/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-examples/standard_init3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:34:40,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:34:40,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:34:40,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:34:40,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:34:40,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:34:40,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:34:40,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:34:40,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:34:40,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:34:40,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:34:40,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:34:40,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:34:40,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:34:40,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:34:40,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:34:40,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:34:40,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:34:40,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:34:40,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:34:40,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:34:40,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:34:40,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:34:40,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:34:40,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:34:40,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:34:40,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:34:40,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:34:40,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:34:40,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:34:40,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:34:40,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:34:40,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:34:40,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:34:40,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:34:40,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:34:40,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:34:40,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:34:40,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:34:40,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:34:40,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:34:40,792 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 23:34:40,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:34:40,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:34:40,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:34:40,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:34:40,817 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:34:40,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:34:40,817 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:34:40,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:34:40,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:34:40,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:34:40,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:34:40,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:34:40,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:34:40,818 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:34:40,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:34:40,819 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:34:40,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:34:40,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:34:40,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:34:40,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:34:40,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:34:40,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:34:40,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:34:40,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:34:40,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:34:40,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:34:40,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:34:40,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:34:40,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:34:40,822 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:34:41,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:34:41,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:34:41,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:34:41,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:34:41,151 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:34:41,152 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2020-10-13 23:34:41,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58b2dbf36/68417976ba8c490eb49fc3d2b9ad3aff/FLAG7ff04cb2d [2020-10-13 23:34:41,741 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:34:41,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2020-10-13 23:34:41,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58b2dbf36/68417976ba8c490eb49fc3d2b9ad3aff/FLAG7ff04cb2d [2020-10-13 23:34:42,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58b2dbf36/68417976ba8c490eb49fc3d2b9ad3aff [2020-10-13 23:34:42,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:34:42,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:34:42,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:42,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:34:42,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:34:42,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4931e9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42, skipping insertion in model container [2020-10-13 23:34:42,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:34:42,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:34:42,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:42,387 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:34:42,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:42,423 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:34:42,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42 WrapperNode [2020-10-13 23:34:42,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:42,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:34:42,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:34:42,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:34:42,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (1/1) ... [2020-10-13 23:34:42,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:34:42,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:34:42,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:34:42,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:34:42,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (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 23:34:42,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:34:42,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:34:42,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:34:42,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:34:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:34:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:34:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:34:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:34:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:34:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:34:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:34:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:34:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:34:42,896 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:34:42,896 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:34:42,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:42 BoogieIcfgContainer [2020-10-13 23:34:42,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:34:42,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:34:42,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:34:42,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:34:42,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:34:42" (1/3) ... [2020-10-13 23:34:42,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663b3790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:42, skipping insertion in model container [2020-10-13 23:34:42,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:42" (2/3) ... [2020-10-13 23:34:42,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663b3790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:42, skipping insertion in model container [2020-10-13 23:34:42,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:42" (3/3) ... [2020-10-13 23:34:42,910 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-2.i [2020-10-13 23:34:42,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:34:42,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:34:42,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:34:42,980 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:34:42,980 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:34:42,980 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:34:42,980 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:34:42,981 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:34:42,981 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:34:42,981 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:34:42,981 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:34:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 23:34:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:43,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:43,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:43,012 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash 578824766, now seen corresponding path program 1 times [2020-10-13 23:34:43,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:43,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730143994] [2020-10-13 23:34:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:43,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:43,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-13 23:34:43,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:34:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:43,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:34:43,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:43,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:43,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:34:43,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:43,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:43,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:43,650 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 23:34:43,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730143994] [2020-10-13 23:34:43,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:43,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:34:43,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717242750] [2020-10-13 23:34:43,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:34:43,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:43,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:34:43,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:43,679 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 23:34:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:43,793 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-10-13 23:34:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:34:43,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 23:34:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:43,808 INFO L225 Difference]: With dead ends: 47 [2020-10-13 23:34:43,809 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 23:34:43,814 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 23:34:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 23:34:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 23:34:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:34:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 23:34:43,857 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-10-13 23:34:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:43,858 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 23:34:43,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:34:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 23:34:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:43,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:43,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:43,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:34:43,861 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash -823304390, now seen corresponding path program 1 times [2020-10-13 23:34:43,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:43,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323573230] [2020-10-13 23:34:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:44,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:44,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-13 23:34:44,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:44,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:34:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:34:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:34:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:44,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:44,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:44,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:44,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:44,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:34:44,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:44,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:44,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:44,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:44,093 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 23:34:44,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323573230] [2020-10-13 23:34:44,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:44,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:34:44,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425350208] [2020-10-13 23:34:44,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:34:44,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:44,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:34:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:44,098 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-13 23:34:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:44,180 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-13 23:34:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:34:44,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:34:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:44,183 INFO L225 Difference]: With dead ends: 40 [2020-10-13 23:34:44,183 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 23:34:44,184 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 23:34:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 23:34:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 23:34:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:34:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 23:34:44,192 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 23:34:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:44,193 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 23:34:44,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:34:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 23:34:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:34:44,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:44,194 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 23:34:44,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:34:44,195 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash 3753729, now seen corresponding path program 1 times [2020-10-13 23:34:44,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:44,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516869639] [2020-10-13 23:34:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:44,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:45,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:34:45,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:45,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-13 23:34:45,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:45,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:45,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:34:45,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:34:45,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:34:45,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:34:45,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:45,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:34:45,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:45,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:45,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:34:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:34:45,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516869639] [2020-10-13 23:34:45,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:45,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:34:45,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381733651] [2020-10-13 23:34:45,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:34:45,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:45,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:34:45,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:45,209 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 23:34:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:45,327 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 23:34:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:34:45,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 23:34:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:45,329 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:34:45,329 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:34:45,330 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 23:34:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:34:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:34:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:34:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 23:34:45,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2020-10-13 23:34:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:45,339 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 23:34:45,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:34:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 23:34:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:34:45,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:45,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:45,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:34:45,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1185149478, now seen corresponding path program 2 times [2020-10-13 23:34:45,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:45,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914943633] [2020-10-13 23:34:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:45,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:46,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:46,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:34:46,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:46,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-13 