:08,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:08,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:39:08,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 04:39:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:12,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:12,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:12,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:12,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:12,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:12,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:12,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:12,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:12,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:12,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:12,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:12,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820931233] [2020-10-13 04:39:12,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:12,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:39:12,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190915961] [2020-10-13 04:39:12,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:39:12,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:12,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:39:12,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1646, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:39:12,130 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 43 states. [2020-10-13 04:39:12,660 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-13 04:39:13,826 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 04:39:15,071 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-13 04:39:15,665 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-13 04:39:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:16,851 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2020-10-13 04:39:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 04:39:16,852 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 60 [2020-10-13 04:39:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:16,853 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:39:16,854 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:39:16,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=464, Invalid=4366, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 04:39:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:39:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-10-13 04:39:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:39:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-13 04:39:16,878 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 60 [2020-10-13 04:39:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:16,878 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-13 04:39:16,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:39:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-13 04:39:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:39:16,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:16,879 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:16,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:39:16,880 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:16,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1863053431, now seen corresponding path program 9 times [2020-10-13 04:39:16,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:16,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213246580] [2020-10-13 04:39:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:21,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:39:21,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:21,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:39:21,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:39:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:39:21,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:22,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:22,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:22,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:22,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 04:39:22,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213246580] [2020-10-13 04:39:22,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:22,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:39:22,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979490627] [2020-10-13 04:39:22,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:39:22,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:22,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:39:22,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:22,019 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 14 states. [2020-10-13 04:39:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:22,553 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2020-10-13 04:39:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:39:22,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 04:39:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:22,555 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:39:22,555 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 04:39:22,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:39:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 04:39:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-10-13 04:39:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 04:39:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2020-10-13 04:39:22,582 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 62 [2020-10-13 04:39:22,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:22,582 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2020-10-13 04:39:22,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:39:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2020-10-13 04:39:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:39:22,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:22,584 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:22,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:39:22,584 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1321328585, now seen corresponding path program 10 times [2020-10-13 04:39:22,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:22,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892659635] [2020-10-13 04:39:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:22,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:22,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:27,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:39:27,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:39:27,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:39:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:39:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:27,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:27,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:27,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:27,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:27,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:39:27,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:27,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:27,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:27,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:27,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 04:39:27,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892659635] [2020-10-13 04:39:27,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:27,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:39:27,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053122272] [2020-10-13 04:39:27,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:39:27,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:39:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:27,749 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand 14 states. [2020-10-13 04:39:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:28,452 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2020-10-13 04:39:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:39:28,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 04:39:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:28,454 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:39:28,454 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:39:28,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:39:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:39:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 04:39:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 04:39:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-13 04:39:28,476 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-13 04:39:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:28,477 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-13 04:39:28,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:39:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-13 04:39:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:39:28,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:28,479 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:28,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:39:28,480 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:28,480 INFO L82 PathProgramCache]: Analyzing trace with hash 25705153, now seen corresponding path program 11 times [2020-10-13 04:39:28,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:28,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258630784] [2020-10-13 04:39:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:28,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:30,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:31,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:33,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:33,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:33,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:39:33,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:33,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:39:33,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 04:39:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 04:39:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:34,406 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-10-13 04:39:34,582 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-13 04:39:34,936 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-13 04:39:39,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:39,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:39,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:39,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:39,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:39,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:39,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:39,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:39,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 98 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:39:39,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258630784] [2020-10-13 