23:34:46,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:46,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:34:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:46,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:34:46,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:46,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:46,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:46,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:46,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:46,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:46,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:46,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:46,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:34:46,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914943633] [2020-10-13 23:34:46,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:46,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:34:46,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108474743] [2020-10-13 23:34:46,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:34:46,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:34:46,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:46,827 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2020-10-13 23:34:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:46,922 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 23:34:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:34:46,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 23:34:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:46,924 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:34:46,924 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:34:46,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:34:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:34:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:34:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 23:34:46,933 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 23:34:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:46,933 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 23:34:46,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:34:46,933 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 23:34:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:34:46,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:46,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:46,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:34:46,935 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash 455820257, now seen corresponding path program 3 times [2020-10-13 23:34:46,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:46,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754237933] [2020-10-13 23:34:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:46,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:49,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:49,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:34:49,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:49,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2886 [2020-10-13 23:34:49,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:49,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:34:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:49,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:34:49,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:49,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:49,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:49,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:49,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:49,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:49,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:34:49,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:49,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:49,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:34:49,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754237933] [2020-10-13 23:34:49,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:49,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:34:49,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121217386] [2020-10-13 23:34:49,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:34:49,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:34:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:49,942 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2020-10-13 23:34:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:50,067 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-13 23:34:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:34:50,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 23:34:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:50,069 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:34:50,069 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:34:50,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:34:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:34:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:34:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 23:34:50,080 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-10-13 23:34:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:50,080 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 23:34:50,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:34:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 23:34:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:34:50,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:50,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:50,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:34:50,083 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:50,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1002382458, now seen corresponding path program 4 times [2020-10-13 23:34:50,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:50,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298943133] [2020-10-13 23:34:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:50,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:50,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:51,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:54,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:34:54,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:54,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4247 [2020-10-13 23:34:54,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:54,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:34:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:34:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:34:54,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:34:54,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:54,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:54,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:54,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:54,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:54,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:54,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:54,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:54,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:54,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:54,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 23:34:54,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298943133] [2020-10-13 23:34:54,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:54,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:34:54,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986317822] [2020-10-13 23:34:54,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:34:54,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:34:54,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:54,458 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-10-13 23:34:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:54,639 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-13 23:34:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:34:54,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 23:34:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:54,641 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:34:54,641 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:34:54,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:34:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 23:34:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:34:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 23:34:54,655 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2020-10-13 23:34:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:54,655 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 23:34:54,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:34:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 23:34:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:34:54,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:54,657 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:54,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:34:54,658 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1395779391, now seen corresponding path program 5 times [2020-10-13 23:34:54,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:54,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573917013] [2020-10-13 23:34:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:56,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:59,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:34:59,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:59,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:34:59,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:59,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:34:59,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:59,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:34:59,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:59,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:59,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:59,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:59,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:59,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:59,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:59,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:34:59,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573917013] [2020-10-13 23:34:59,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:59,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:34:59,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023444396] [2020-10-13 23:34:59,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:34:59,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:34:59,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:59,761 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 9 states. [2020-10-13 23:34:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:59,878 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-13 23:34:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:34:59,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 23:34:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:59,880 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:34:59,880 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:34:59,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:59,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:34:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:34:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:34:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-13 23:34:59,887 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2020-10-13 23:34:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:59,887 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-13 23:34:59,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:34:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-13 23:34:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:34:59,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:59,889 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:59,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:34:59,889 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1957995290, now seen corresponding path program 6 times [2020-10-13 23:34:59,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:59,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096573955] [2020-10-13 23:34:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:59,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:04,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:35:04,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:35:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:35:04,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:04,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:35:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:35:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:35:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:05,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:05,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:05,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:05,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:05,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:05,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:35:05,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:05,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:05,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:05,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:05,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 23:35:05,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096573955] [2020-10-13 23:35:05,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:05,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:35:05,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135823120] [2020-10-13 23:35:05,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:35:05,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:35:05,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:35:05,056 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-10-13 23:35:05,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:05,227 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 23:35:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:35:05,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 23:35:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:05,229 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:35:05,229 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:35:05,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:35:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:35:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 23:35:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:35:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-13 23:35:05,246 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 35 [2020-10-13 23:35:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:05,248 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-13 23:35:05,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:35:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-13 23:35:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:35:05,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:05,250 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:05,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:35:05,251 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:05,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1474050655, now seen corresponding path program 7 times [2020-10-13 23:35:05,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:05,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302255838] [2020-10-13 23:35:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:05,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:10,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:10,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:35:10,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:35:10,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:10,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:10,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:10,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:35:10,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:35:10,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:35:10,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:10,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:10,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:10,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:10,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:10,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:10,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:10,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:10,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:10,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 23:35:10,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302255838] [2020-10-13 23:35:10,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:10,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:35:10,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636113008] [2020-10-13 23:35:10,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:35:10,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:35:10,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:35:10,381 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 11 states. [2020-10-13 23:35:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:10,490 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-13 23:35:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:35:10,490 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-13 23:35:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:10,492 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:35:10,492 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:35:10,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:35:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:35:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 23:35:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:35:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 23:35:10,498 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 38 [2020-10-13 23:35:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:10,499 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 23:35:10,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:35:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 23:35:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:35:10,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:10,500 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:10,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:35:10,500 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2136639930, now seen corresponding path program 8 times [2020-10-13 23:35:10,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:10,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656512117] [2020-10-13 23:35:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:10,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:10,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:10,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:15,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:35:15,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:15,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:35:15,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:15,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:35:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:35:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:35:15,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:15,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:15,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:15,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:15,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:15,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:15,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 23:35:15,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656512117] [2020-10-13 23:35:15,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:15,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:35:15,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655719358] [2020-10-13 23:35:15,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:35:15,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:35:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:15,631 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2020-10-13 23:35:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:15,737 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 23:35:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:35:15,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-13 23:35:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:15,738 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:35:15,739 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:35:15,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:35:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 23:35:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:35:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-13 23:35:15,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2020-10-13 23:35:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:15,746 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-13 23:35:15,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:35:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-13 23:35:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:35:15,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:15,748 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:15,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:35:15,748 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:15,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1548858751, now seen corresponding path program 9 times [2020-10-13 23:35:15,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:15,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093138131] [2020-10-13 23:35:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:15,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:20,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:20,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:35:20,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:20,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:20,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:20,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:20,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:35:20,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:20,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:35:20,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:20,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:20,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:20,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:20,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:20,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:20,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:20,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:20,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:20,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:20,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:20,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:20,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 23:35:20,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093138131] [2020-10-13 23:35:20,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:20,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:35:20,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238677141] [2020-10-13 23:35:20,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:35:20,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:35:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:20,867 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 13 states. [2020-10-13 23:35:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:20,973 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-10-13 23:35:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:35:20,974 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-13 23:35:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:20,975 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:35:20,975 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:35:20,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:35:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 23:35:20,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:35:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 23:35:20,988 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2020-10-13 23:35:20,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:20,989 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 23:35:20,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:35:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 23:35:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:35:20,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:20,990 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:20,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:35:20,990 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1397676122, now seen corresponding path program 10 times [2020-10-13 23:35:20,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:20,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674826603] [2020-10-13 23:35:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:21,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:21,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:26,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:26,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:35:26,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:26,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:35:26,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:26,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:26,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:35:26,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:35:26,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:35:26,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:26,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:26,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:26,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:26,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:26,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:26,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:26,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:26,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:26,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:26,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:26,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 23:35:26,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674826603] [2020-10-13 23:35:26,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:26,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:35:26,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700938194] [2020-10-13 23:35:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:35:26,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:35:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:26,162 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 14 states. [2020-10-13 23:35:26,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:26,290 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-13 23:35:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:35:26,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-13 23:35:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:26,291 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:35:26,291 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:35:26,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:35:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 23:35:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:35:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-13 23:35:26,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2020-10-13 23:35:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:26,300 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-13 23:35:26,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:35:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-13 23:35:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:35:26,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:26,301 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:26,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:35:26,301 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash -110123167, now seen corresponding path program 11 times [2020-10-13 23:35:26,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:26,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197696570] [2020-10-13 23:35:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:26,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:26,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:26,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:35:31,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:31,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:31,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:31,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:31,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:31,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:31,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:31,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:31,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:31,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:31,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:31,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 23:35:31,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197696570] [2020-10-13 23:35:31,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:31,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:35:31,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805631552] [2020-10-13 23:35:31,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:35:31,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:35:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:31,461 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 15 states. [2020-10-13 23:35:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:31,618 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-10-13 23:35:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:35:31,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 23:35:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:31,619 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:35:31,620 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:35:31,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:35:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 23:35:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:35:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 23:35:31,628 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2020-10-13 23:35:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:31,628 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 23:35:31,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:35:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 23:35:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:35:31,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:31,630 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:31,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:35:31,630 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:31,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1531998470, now seen corresponding path program 12 times [2020-10-13 23:35:31,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:31,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193992970] [2020-10-13 23:35:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:31,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:36,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:35:36,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:36,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:35:36,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:36,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:35:36,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:35:36,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:35:36,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:36,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:36,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:36,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:36,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:36,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:36,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:36,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:36,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:36,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:36,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:36,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:36,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-13 23:35:36,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193992970] [2020-10-13 23:35:36,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:36,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:35:36,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945113507] [2020-10-13 23:35:36,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:35:36,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:36,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:35:36,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:36,812 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 16 states. [2020-10-13 23:35:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:36,987 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-13 23:35:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:35:36,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-13 23:35:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:36,989 INFO L225 Difference]: With dead ends: 100 [2020-10-13 23:35:36,989 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:35:36,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:35:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 23:35:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:35:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-13 23:35:36,997 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 53 [2020-10-13 23:35:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:36,997 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-13 23:35:36,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:35:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-13 23:35:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:35:36,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:36,998 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:36,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:35:36,998 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash -420881343, now seen corresponding path program 13 times [2020-10-13 23:35:36,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:36,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491604315] [2020-10-13 23:35:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:37,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:37,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:37,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:42,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:42,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:35:42,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:42,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:42,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:42,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:42,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:42,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:42,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:42,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 23:35:42,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491604315] [2020-10-13 23:35:42,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:42,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:35:42,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268277333] [2020-10-13 23:35:42,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:35:42,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:35:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:42,177 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 17 states. [2020-10-13 23:35:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:42,365 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-10-13 23:35:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:35:42,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-10-13 23:35:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:42,366 INFO L225 Difference]: With dead ends: 105 [2020-10-13 23:35:42,367 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:35:42,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:35:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 23:35:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:35:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 23:35:42,374 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2020-10-13 23:35:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:42,375 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 23:35:42,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:35:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 23:35:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:35:42,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:42,376 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:42,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:35:42,376 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1004884582, now seen corresponding path program 14 times [2020-10-13 23:35:42,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:42,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488133923] [2020-10-13 