04:39:39,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:39,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:39:39,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313492377] [2020-10-13 04:39:39,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:39:39,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:39,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:39:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2144, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:39:39,321 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 48 states. [2020-10-13 04:39:39,868 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 18 [2020-10-13 04:39:40,870 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-13 04:39:42,155 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2020-10-13 04:39:42,444 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-13 04:39:44,065 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-10-13 04:39:45,633 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-13 04:39:46,190 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-13 04:39:46,704 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2020-10-13 04:39:47,836 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-13 04:39:48,080 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-13 04:39:48,358 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-13 04:39:48,630 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 04:39:48,923 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-13 04:39:49,327 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-10-13 04:39:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:49,707 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-10-13 04:39:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 04:39:49,708 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 70 [2020-10-13 04:39:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:49,709 INFO L225 Difference]: With dead ends: 117 [2020-10-13 04:39:49,709 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:39:49,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=480, Invalid=7892, Unknown=0, NotChecked=0, Total=8372 [2020-10-13 04:39:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:39:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-10-13 04:39:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:39:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-10-13 04:39:49,722 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 70 [2020-10-13 04:39:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:49,723 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-10-13 04:39:49,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:39:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-10-13 04:39:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:39:49,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:49,724 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:49,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:39:49,724 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:49,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:49,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1363006239, now seen corresponding path program 12 times [2020-10-13 04:39:49,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:49,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458570190] [2020-10-13 04:39:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:49,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:49,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:54,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:54,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:39:54,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:54,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:39:54,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:54,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:39:54,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:54,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:39:54,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:54,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:54,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:54,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:54,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:54,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:54,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:54,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:54,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:54,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:54,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:54,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 04:39:54,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458570190] [2020-10-13 04:39:54,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:54,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:39:54,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120647030] [2020-10-13 04:39:54,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:39:54,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:54,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:39:54,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:39:54,977 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 16 states. [2020-10-13 04:39:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:55,879 INFO L93 Difference]: Finished difference Result 194 states and 209 transitions. [2020-10-13 04:39:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:39:55,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 04:39:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:55,882 INFO L225 Difference]: With dead ends: 194 [2020-10-13 04:39:55,882 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:39:55,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:39:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:39:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2020-10-13 04:39:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 04:39:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2020-10-13 04:39:55,901 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 72 [2020-10-13 04:39:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:55,901 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2020-10-13 04:39:55,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:39:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2020-10-13 04:39:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:39:55,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:55,903 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:55,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:39:55,903 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash 904219709, now seen corresponding path program 13 times [2020-10-13 04:39:55,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:55,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339112951] [2020-10-13 04:39:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:55,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:57,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:00,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:00,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:40:00,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:40:00,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:40:00,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:00,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:40:00,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 04:40:00,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:40:00,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:01,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:01,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:01,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:01,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:01,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:01,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:01,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:01,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:01,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:01,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:01,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-13 04:40:01,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339112951] [2020-10-13 04:40:01,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:01,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:40:01,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337648213] [2020-10-13 04:40:01,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:40:01,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:40:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:40:01,115 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand 16 states. [2020-10-13 04:40:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:01,952 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-10-13 04:40:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:40:01,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-13 04:40:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:01,954 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:40:01,954 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:40:01,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:40:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:40:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 04:40:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 04:40:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-13 04:40:01,969 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2020-10-13 04:40:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:01,970 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-13 04:40:01,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:40:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-13 04:40:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:40:01,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:01,971 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:01,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:40:01,971 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash -621991849, now seen corresponding path program 14 times [2020-10-13 04:40:01,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:01,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480799076] [2020-10-13 04:40:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:02,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:03,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:07,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:40:07,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:40:07,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:40:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 04:40:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 