23:35:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:42,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:42,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:47,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:47,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:35:47,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:47,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:35:47,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:47,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:35:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:35:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:35:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:47,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:47,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:47,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:47,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:47,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:47,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:35:47,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:47,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:47,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:47,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:47,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:47,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 23:35:47,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488133923] [2020-10-13 23:35:47,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:47,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:35:47,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826133219] [2020-10-13 23:35:47,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:35:47,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:35:47,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:47,578 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 18 states. [2020-10-13 23:35:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:47,718 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-13 23:35:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:35:47,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-13 23:35:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:47,720 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:35:47,720 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:35:47,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:35:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 23:35:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:35:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-13 23:35:47,727 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 59 [2020-10-13 23:35:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:47,728 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-13 23:35:47,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:35:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-13 23:35:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:35:47,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:47,729 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:47,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:35:47,729 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1390483167, now seen corresponding path program 15 times [2020-10-13 23:35:47,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:47,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554535232] [2020-10-13 23:35:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:47,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:47,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:52,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:35:52,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:52,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:52,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:52,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:52,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:52,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:35:52,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:52,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:52,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:52,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-13 23:35:52,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554535232] [2020-10-13 23:35:52,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:52,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:35:52,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448817563] [2020-10-13 23:35:52,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:35:52,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:52,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:35:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:52,998 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 19 states. [2020-10-13 23:35:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:53,208 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2020-10-13 23:35:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:35:53,208 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-13 23:35:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:53,212 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:35:53,212 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:35:53,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:35:53,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 23:35:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:35:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-13 23:35:53,225 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 62 [2020-10-13 23:35:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:53,225 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-13 23:35:53,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:35:53,226 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-13 23:35:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:35:53,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:53,227 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:53,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:35:53,230 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2125345850, now seen corresponding path program 16 times [2020-10-13 23:35:53,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:53,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772476620] [2020-10-13 23:35:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:53,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:53,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:53,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:58,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:35:58,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:58,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:58,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:58,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:35:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:35:58,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:58,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:58,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:58,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:58,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:58,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:58,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-13 23:35:58,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772476620] [2020-10-13 23:35:58,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:58,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:35:58,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360700490] [2020-10-13 23:35:58,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:35:58,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:35:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:58,489 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 20 states. [2020-10-13 23:35:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:58,681 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-13 23:35:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:35:58,681 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-13 23:35:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:58,682 INFO L225 Difference]: With dead ends: 120 [2020-10-13 23:35:58,682 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:35:58,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:35:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 23:35:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:35:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-13 23:35:58,688 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 65 [2020-10-13 23:35:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:58,689 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-13 23:35:58,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:35:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-13 23:35:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:35:58,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:58,690 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:58,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:35:58,690 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1332687359, now seen corresponding path program 17 times [2020-10-13 23:35:58,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:58,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981788578] [2020-10-13 23:35:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:58,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:03,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:03,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:36:03,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:03,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:36:03,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:03,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:03,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:36:03,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:36:03,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:36:03,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:03,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:03,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:03,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:03,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:03,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:03,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:03,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:03,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:03,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-13 23:36:03,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981788578] [2020-10-13 23:36:03,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:03,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:36:03,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284164513] [2020-10-13 23:36:03,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:36:03,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:03,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:36:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:36:03,973 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 21 states. [2020-10-13 23:36:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:04,184 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 23:36:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:36:04,184 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-10-13 23:36:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:04,185 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:36:04,185 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:36:04,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:36:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:36:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 23:36:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:36:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 23:36:04,195 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 68 [2020-10-13 23:36:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:04,195 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 23:36:04,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:36:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 23:36:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:36:04,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:04,198 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:04,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:36:04,199 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash -33021222, now seen corresponding path program 18 times [2020-10-13 23:36:04,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:04,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028479265] [2020-10-13 23:36:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:04,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:04,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:09,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:09,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:36:09,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:09,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:36:09,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:09,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:09,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:36:09,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:36:09,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:36:09,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:36:09,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:09,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:09,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:09,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:09,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:09,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:09,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:09,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:09,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 23:36:09,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028479265] [2020-10-13 23:36:09,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:09,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:36:09,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624001962] [2020-10-13 23:36:09,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:36:09,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:36:09,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:36:09,503 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 22 states. [2020-10-13 23:36:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:09,644 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-13 23:36:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:36:09,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2020-10-13 23:36:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:09,646 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:36:09,646 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:36:09,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:36:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:36:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 23:36:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:36:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-13 23:36:09,653 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2020-10-13 23:36:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:09,653 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-13 23:36:09,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:36:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-13 23:36:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:36:09,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:09,654 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:09,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:36:09,654 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1723757855, now seen corresponding path program 19 times [2020-10-13 23:36:09,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:09,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558734996] [2020-10-13 23:36:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:09,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:09,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:14,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:14,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:36:14,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:36:14,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:14,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:36:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:36:14,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:14,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:14,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:14,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:14,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:14,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-13 23:36:14,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558734996] [2020-10-13 23:36:14,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:14,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:36:14,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460038787] [2020-10-13 23:36:14,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:36:14,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:36:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:14,957 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 23 states. [2020-10-13 23:36:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:15,185 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-10-13 23:36:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:36:15,185 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-10-13 23:36:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:15,186 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:36:15,186 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:36:15,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:36:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 23:36:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:36:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 23:36:15,199 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 74 [2020-10-13 23:36:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:15,204 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 23:36:15,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:36:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 23:36:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:36:15,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:15,205 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:15,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:36:15,205 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:15,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1471776390, now seen corresponding path program 20 times [2020-10-13 23:36:15,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:15,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746562682] [2020-10-13 23:36:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:15,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:15,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:20,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:20,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:36:20,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:36:20,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:20,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:36:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:36:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:36:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:20,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:20,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:20,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:20,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:20,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:20,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:20,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 23:36:20,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746562682] [2020-10-13 23:36:20,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:20,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:36:20,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095534257] [2020-10-13 23:36:20,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:36:20,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:36:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:20,549 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 24 states. [2020-10-13 23:36:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:20,724 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-13 23:36:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:36:20,727 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-13 23:36:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:20,728 INFO L225 Difference]: With dead ends: 140 [2020-10-13 23:36:20,728 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:36:20,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:36:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 23:36:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:36:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-13 23:36:20,734 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-10-13 23:36:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:20,734 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-13 23:36:20,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:36:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-13 23:36:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:36:20,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:20,735 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:20,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:36:20,736 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1924341697, now seen corresponding path program 21 times [2020-10-13 23:36:20,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:20,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368788594] [2020-10-13 23:36:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:20,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:20,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:21,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:25,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:25,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:36:25,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:25,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:36:25,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:25,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:25,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:36:25,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:36:25,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:36:25,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:26,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:26,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:26,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:26,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:26,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:26,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:26,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:26,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:26,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-13 23:36:26,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368788594] [2020-10-13 23:36:26,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:26,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:36:26,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995154911] [2020-10-13 23:36:26,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:36:26,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:36:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:26,080 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 25 states. [2020-10-13 23:36:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:26,266 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2020-10-13 23:36:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:36:26,267 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-10-13 23:36:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:26,268 INFO L225 Difference]: With dead ends: 145 [2020-10-13 23:36:26,268 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:36:26,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:36:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 23:36:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:36:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-13 23:36:26,274 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 80 [2020-10-13 23:36:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:26,274 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-13 23:36:26,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:36:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-13 23:36:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:36:26,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:26,275 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:26,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:36:26,276 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:26,276 INFO L82 PathProgramCache]: Analyzing trace with hash 473114, now seen corresponding path program 22 times [2020-10-13 23:36:26,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:26,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420539550] [2020-10-13 23:36:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:26,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:31,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:31,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:36:31,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:31,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:36:31,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:31,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:31,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:36:31,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:36:31,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:36:31,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:31,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:31,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:31,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:31,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:31,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:31,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:31,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:31,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:31,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:31,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-13 23:36:31,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420539550] [2020-10-13 23:36:31,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:31,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:36:31,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972624960] [2020-10-13 23:36:31,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:36:31,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:36:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:31,636 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 26 states. [2020-10-13 23:36:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:31,852 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-10-13 23:36:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:36:31,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2020-10-13 23:36:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:31,853 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:36:31,854 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:36:31,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:36:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 23:36:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:36:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-13 23:36:31,859 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 83 [2020-10-13 23:36:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:31,860 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-13 23:36:31,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:36:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-13 23:36:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:36:31,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:31,861 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:31,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:36:31,861 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash -874017631, now seen corresponding path program 23 times [2020-10-13 23:36:31,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:31,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266313264] [2020-10-13 23:36:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:31,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:31,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:36,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:36,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:36:36,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:36,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:36:36,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:36,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:36:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:36:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:36:36,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:37,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:37,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:37,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:37,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:37,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:36:37,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:37,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:37,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-13 23:36:37,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266313264] [2020-10-13 23:36:37,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:37,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:36:37,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985009079] [2020-10-13 23:36:37,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:36:37,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:36:37,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:37,261 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 27 states. [2020-10-13 23:36:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:37,559 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2020-10-13 23:36:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:36:37,560 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 86 [2020-10-13 23:36:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:37,561 INFO L225 Difference]: With dead ends: 155 [2020-10-13 23:36:37,561 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:36:37,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:36:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 23:36:37,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:36:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-13 23:36:37,567 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2020-10-13 23:36:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:37,567 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-13 23:36:37,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:36:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-13 23:36:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:36:37,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:37,568 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:37,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:36:37,568 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2073534790, now seen corresponding path program 24 times [2020-10-13 23:36:37,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:37,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233994697] [2020-10-13 23:36:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:37,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:37,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:42,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:42,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:36:42,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:42,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:36:42,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:42,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:36:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:36:42,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:42,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:42,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:42,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:42,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:42,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:42,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:36:42,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:42,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 23:36:43,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233994697] [2020-10-13 23:36:43,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:43,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:36:43,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641798395] [2020-10-13 23:36:43,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:36:43,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:43,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:36:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:43,003 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 28 states. [2020-10-13 23:36:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:43,270 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2020-10-13 23:36:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:36:43,271 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 89 [2020-10-13 23:36:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:43,272 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:36:43,272 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:36:43,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:36:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 23:36:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:36:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 23:36:43,279 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 89 [2020-10-13 23:36:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:43,280 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 23:36:43,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:36:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 23:36:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:36:43,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:43,281 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:43,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:36:43,281 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash -681520767, now seen corresponding path program 25 times [2020-10-13 23:36:43,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:43,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13653113] [2020-10-13 23:36:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:48,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:48,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:36:48,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:48,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:48,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:48,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:48,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:48,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:48,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:48,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:36:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-13 23:36:48,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13653113] [2020-10-13 23:36:48,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:48,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:36:48,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940406038] [2020-10-13 23:36:48,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:36:48,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:36:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:48,770 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 29 states. [2020-10-13 23:36:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:49,051 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2020-10-13 23:36:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:36:49,051 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-10-13 23:36:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:49,053 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:36:49,053 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:36:49,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:36:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 23:36:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:36:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-13 23:36:49,060 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-10-13 23:36:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:49,060 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-13 23:36:49,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:36:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-13 23:36:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:36:49,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:49,061 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:49,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:36:49,062 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1861751462, now seen corresponding path program 26 times [2020-10-13 23:36:49,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:49,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842653684] [2020-10-13 23:36:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:49,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:54,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:54,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:36:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:54,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:54,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:54,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:54,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-13 23:36:54,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842653684] [2020-10-13 23:36:54,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:54,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:36:54,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032549095] [2020-10-13 23:36:54,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:36:54,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:36:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:54,546 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 