04:40:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:13,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:13,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:13,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:13,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:13,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:13,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:13,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:13,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:13,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:13,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:40:13,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480799076] [2020-10-13 04:40:13,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:13,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 04:40:13,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364765853] [2020-10-13 04:40:13,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 04:40:13,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:13,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 04:40:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2928, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 04:40:13,542 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 56 states. [2020-10-13 04:40:14,647 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-13 04:40:17,392 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-13 04:40:17,784 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-13 04:40:18,547 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2020-10-13 04:40:19,128 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2020-10-13 04:40:19,544 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-13 04:40:20,765 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-10-13 04:40:23,387 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2020-10-13 04:40:23,831 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-13 04:40:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:25,653 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2020-10-13 04:40:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 04:40:25,654 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 80 [2020-10-13 04:40:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:25,656 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:40:25,656 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:40:25,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=444, Invalid=7566, Unknown=0, NotChecked=0, Total=8010 [2020-10-13 04:40:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:40:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2020-10-13 04:40:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:40:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2020-10-13 04:40:25,670 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2020-10-13 04:40:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:25,671 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2020-10-13 04:40:25,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 04:40:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2020-10-13 04:40:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:40:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:25,671 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:25,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:40:25,672 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:25,672 INFO L82 PathProgramCache]: Analyzing trace with hash 778785589, now seen corresponding path program 15 times [2020-10-13 04:40:25,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:25,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235343467] [2020-10-13 04:40:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:25,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:25,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:30,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:40:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:30,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:30,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 04:40:30,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235343467] [2020-10-13 04:40:30,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:30,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:40:30,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974277531] [2020-10-13 04:40:30,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:40:30,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:40:30,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:40:30,937 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 18 states. [2020-10-13 04:40:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:31,841 INFO L93 Difference]: Finished difference Result 234 states and 250 transitions. [2020-10-13 04:40:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:40:31,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-13 04:40:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:31,844 INFO L225 Difference]: With dead ends: 234 [2020-10-13 04:40:31,844 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:40:31,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:40:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:40:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-10-13 04:40:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 04:40:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2020-10-13 04:40:31,858 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 82 [2020-10-13 04:40:31,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:31,858 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2020-10-13 04:40:31,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:40:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2020-10-13 04:40:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:40:31,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:31,859 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:31,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:40:31,860 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash 966557395, now seen corresponding path program 16 times [2020-10-13 04:40:31,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:31,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380960536] [2020-10-13 04:40:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:31,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:33,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:40:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:37,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:37,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:37,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:37,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:37,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:37,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:37,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:40:37,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380960536] [2020-10-13 04:40:37,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:37,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:40:37,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696154467] [2020-10-13 04:40:37,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:40:37,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:40:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:40:37,189 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand 18 states. [2020-10-13 04:40:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:38,541 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-13 04:40:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:40:38,542 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-13 04:40:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:38,543 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:40:38,544 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:40:38,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:40:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:40:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 04:40:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 04:40:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-13 04:40:38,555 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2020-10-13 04:40:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:38,556 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-13 04:40:38,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:40:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-13 04:40:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:40:38,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:38,557 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:38,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:40:38,557 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash -813608339, now seen corresponding path program 17 times [2020-10-13 04:40:38,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:38,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616269579] [2020-10-13 04:40:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:43,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:43,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:40:43,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:43,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:40:43,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 04:40:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 04:40:43,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:44,758 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-10-13 04:40:44,973 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-13 04:40:45,194 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-13 04:40:45,442 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-13 04:40:45,696 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-13 04:40:45,956 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-13 04:40:46,194 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-13 04:40:46,427 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-13 04:40:46,661 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-13 04:40:46,926 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-13 04:40:47,226 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-13 04:40:47,554 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-13 04:40:47,867 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-13 04:40:48,249 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-13 04:40:48,627 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-13 04:40:49,034 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-13 04:40:49,469 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 04:40:49,893 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-13 04:40:50,335 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-13 04:40:50,811 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-13 04:40:51,299 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 04:40:51,797 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-13 04:40:52,263 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-13 04:40:52,767 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-13 04:40:53,255 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-13 04:40:53,685 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-13 04:40:54,331 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-13 04:40:54,738 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-13 04:40:55,103 