30 states. [2020-10-13 23:36:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:54,849 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2020-10-13 23:36:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:36:54,849 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 95 [2020-10-13 23:36:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:54,851 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:36:54,851 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:36:54,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:36:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 23:36:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:36:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-13 23:36:54,858 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 95 [2020-10-13 23:36:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:54,859 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-13 23:36:54,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:36:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-13 23:36:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 23:36:54,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:54,860 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:54,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:36:54,861 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1960776095, now seen corresponding path program 27 times [2020-10-13 23:36:54,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:54,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049154530] [2020-10-13 23:36:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:54,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:59,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:59,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:36:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:00,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:00,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:00,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:00,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:00,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:00,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:37:00,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:00,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:00,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:00,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:00,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:00,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-13 23:37:00,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049154530] [2020-10-13 23:37:00,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:00,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:37:00,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055769089] [2020-10-13 23:37:00,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:37:00,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:37:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:37:00,381 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 31 states. [2020-10-13 23:37:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:00,637 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-10-13 23:37:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:37:00,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 98 [2020-10-13 23:37:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:00,639 INFO L225 Difference]: With dead ends: 175 [2020-10-13 23:37:00,639 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:37:00,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:37:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:37:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 23:37:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:37:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-13 23:37:00,649 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 98 [2020-10-13 23:37:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:00,649 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-13 23:37:00,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:37:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-13 23:37:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:37:00,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:00,650 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:00,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:37:00,651 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1040442362, now seen corresponding path program 28 times [2020-10-13 23:37:00,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:00,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056848039] [2020-10-13 23:37:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:00,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:05,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:05,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:37:05,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:37:05,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:05,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:05,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:37:05,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:37:05,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:37:05,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:06,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:06,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:06,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:06,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:06,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:06,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:06,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:06,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:06,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:37:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-13 23:37:06,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056848039] [2020-10-13 23:37:06,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:06,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:37:06,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618291324] [2020-10-13 23:37:06,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:37:06,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:37:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:37:06,207 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 32 states. [2020-10-13 23:37:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:06,438 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2020-10-13 23:37:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:37:06,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 101 [2020-10-13 23:37:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:06,440 INFO L225 Difference]: With dead ends: 180 [2020-10-13 23:37:06,440 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:37:06,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:37:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:37:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 23:37:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 23:37:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-13 23:37:06,448 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 101 [2020-10-13 23:37:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:06,449 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-13 23:37:06,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:37:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-13 23:37:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:37:06,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:06,451 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:06,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:37:06,451 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:06,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1062608063, now seen corresponding path program 29 times [2020-10-13 23:37:06,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:06,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023120869] [2020-10-13 23:37:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:06,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:06,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:11,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:11,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 23:37:11,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:11,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:37:11,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:11,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:37:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:37:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:37:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:12,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:12,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:12,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:12,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:12,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:12,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:12,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:12,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:12,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:12,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:12,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:12,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-13 23:37:12,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023120869] [2020-10-13 23:37:12,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:12,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:37:12,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567062726] [2020-10-13 23:37:12,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:37:12,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:37:12,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:12,023 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 33 states. [2020-10-13 23:37:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:12,269 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2020-10-13 23:37:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:37:12,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2020-10-13 23:37:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:12,271 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:37:12,271 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:37:12,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:37:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 23:37:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:37:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 23:37:12,282 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 104 [2020-10-13 23:37:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:12,283 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 23:37:12,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:37:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 23:37:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:37:12,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:12,287 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:12,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:37:12,288 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:12,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1073365658, now seen corresponding path program 30 times [2020-10-13 23:37:12,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:12,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828246105] [2020-10-13 23:37:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:12,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:17,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:17,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:37:17,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:17,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:17,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:17,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:17,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:17,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:17,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:17,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:17,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-13 23:37:17,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828246105] [2020-10-13 23:37:17,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:17,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:37:17,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165714261] [2020-10-13 23:37:17,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:37:17,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:17,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:37:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:17,898 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 34 states. [2020-10-13 23:37:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:18,211 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2020-10-13 23:37:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:37:18,212 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 107 [2020-10-13 23:37:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:18,213 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:37:18,213 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:37:18,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:37:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 23:37:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:37:18,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-13 23:37:18,220 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 107 [2020-10-13 23:37:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:18,220 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-13 23:37:18,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:37:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-13 23:37:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:37:18,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:18,221 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:18,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:37:18,222 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:18,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1425911841, now seen corresponding path program 31 times [2020-10-13 23:37:18,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:18,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271445110] [2020-10-13 23:37:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:18,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:18,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:23,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:23,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 23:37:23,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:37:23,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:23,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:37:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:37:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:24,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:24,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:24,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:24,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:24,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:24,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:24,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:24,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:24,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:24,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:37:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-13 23:37:24,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271445110] [2020-10-13 23:37:24,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:24,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:37:24,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379106883] [2020-10-13 23:37:24,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:37:24,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:37:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:24,057 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 35 states. [2020-10-13 23:37:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:24,385 INFO L93 Difference]: Finished difference Result 195 states and 203 transitions. [2020-10-13 23:37:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:37:24,386 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 110 [2020-10-13 23:37:24,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:24,387 INFO L225 Difference]: With dead ends: 195 [2020-10-13 23:37:24,388 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 23:37:24,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 23:37:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-13 23:37:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:37:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-13 23:37:24,400 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 110 [2020-10-13 23:37:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:24,401 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-13 23:37:24,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:37:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-13 23:37:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 23:37:24,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:24,403 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:24,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:37:24,403 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:24,404 INFO L82 PathProgramCache]: Analyzing trace with hash -938931910, now seen corresponding path program 32 times [2020-10-13 23:37:24,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:24,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028772792] [2020-10-13 23:37:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:24,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:24,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:29,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:29,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:37:29,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:29,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:37:29,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:29,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:29,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:37:29,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:37:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:37:29,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:30,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:30,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:30,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:30,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:30,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-10-13 23:37:30,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028772792] [2020-10-13 23:37:30,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:30,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:37:30,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130798104] [2020-10-13 23:37:30,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:37:30,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:37:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:30,121 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 36 states. [2020-10-13 23:37:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:30,480 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2020-10-13 23:37:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:37:30,480 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-10-13 23:37:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:30,481 INFO L225 Difference]: With dead ends: 200 [2020-10-13 23:37:30,481 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:37:30,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:37:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-13 23:37:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:37:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-13 23:37:30,488 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 113 [2020-10-13 23:37:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:30,488 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-13 23:37:30,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:37:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-13 23:37:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 23:37:30,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:30,490 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:30,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:37:30,490 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1218336001, now seen corresponding path program 33 times [2020-10-13 23:37:30,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:30,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715647352] [2020-10-13 23:37:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:30,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:30,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:35,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 23:37:35,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:37:35,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:36,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:36,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:36,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:36,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:36,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:36,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:36,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:36,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-13 23:37:36,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715647352] [2020-10-13 23:37:36,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:36,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:37:36,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18516151] [2020-10-13 23:37:36,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:37:36,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:37:36,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:36,223 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 37 states. [2020-10-13 23:37:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:36,585 INFO L93 Difference]: Finished difference Result 205 states and 213 transitions. [2020-10-13 23:37:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:37:36,586 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 116 [2020-10-13 23:37:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:36,587 INFO L225 Difference]: With dead ends: 205 [2020-10-13 23:37:36,587 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:37:36,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:37:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 23:37:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:37:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-13 23:37:36,594 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 116 [2020-10-13 23:37:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:36,595 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-13 23:37:36,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:37:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-13 23:37:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:37:36,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:36,596 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:36,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:37:36,596 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:36,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1674459098, now seen corresponding path program 34 times [2020-10-13 23:37:36,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:36,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681863325] [2020-10-13 23:37:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:41,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:41,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:37:41,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:37:41,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:41,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:37:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:37:41,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:42,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:42,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:42,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:42,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-13 23:37:42,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681863325] [2020-10-13 23:37:42,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:42,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:37:42,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206773458] [2020-10-13 23:37:42,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:37:42,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:37:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:42,340 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 38 states. [2020-10-13 23:37:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:42,676 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-10-13 23:37:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:37:42,677 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 119 [2020-10-13 23:37:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:42,678 INFO L225 Difference]: With dead ends: 210 [2020-10-13 23:37:42,678 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:37:42,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:37:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-13 23:37:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:37:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-13 23:37:42,685 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 119 [2020-10-13 23:37:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:42,685 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-13 23:37:42,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:37:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-13 23:37:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:37:42,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:42,686 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:42,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:37:42,686 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash -544353823, now seen corresponding path program 35 times [2020-10-13 23:37:42,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:42,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792602986] [2020-10-13 23:37:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:42,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:42,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:47,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:47,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:37:47,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:37:47,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:47,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:37:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 23:37:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:37:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:48,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:48,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:48,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:48,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:48,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:48,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-13 23:37:48,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792602986] [2020-10-13 23:37:48,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:48,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:37:48,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517935100] [2020-10-13 23:37:48,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:37:48,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:37:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:48,502 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 39 states. [2020-10-13 23:37:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:48,775 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2020-10-13 23:37:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:37:48,776 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 122 [2020-10-13 23:37:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:48,777 INFO L225 Difference]: With dead ends: 215 [2020-10-13 23:37:48,777 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:37:48,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:37:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-13 23:37:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:37:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-10-13 23:37:48,788 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 122 [2020-10-13 23:37:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:48,788 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-10-13 23:37:48,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:37:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-10-13 23:37:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:37:48,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:48,789 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:48,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:37:48,790 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash -580399494, now seen corresponding path program 36 times [2020-10-13 23:37:48,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:48,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100302050] [2020-10-13 23:37:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:53,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:54,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:54,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:54,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:54,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:54,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:54,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:54,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:54,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2020-10-13 23:37:54,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100302050] [2020-10-13 23:37:54,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:54,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:37:54,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794399137] [2020-10-13 23:37:54,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:37:54,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:54,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:37:54,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:54,641 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 40 states. [2020-10-13 23:37:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:55,043 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2020-10-13 23:37:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:37:55,043 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 125 [2020-10-13 23:37:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:55,045 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:37:55,045 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:37:55,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:37:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-13 23:37:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:37:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-13 23:37:55,052 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 125 [2020-10-13 23:37:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:55,052 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-13 23:37:55,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:37:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-13 23:37:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:37:55,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:55,053 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:55,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:37:55,053 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:55,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1051842879, now seen corresponding path program 37 times [2020-10-13 23:37:55,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:55,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902271840] [2020-10-13 23:37:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:55,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:55,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:00,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:00,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 23:38:00,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:00,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:38:00,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:00,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:38:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:38:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:38:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:00,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:00,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:00,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:00,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:00,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:00,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:00,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-10-13 23:38:00,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902271840] [2020-10-13 23:38:00,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:00,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:38:00,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100158462] [2020-10-13 23:38:00,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:38:00,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:00,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:38:00,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:38:00,935 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 41 states. [2020-10-13 23:38:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:01,233 INFO L93 Difference]: Finished difference Result 225 states and 233 transitions. [2020-10-13 23:38:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:38:01,234 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 128 [2020-10-13 23:38:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:01,235 INFO L225 Difference]: With dead ends: 225 [2020-10-13 23:38:01,235 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:38:01,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:38:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:38:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 23:38:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:38:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2020-10-13 23:38:01,244 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 128 [2020-10-13 23:38:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:01,244 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2020-10-13 23:38:01,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:38:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2020-10-13 23:38:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:38:01,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:01,247 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:01,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:38:01,248 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 460573978, now seen corresponding path program 38 times [2020-10-13 23:38:01,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:01,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402759353] [2020-10-13 23:38:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:01,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:06,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:38:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:38:06,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:07,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:07,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:07,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:07,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:07,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:07,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:07,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:07,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:07,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:07,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:07,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:07,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-10-13 23:38:07,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402759353] [2020-10-13 23:38:07,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:07,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:38:07,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734746178] [2020-10-13 23:38:07,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:38:07,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:38:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:38:07,172 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 42 states. [2020-10-13 23:38:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:07,682 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2020-10-13 23:38:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:38:07,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 131 [2020-10-13 23:38:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:07,684 INFO L225 Difference]: With dead ends: 230 [2020-10-13 23:38:07,684 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:38:07,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:38:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:38:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-13 23:38:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 23:38:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-10-13 23:38:07,690 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 131 [2020-10-13 23:38:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:07,691 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-10-13 23:38:07,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:38:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-10-13 23:38:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 23:38:07,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:07,692 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:07,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:38:07,692 