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-13 04:40:55,483 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-13 04:40:55,898 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-13 04:40:56,351 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-13 04:41:03,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:03,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:03,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:03,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:03,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:03,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:03,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:03,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:41:03,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616269579] [2020-10-13 04:41:03,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:03,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 04:41:03,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083432028] [2020-10-13 04:41:03,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 04:41:03,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 04:41:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4727, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 04:41:03,589 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 71 states. [2020-10-13 04:41:04,716 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2020-10-13 04:41:06,501 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-13 04:41:06,853 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-13 04:41:07,488 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-13 04:41:08,147 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-13 04:41:08,608 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-13 04:41:09,083 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-13 04:41:09,575 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-13 04:41:10,251 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-13 04:41:13,234 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-13 04:41:16,082 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2020-10-13 04:41:16,610 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-10-13 04:41:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:18,714 INFO L93 Difference]: Finished difference Result 163 states and 171 transitions. [2020-10-13 04:41:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-13 04:41:18,716 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 90 [2020-10-13 04:41:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:18,719 INFO L225 Difference]: With dead ends: 163 [2020-10-13 04:41:18,719 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 04:41:18,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=382, Invalid=8174, Unknown=0, NotChecked=0, Total=8556 [2020-10-13 04:41:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 04:41:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 144. [2020-10-13 04:41:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:41:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-13 04:41:18,737 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 90 [2020-10-13 04:41:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:18,738 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-13 04:41:18,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 04:41:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-13 04:41:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:41:18,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:18,738 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:18,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:41:18,739 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1763897291, now seen corresponding path program 18 times [2020-10-13 04:41:18,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:18,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188962998] [2020-10-13 04:41:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:18,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:18,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:23,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:41:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:24,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:24,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:24,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:24,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:24,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:24,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:24,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:24,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:24,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 04:41:24,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188962998] [2020-10-13 04:41:24,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:24,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:41:24,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260986035] [2020-10-13 04:41:24,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:41:24,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:24,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:41:24,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:41:24,121 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 20 states. [2020-10-13 04:41:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:25,575 INFO L93 Difference]: Finished difference Result 278 states and 295 transitions. [2020-10-13 04:41:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:41:25,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 04:41:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:25,581 INFO L225 Difference]: With dead ends: 278 [2020-10-13 04:41:25,581 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 04:41:25,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:41:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 04:41:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2020-10-13 04:41:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:41:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 154 transitions. [2020-10-13 04:41:25,599 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 154 transitions. Word has length 92 [2020-10-13 04:41:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:25,599 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 154 transitions. [2020-10-13 04:41:25,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:41:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 154 transitions. [2020-10-13 04:41:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:41:25,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:25,600 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:25,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:41:25,601 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash 445906955, now seen corresponding path program 19 times [2020-10-13 04:41:25,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:25,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347501312] [2020-10-13 04:41:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:25,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:30,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:30,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:41:30,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:41:30,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:41:30,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:41:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:41:30,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:31,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:31,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:31,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:31,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 04:41:31,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347501312] [2020-10-13 04:41:31,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:31,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:41:31,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783296336] [2020-10-13 04:41:31,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:41:31,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:41:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:41:31,066 INFO L87 Difference]: Start difference. First operand 147 states and 154 transitions. Second operand 20 states. [2020-10-13 04:41:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:32,966 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2020-10-13 04:41:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:41:32,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 04:41:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:32,970 INFO L225 Difference]: With dead ends: 154 [2020-10-13 04:41:32,971 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:41:32,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:41:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:41:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 04:41:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 04:41:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-13 04:41:32,982 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-13 04:41:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:32,983 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-13 04:41:32,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:41:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-13 04:41:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:41:32,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:32,984 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:32,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:41:32,984 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1972050179, now seen corresponding path program 20 times [2020-10-13 04:41:32,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:32,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906673001] [2020-10-13 04:41:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:33,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:35,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:37,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:38,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:38,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:41:38,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:41:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5921 [2020-10-13 04:41:38,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 04:41:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 04:41:38,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:42,442 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-13 04:41:45,700 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-13 04:41:46,687 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 04:41:47,219 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-13 04:41:47,717 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-13 04:41:48,250 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-13 04:41:51,330 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-13 04:41:51,876 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36