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:07,692 INFO L82 PathProgramCache]: Analyzing trace with hash 417420193, now seen corresponding path program 39 times [2020-10-13 23:38:07,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:07,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259954061] [2020-10-13 23:38:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:12,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:12,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:38:12,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:13,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:13,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:13,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:13,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:13,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:13,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:13,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-10-13 23:38:13,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259954061] [2020-10-13 23:38:13,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:13,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:38:13,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245963297] [2020-10-13 23:38:13,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:38:13,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:13,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:38:13,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:13,666 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 43 states. [2020-10-13 23:38:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:14,019 INFO L93 Difference]: Finished difference Result 235 states and 243 transitions. [2020-10-13 23:38:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:38:14,020 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2020-10-13 23:38:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:14,021 INFO L225 Difference]: With dead ends: 235 [2020-10-13 23:38:14,021 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:38:14,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:38:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 23:38:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:38:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 23:38:14,027 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 134 [2020-10-13 23:38:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:14,028 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 23:38:14,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:38:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 23:38:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:38:14,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:14,029 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:14,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:38:14,029 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash 17839034, now seen corresponding path program 40 times [2020-10-13 23:38:14,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:14,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009490340] [2020-10-13 23:38:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:19,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:19,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:38:19,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:19,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:38:19,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:19,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:38:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:38:19,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:20,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:20,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:20,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:20,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:20,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:20,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:20,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:20,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:20,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:20,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:20,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-13 23:38:20,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009490340] [2020-10-13 23:38:20,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:20,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:38:20,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886508586] [2020-10-13 23:38:20,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:38:20,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:38:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:20,038 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 44 states. [2020-10-13 23:38:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:20,402 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-10-13 23:38:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:38:20,402 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 137 [2020-10-13 23:38:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:20,403 INFO L225 Difference]: With dead ends: 240 [2020-10-13 23:38:20,403 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:38:20,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:38:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-13 23:38:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 23:38:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2020-10-13 23:38:20,409 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 137 [2020-10-13 23:38:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:20,409 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2020-10-13 23:38:20,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:38:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2020-10-13 23:38:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 23:38:20,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:20,410 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:20,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:38:20,411 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:20,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:20,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1261873023, now seen corresponding path program 41 times [2020-10-13 23:38:20,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:20,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914539314] [2020-10-13 23:38:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:20,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:25,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 23:38:25,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:26,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:26,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:26,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:26,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:26,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:26,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:26,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:26,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:26,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:26,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:26,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:26,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-10-13 23:38:26,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914539314] [2020-10-13 23:38:26,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:26,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:38:26,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288656888] [2020-10-13 23:38:26,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:38:26,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:38:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:26,454 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand 45 states. [2020-10-13 23:38:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:26,876 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2020-10-13 23:38:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:38:26,877 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 140 [2020-10-13 23:38:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:26,878 INFO L225 Difference]: With dead ends: 245 [2020-10-13 23:38:26,879 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 23:38:26,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 23:38:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-13 23:38:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:38:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2020-10-13 23:38:26,886 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 140 [2020-10-13 23:38:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:26,886 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2020-10-13 23:38:26,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:38:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2020-10-13 23:38:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:38:26,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:26,887 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:26,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:38:26,888 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1306198618, now seen corresponding path program 42 times [2020-10-13 23:38:26,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:26,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636262162] [2020-10-13 23:38:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:26,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:27,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:31,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 23:38:31,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:31,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:38:31,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:31,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 23:38:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:31,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:38:31,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:32,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:32,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:32,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:32,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:32,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2020-10-13 23:38:33,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636262162] [2020-10-13 23:38:33,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:33,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 23:38:33,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954962398] [2020-10-13 23:38:33,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 23:38:33,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:33,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 23:38:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:38:33,004 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand 46 states. [2020-10-13 23:38:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:33,307 INFO L93 Difference]: Finished difference Result 250 states and 258 transitions. [2020-10-13 23:38:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 23:38:33,307 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 143 [2020-10-13 23:38:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:33,309 INFO L225 Difference]: With dead ends: 250 [2020-10-13 23:38:33,309 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:38:33,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:38:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:38:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 23:38:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:38:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2020-10-13 23:38:33,315 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 143 [2020-10-13 23:38:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:33,316 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2020-10-13 23:38:33,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 23:38:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2020-10-13 23:38:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 23:38:33,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:33,317 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:33,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:38:33,317 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash 654849377, now seen corresponding path program 43 times [2020-10-13 23:38:33,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:33,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766089753] [2020-10-13 23:38:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:33,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:38,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 23:38:38,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:38,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:38:38,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:38,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 23:38:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 23:38:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:38:38,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:39,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:39,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:39,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:39,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:39,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:39,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:39,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:39,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:39,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:39,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:39,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-10-13 23:38:39,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766089753] [2020-10-13 23:38:39,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:39,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 23:38:39,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860350136] [2020-10-13 23:38:39,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 23:38:39,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:39,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 23:38:39,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:38:39,426 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand 47 states. [2020-10-13 23:38:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:39,895 INFO L93 Difference]: Finished difference Result 255 states and 263 transitions. [2020-10-13 23:38:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 23:38:39,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 146 [2020-10-13 23:38:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:39,897 INFO L225 Difference]: With dead ends: 255 [2020-10-13 23:38:39,897 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:38:39,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:38:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:38:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-13 23:38:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:38:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2020-10-13 23:38:39,903 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 146 [2020-10-13 23:38:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:39,904 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2020-10-13 23:38:39,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 23:38:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2020-10-13 23:38:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 23:38:39,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:39,905 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:39,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:38:39,905 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2113026298, now seen corresponding path program 44 times [2020-10-13 23:38:39,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:39,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136058257] [2020-10-13 23:38:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:40,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:44,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:44,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:38:44,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:46,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:46,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:46,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:46,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:46,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:46,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:46,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:46,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:46,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-10-13 23:38:46,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136058257] [2020-10-13 23:38:46,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:46,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 23:38:46,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750162117] [2020-10-13 23:38:46,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 23:38:46,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 23:38:46,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:38:46,147 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand 48 states. [2020-10-13 23:38:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:46,634 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2020-10-13 23:38:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 23:38:46,634 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 149 [2020-10-13 23:38:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:46,636 INFO L225 Difference]: With dead ends: 260 [2020-10-13 23:38:46,636 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:38:46,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:38:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:38:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-13 23:38:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 23:38:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-13 23:38:46,642 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 149 [2020-10-13 23:38:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:46,642 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-13 23:38:46,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 23:38:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-13 23:38:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 23:38:46,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:46,644 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:46,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:38:46,644 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:46,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:46,644 INFO L82 PathProgramCache]: Analyzing trace with hash -450893247, now seen corresponding path program 45 times [2020-10-13 23:38:46,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:46,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002064641] [2020-10-13 23:38:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking...